diff options
Diffstat (limited to 'qpid/java/common/src/main/java/org/apache/qpid/filter')
11 files changed, 2004 insertions, 0 deletions
diff --git a/qpid/java/common/src/main/java/org/apache/qpid/filter/ArithmeticExpression.java b/qpid/java/common/src/main/java/org/apache/qpid/filter/ArithmeticExpression.java new file mode 100644 index 0000000000..47d970cfbd --- /dev/null +++ b/qpid/java/common/src/main/java/org/apache/qpid/filter/ArithmeticExpression.java @@ -0,0 +1,272 @@ +/** + * + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF licenses this file to You under the Apache License, Version 2.0 + * (the "License"); you may not use this file except in compliance with + * the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +package org.apache.qpid.filter; +// +// Based on like named file from r450141 of the Apache ActiveMQ project <http://www.activemq.org/site/home.html> +// + +/** + * An expression which performs an operation on two expression values + */ +public abstract class ArithmeticExpression extends BinaryExpression +{ + + protected static final int INTEGER = 1; + protected static final int LONG = 2; + protected static final int DOUBLE = 3; + + /** + * @param left + * @param right + */ + public ArithmeticExpression(Expression left, Expression right) + { + super(left, right); + } + + public static Expression createPlus(Expression left, Expression right) + { + return new ArithmeticExpression(left, right) + { + protected Object evaluate(Object lvalue, Object rvalue) + { + if (lvalue instanceof String) + { + String text = (String) lvalue; + String answer = text + rvalue; + + return answer; + } + else if (lvalue instanceof Number) + { + return plus((Number) lvalue, asNumber(rvalue)); + } + + throw new SelectorParsingException("Cannot call plus operation on: " + lvalue + " and: " + rvalue); + } + + public String getExpressionSymbol() + { + return "+"; + } + }; + } + + public static Expression createMinus(Expression left, Expression right) + { + return new ArithmeticExpression(left, right) + { + protected Object evaluate(Object lvalue, Object rvalue) + { + if (lvalue instanceof Number) + { + return minus((Number) lvalue, asNumber(rvalue)); + } + + throw new SelectorParsingException("Cannot call minus operation on: " + lvalue + " and: " + rvalue); + } + + public String getExpressionSymbol() + { + return "-"; + } + }; + } + + public static Expression createMultiply(Expression left, Expression right) + { + return new ArithmeticExpression(left, right) + { + + protected Object evaluate(Object lvalue, Object rvalue) + { + if (lvalue instanceof Number) + { + return multiply((Number) lvalue, asNumber(rvalue)); + } + + throw new SelectorParsingException("Cannot call multiply operation on: " + lvalue + " and: " + rvalue); + } + + public String getExpressionSymbol() + { + return "*"; + } + }; + } + + public static Expression createDivide(Expression left, Expression right) + { + return new ArithmeticExpression(left, right) + { + + protected Object evaluate(Object lvalue, Object rvalue) + { + if (lvalue instanceof Number) + { + return divide((Number) lvalue, asNumber(rvalue)); + } + + throw new SelectorParsingException("Cannot call divide operation on: " + lvalue + " and: " + rvalue); + } + + public String getExpressionSymbol() + { + return "/"; + } + }; + } + + public static Expression createMod(Expression left, Expression right) + { + return new ArithmeticExpression(left, right) + { + + protected Object evaluate(Object lvalue, Object rvalue) + { + if (lvalue instanceof Number) + { + return mod((Number) lvalue, asNumber(rvalue)); + } + + throw new SelectorParsingException("Cannot call mod operation on: " + lvalue + " and: " + rvalue); + } + + public String getExpressionSymbol() + { + return "%"; + } + }; + } + + protected Number plus(Number left, Number right) + { + switch (numberType(left, right)) + { + + case INTEGER: + return Integer.valueOf(left.intValue() + right.intValue()); + + case LONG: + return Long.valueOf(left.longValue() + right.longValue()); + + default: + return Double.valueOf(left.doubleValue() + right.doubleValue()); + } + } + + protected Number minus(Number left, Number right) + { + switch (numberType(left, right)) + { + + case INTEGER: + return Integer.valueOf(left.intValue() - right.intValue()); + + case LONG: + return Long.valueOf(left.longValue() - right.longValue()); + + default: + return Double.valueOf(left.doubleValue() - right.doubleValue()); + } + } + + protected Number multiply(Number left, Number right) + { + switch (numberType(left, right)) + { + + case INTEGER: + return Integer.valueOf(left.intValue() * right.intValue()); + + case LONG: + return Long.valueOf(left.longValue() * right.longValue()); + + default: + return Double.valueOf(left.doubleValue() * right.doubleValue()); + } + } + + protected Number divide(Number left, Number right) + { + return Double.valueOf(left.doubleValue() / right.doubleValue()); + } + + protected Number mod(Number left, Number right) + { + return Double.valueOf(left.doubleValue() % right.doubleValue()); + } + + private int numberType(Number left, Number right) + { + if (isDouble(left) || isDouble(right)) + { + return DOUBLE; + } + else if ((left instanceof Long) || (right instanceof Long)) + { + return LONG; + } + else + { + return INTEGER; + } + } + + private boolean isDouble(Number n) + { + return (n instanceof Float) || (n instanceof Double); + } + + protected Number asNumber(Object value) + { + if (value instanceof Number) + { + return (Number) value; + } + else + { + throw new SelectorParsingException("Cannot convert value: " + value + " into a number"); + } + } + + public Object evaluate(FilterableMessage message) + { + Object lvalue = getLeft().evaluate(message); + if (lvalue == null) + { + return null; + } + + Object rvalue = getRight().evaluate(message); + if (rvalue == null) + { + return null; + } + + return evaluate(lvalue, rvalue); + } + + /** + * @param lvalue + * @param rvalue + * @return + */ + protected abstract Object evaluate(Object lvalue, Object rvalue); + +} diff --git a/qpid/java/common/src/main/java/org/apache/qpid/filter/BinaryExpression.java b/qpid/java/common/src/main/java/org/apache/qpid/filter/BinaryExpression.java new file mode 100644 index 0000000000..6467bbbe1f --- /dev/null +++ b/qpid/java/common/src/main/java/org/apache/qpid/filter/BinaryExpression.java @@ -0,0 +1,90 @@ +/** + * + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF licenses this file to You under the Apache License, Version 2.0 + * (the "License"); you may not use this file except in compliance with + * the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +package org.apache.qpid.filter; +// +// Based on like named file from r450141 of the Apache ActiveMQ project <http://www.activemq.org/site/home.html> +// + +/** + * An expression which performs an operation on two expression values. + */ +public abstract class BinaryExpression implements Expression +{ + private final Expression left; + private final Expression right; + + public BinaryExpression(Expression left, Expression right) + { + this.left = left; + this.right = right; + } + + public Expression getLeft() + { + return left; + } + + public Expression getRight() + { + return right; + } + + /** + * @see java.lang.Object#toString() + */ + public String toString() + { + return "(" + left.toString() + " " + getExpressionSymbol() + " " + right.toString() + ")"; + } + + /** + * TODO: more efficient hashCode() + * + * @see java.lang.Object#hashCode() + */ + public int hashCode() + { + return toString().hashCode(); + } + + /** + * TODO: more efficient hashCode() + * + * @see java.lang.Object#equals(java.lang.Object) + */ + public boolean equals(Object o) + { + + if ((o == null) || !this.getClass().equals(o.getClass())) + { + return false; + } + + return toString().equals(o.toString()); + + } + + /** + * Returns the symbol that represents this binary expression. For example, addition is + * represented by "+" + * + * @return + */ + public abstract String getExpressionSymbol(); + +} diff --git a/qpid/java/common/src/main/java/org/apache/qpid/filter/BooleanExpression.java b/qpid/java/common/src/main/java/org/apache/qpid/filter/BooleanExpression.java new file mode 100644 index 0000000000..13e1604d5f --- /dev/null +++ b/qpid/java/common/src/main/java/org/apache/qpid/filter/BooleanExpression.java @@ -0,0 +1,36 @@ +/** + * + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF licenses this file to You under the Apache License, Version 2.0 + * (the "License"); you may not use this file except in compliance with + * the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +package org.apache.qpid.filter; +// +// Based on like named file from r450141 of the Apache ActiveMQ project <http://www.activemq.org/site/home.html> +// + +/** + * A BooleanExpression is an expression that always + * produces a Boolean result. + */ +public interface BooleanExpression extends Expression +{ + + /** + * @param message + * @return true if the expression evaluates to Boolean.TRUE. + */ + public boolean matches(FilterableMessage message); + +} diff --git a/qpid/java/common/src/main/java/org/apache/qpid/filter/ComparisonExpression.java b/qpid/java/common/src/main/java/org/apache/qpid/filter/ComparisonExpression.java new file mode 100644 index 0000000000..2cfb97dc6c --- /dev/null +++ b/qpid/java/common/src/main/java/org/apache/qpid/filter/ComparisonExpression.java @@ -0,0 +1,596 @@ +/* + * + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, + * software distributed under the License is distributed on an + * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY + * KIND, either express or implied. See the License for the + * specific language governing permissions and limitations + * under the License. + * + */ +package org.apache.qpid.filter; +// +// Based on like named file from r450141 of the Apache ActiveMQ project <http://www.activemq.org/site/home.html> +// + +import java.util.HashSet; +import java.util.List; +import java.util.regex.Pattern; + +/** + * A filter performing a comparison of two objects + */ +public abstract class ComparisonExpression extends BinaryExpression implements BooleanExpression +{ + + public static BooleanExpression createBetween(Expression value, Expression left, Expression right) + { + return LogicExpression.createAND(createGreaterThanEqual(value, left), createLessThanEqual(value, right)); + } + + public static BooleanExpression createNotBetween(Expression value, Expression left, Expression right) + { + return LogicExpression.createOR(createLessThan(value, left), createGreaterThan(value, right)); + } + + private static final HashSet<Character> REGEXP_CONTROL_CHARS = new HashSet<Character>(); + + static + { + REGEXP_CONTROL_CHARS.add('.'); + REGEXP_CONTROL_CHARS.add('\\'); + REGEXP_CONTROL_CHARS.add('['); + REGEXP_CONTROL_CHARS.add(']'); + REGEXP_CONTROL_CHARS.add('^'); + REGEXP_CONTROL_CHARS.add('$'); + REGEXP_CONTROL_CHARS.add('?'); + REGEXP_CONTROL_CHARS.add('*'); + REGEXP_CONTROL_CHARS.add('+'); + REGEXP_CONTROL_CHARS.add('{'); + REGEXP_CONTROL_CHARS.add('}'); + REGEXP_CONTROL_CHARS.add('|'); + REGEXP_CONTROL_CHARS.add('('); + REGEXP_CONTROL_CHARS.add(')'); + REGEXP_CONTROL_CHARS.add(':'); + REGEXP_CONTROL_CHARS.add('&'); + REGEXP_CONTROL_CHARS.add('<'); + REGEXP_CONTROL_CHARS.add('>'); + REGEXP_CONTROL_CHARS.add('='); + REGEXP_CONTROL_CHARS.add('!'); + } + + static class LikeExpression extends UnaryExpression implements BooleanExpression + { + + private Pattern likePattern; + + /** + * @param right + */ + public LikeExpression(Expression right, String like, int escape) + { + super(right); + + StringBuffer regexp = new StringBuffer(like.length() * 2); + regexp.append("\\A"); // The beginning of the input + for (int i = 0; i < like.length(); i++) + { + char c = like.charAt(i); + if (escape == (0xFFFF & c)) + { + i++; + if (i >= like.length()) + { + // nothing left to escape... + break; + } + + char t = like.charAt(i); + regexp.append("\\x"); + regexp.append(Integer.toHexString(0xFFFF & t)); + } + else if (c == '%') + { + regexp.append(".*?"); // Do a non-greedy match + } + else if (c == '_') + { + regexp.append("."); // match one + } + else if (REGEXP_CONTROL_CHARS.contains(c)) + { + regexp.append("\\x"); + regexp.append(Integer.toHexString(0xFFFF & c)); + } + else + { + regexp.append(c); + } + } + + regexp.append("\\z"); // The end of the input + + likePattern = Pattern.compile(regexp.toString(), Pattern.DOTALL); + } + + /** + * org.apache.activemq.filter.UnaryExpression#getExpressionSymbol() + */ + public String getExpressionSymbol() + { + return "LIKE"; + } + + /** + * org.apache.activemq.filter.Expression#evaluate(MessageEvaluationContext) + */ + public Object evaluate(FilterableMessage message) + { + + Object rv = this.getRight().evaluate(message); + + if (rv == null) + { + return null; + } + + if (!(rv instanceof String)) + { + return + Boolean.FALSE; + } + + return likePattern.matcher((String) rv).matches() ? Boolean.TRUE : Boolean.FALSE; + } + + public boolean matches(FilterableMessage message) + { + Object object = evaluate(message); + + return (object != null) && (object == Boolean.TRUE); + } + } + + public static BooleanExpression createLike(Expression left, String right, String escape) + { + if ((escape != null) && (escape.length() != 1)) + { + throw new SelectorParsingException( + "The ESCAPE string literal is invalid. It can only be one character. Litteral used: " + escape); + } + + int c = -1; + if (escape != null) + { + c = 0xFFFF & escape.charAt(0); + } + + return new LikeExpression(left, right, c); + } + + public static BooleanExpression createNotLike(Expression left, String right, String escape) + { + return UnaryExpression.createNOT(createLike(left, right, escape)); + } + + public static BooleanExpression createInFilter(Expression left, List elements) + { + + if (!(left instanceof PropertyExpression)) + { + throw new SelectorParsingException("Expected a property for In expression, got: " + left); + } + + return UnaryExpression.createInExpression((PropertyExpression) left, elements, false); + + } + + public static BooleanExpression createNotInFilter(Expression left, List elements) + { + + if (!(left instanceof PropertyExpression)) + { + throw new SelectorParsingException("Expected a property for In expression, got: " + left); + } + + return UnaryExpression.createInExpression((PropertyExpression) left, elements, true); + + } + + public static BooleanExpression createIsNull(Expression left) + { + return doCreateEqual(left, ConstantExpression.NULL); + } + + public static BooleanExpression createIsNotNull(Expression left) + { + return UnaryExpression.createNOT(doCreateEqual(left, ConstantExpression.NULL)); + } + + public static BooleanExpression createNotEqual(Expression left, Expression right) + { + return UnaryExpression.createNOT(createEqual(left, right)); + } + + public static BooleanExpression createEqual(Expression left, Expression right) + { + checkEqualOperand(left); + checkEqualOperand(right); + checkEqualOperandCompatability(left, right); + + return doCreateEqual(left, right); + } + + private static BooleanExpression doCreateEqual(Expression left, Expression right) + { + return new EqualExpression(left, right); + } + + public static BooleanExpression createGreaterThan(final Expression left, final Expression right) + { + checkLessThanOperand(left); + checkLessThanOperand(right); + + return new ComparisonExpression(left, right) + { + protected boolean asBoolean(int answer) + { + return answer > 0; + } + + public String getExpressionSymbol() + { + return ">"; + } + }; + } + + public static BooleanExpression createGreaterThanEqual(final Expression left, final Expression right) + { + checkLessThanOperand(left); + checkLessThanOperand(right); + + return new ComparisonExpression(left, right) + { + protected boolean asBoolean(int answer) + { + return answer >= 0; + } + + public String getExpressionSymbol() + { + return ">="; + } + }; + } + + public static BooleanExpression createLessThan(final Expression left, final Expression right) + { + checkLessThanOperand(left); + checkLessThanOperand(right); + + return new ComparisonExpression(left, right) + { + + protected boolean asBoolean(int answer) + { + return answer < 0; + } + + public String getExpressionSymbol() + { + return "<"; + } + + }; + } + + public static BooleanExpression createLessThanEqual(final Expression left, final Expression right) + { + checkLessThanOperand(left); + checkLessThanOperand(right); + + return new ComparisonExpression(left, right) + { + + protected boolean asBoolean(int answer) + { + return answer <= 0; + } + + public String getExpressionSymbol() + { + return "<="; + } + }; + } + + /** + * Only Numeric expressions can be used in >, >=, < or <= expressions.s + * + * @param expr + */ + public static void checkLessThanOperand(Expression expr) + { + if (expr instanceof ConstantExpression) + { + Object value = ((ConstantExpression) expr).getValue(); + if (value instanceof Number) + { + return; + } + + // Else it's boolean or a String.. + throw new SelectorParsingException("Value '" + expr + "' cannot be compared."); + } + + if (expr instanceof BooleanExpression) + { + throw new SelectorParsingException("Value '" + expr + "' cannot be compared."); + } + } + + /** + * Validates that the expression can be used in == or <> expression. + * Cannot not be NULL TRUE or FALSE literals. + * + * @param expr + */ + public static void checkEqualOperand(Expression expr) + { + if (expr instanceof ConstantExpression) + { + Object value = ((ConstantExpression) expr).getValue(); + if (value == null) + { + throw new SelectorParsingException("'" + expr + "' cannot be compared."); + } + } + } + + /** + * + * @param left + * @param right + */ + private static void checkEqualOperandCompatability(Expression left, Expression right) + { + if ((left instanceof ConstantExpression) && (right instanceof ConstantExpression)) + { + if ((left instanceof BooleanExpression) && !(right instanceof BooleanExpression)) + { + throw new SelectorParsingException("'" + left + "' cannot be compared with '" + right + "'"); + } + } + } + + /** + * @param left + * @param right + */ + public ComparisonExpression(Expression left, Expression right) + { + super(left, right); + } + + public Object evaluate(FilterableMessage message) + { + Comparable lv = (Comparable) getLeft().evaluate(message); + if (lv == null) + { + return null; + } + + Comparable rv = (Comparable) getRight().evaluate(message); + if (rv == null) + { + return null; + } + + return compare(lv, rv); + } + + protected Boolean compare(Comparable lv, Comparable rv) + { + Class lc = lv.getClass(); + Class rc = rv.getClass(); + // If the the objects are not of the same type, + // try to convert up to allow the comparison. + if (lc != rc) + { + if (lc == Byte.class) + { + if (rc == Short.class) + { + lv = ((Number) lv).shortValue(); + } + else if (rc == Integer.class) + { + lv = ((Number) lv).intValue(); + } + else if (rc == Long.class) + { + lv = ((Number) lv).longValue(); + } + else if (rc == Float.class) + { + lv = ((Number) lv).floatValue(); + } + else if (rc == Double.class) + { + lv = ((Number) lv).doubleValue(); + } + else + { + return Boolean.FALSE; + } + } + else if (lc == Short.class) + { + if (rc == Integer.class) + { + lv = ((Number) lv).intValue(); + } + else if (rc == Long.class) + { + lv = ((Number) lv).longValue(); + } + else if (rc == Float.class) + { + lv = ((Number) lv).floatValue(); + } + else if (rc == Double.class) + { + lv = ((Number) lv).doubleValue(); + } + else + { + return Boolean.FALSE; + } + } + else if (lc == Integer.class) + { + if (rc == Long.class) + { + lv = ((Number) lv).longValue(); + } + else if (rc == Float.class) + { + lv = ((Number) lv).floatValue(); + } + else if (rc == Double.class) + { + lv = ((Number) lv).doubleValue(); + } + else + { + return Boolean.FALSE; + } + } + else if (lc == Long.class) + { + if (rc == Integer.class) + { + rv = ((Number) rv).longValue(); + } + else if (rc == Float.class) + { + lv = ((Number) lv).floatValue(); + } + else if (rc == Double.class) + { + lv = ((Number) lv).doubleValue(); + } + else + { + return Boolean.FALSE; + } + } + else if (lc == Float.class) + { + if (rc == Integer.class) + { + rv = ((Number) rv).floatValue(); + } + else if (rc == Long.class) + { + rv = ((Number) rv).floatValue(); + } + else if (rc == Double.class) + { + lv = ((Number) lv).doubleValue(); + } + else + { + return Boolean.FALSE; + } + } + else if (lc == Double.class) + { + if (rc == Integer.class) + { + rv = ((Number) rv).doubleValue(); + } + else if (rc == Long.class) + { + rv = ((Number) rv).doubleValue(); + } + else if (rc == Float.class) + { + rv = ((Number) rv).doubleValue(); + } + else + { + return Boolean.FALSE; + } + } + else + { + return Boolean.FALSE; + } + } + + return asBoolean(lv.compareTo(rv)) ? Boolean.TRUE : Boolean.FALSE; + } + + protected abstract boolean asBoolean(int answer); + + public boolean matches(FilterableMessage message) + { + Object object = evaluate(message); + + return (object != null) && (object == Boolean.TRUE); + } + + private static class EqualExpression extends ComparisonExpression + { + public EqualExpression(final Expression left, final Expression right) + { + super(left, right); + } + + public Object evaluate(FilterableMessage message) + { + Object lv = getLeft().evaluate(message); + Object rv = getRight().evaluate(message); + + // Iff one of the values is null + if ((lv == null) ^ (rv == null)) + { + return Boolean.FALSE; + } + + if ((lv == rv) || lv.equals(rv)) + { + return Boolean.TRUE; + } + + if ((lv instanceof Comparable) && (rv instanceof Comparable)) + { + return compare((Comparable) lv, (Comparable) rv); + } + + return Boolean.FALSE; + } + + protected boolean asBoolean(int answer) + { + return answer == 0; + } + + public String getExpressionSymbol() + { + return "="; + } + } +} diff --git a/qpid/java/common/src/main/java/org/apache/qpid/filter/ConstantExpression.java b/qpid/java/common/src/main/java/org/apache/qpid/filter/ConstantExpression.java new file mode 100644 index 0000000000..20c9f1438a --- /dev/null +++ b/qpid/java/common/src/main/java/org/apache/qpid/filter/ConstantExpression.java @@ -0,0 +1,207 @@ +/* + * + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, + * software distributed under the License is distributed on an + * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY + * KIND, either express or implied. See the License for the + * specific language governing permissions and limitations + * under the License. + * + */ +package org.apache.qpid.filter; +// +// Based on like named file from r450141 of the Apache ActiveMQ project <http://www.activemq.org/site/home.html> +// + +import java.math.BigDecimal; + +/** + * Represents a constant expression + */ +public class ConstantExpression implements Expression +{ + + static class BooleanConstantExpression extends ConstantExpression implements BooleanExpression + { + public BooleanConstantExpression(Object value) + { + super(value); + } + + public boolean matches(FilterableMessage message) + { + Object object = evaluate(message); + + return (object != null) && (object == Boolean.TRUE); + } + } + + public static final BooleanConstantExpression NULL = new BooleanConstantExpression(null); + public static final BooleanConstantExpression TRUE = new BooleanConstantExpression(Boolean.TRUE); + public static final BooleanConstantExpression FALSE = new BooleanConstantExpression(Boolean.FALSE); + + private Object value; + + public static ConstantExpression createFromDecimal(String text) + { + + // Strip off the 'l' or 'L' if needed. + if (text.endsWith("l") || text.endsWith("L")) + { + text = text.substring(0, text.length() - 1); + } + + Number value; + try + { + value = new Long(text); + } + catch (NumberFormatException e) + { + // The number may be too big to fit in a long. + value = new BigDecimal(text); + } + + long l = value.longValue(); + if ((Integer.MIN_VALUE <= l) && (l <= Integer.MAX_VALUE)) + { + value = value.intValue(); + } + + return new ConstantExpression(value); + } + + public static ConstantExpression createFromHex(String text) + { + Number value = Long.parseLong(text.substring(2), 16); + long l = value.longValue(); + if ((Integer.MIN_VALUE <= l) && (l <= Integer.MAX_VALUE)) + { + value = value.intValue(); + } + + return new ConstantExpression(value); + } + + public static ConstantExpression createFromOctal(String text) + { + Number value = Long.parseLong(text, 8); + long l = value.longValue(); + if ((Integer.MIN_VALUE <= l) && (l <= Integer.MAX_VALUE)) + { + value = value.intValue(); + } + + return new ConstantExpression(value); + } + + public static ConstantExpression createFloat(String text) + { + Number value = new Double(text); + + return new ConstantExpression(value); + } + + public ConstantExpression(Object value) + { + this.value = value; + } + + public Object evaluate(FilterableMessage message) + { + return value; + } + + public Object getValue() + { + return value; + } + + /** + * @see java.lang.Object#toString() + */ + public String toString() + { + if (value == null) + { + return "NULL"; + } + + if (value instanceof Boolean) + { + return ((Boolean) value) ? "TRUE" : "FALSE"; + } + + if (value instanceof String) + { + return encodeString((String) value); + } + + return value.toString(); + } + + /** + * TODO: more efficient hashCode() + * + * @see java.lang.Object#hashCode() + */ + public int hashCode() + { + return toString().hashCode(); + } + + /** + * TODO: more efficient hashCode() + * + * @see java.lang.Object#equals(java.lang.Object) + */ + public boolean equals(Object o) + { + + if ((o == null) || !this.getClass().equals(o.getClass())) + { + return false; + } + + return toString().equals(o.toString()); + + } + + /** + * Encodes the value of string so that it looks like it would look like + * when it was provided in a selector. + * + * @param s + * @return + */ + public static String encodeString(String s) + { + StringBuffer b = new StringBuffer(); + b.append('\''); + for (int i = 0; i < s.length(); i++) + { + char c = s.charAt(i); + if (c == '\'') + { + b.append(c); + } + + b.append(c); + } + + b.append('\''); + + return b.toString(); + } + +} diff --git a/qpid/java/common/src/main/java/org/apache/qpid/filter/Expression.java b/qpid/java/common/src/main/java/org/apache/qpid/filter/Expression.java new file mode 100644 index 0000000000..1030c7b588 --- /dev/null +++ b/qpid/java/common/src/main/java/org/apache/qpid/filter/Expression.java @@ -0,0 +1,34 @@ +/** + * + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF licenses this file to You under the Apache License, Version 2.0 + * (the "License"); you may not use this file except in compliance with + * the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +package org.apache.qpid.filter; +// +// Based on like named file from r450141 of the Apache ActiveMQ project <http://www.activemq.org/site/home.html> +// + +/** + * Represents an expression + */ +public interface Expression +{ + + /** + * @return the value of this expression + */ + public Object evaluate(FilterableMessage message); + +} diff --git a/qpid/java/common/src/main/java/org/apache/qpid/filter/FilterableMessage.java b/qpid/java/common/src/main/java/org/apache/qpid/filter/FilterableMessage.java new file mode 100644 index 0000000000..b5b00ae70f --- /dev/null +++ b/qpid/java/common/src/main/java/org/apache/qpid/filter/FilterableMessage.java @@ -0,0 +1,41 @@ +package org.apache.qpid.filter; + +/** + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF licenses this file to You under the Apache License, Version 2.0 + * (the "License"); you may not use this file except in compliance with + * the License. You may obtain a copy of the License at + * <p/> + * http://www.apache.org/licenses/LICENSE-2.0 + * <p/> + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +public interface FilterableMessage +{ + + boolean isPersistent(); + + boolean isRedelivered(); + + Object getHeader(String name); + + String getReplyTo(); + + String getType(); + + byte getPriority(); + + String getMessageId(); + + long getTimestamp(); + + String getCorrelationId(); + + long getExpiration(); +} diff --git a/qpid/java/common/src/main/java/org/apache/qpid/filter/LogicExpression.java b/qpid/java/common/src/main/java/org/apache/qpid/filter/LogicExpression.java new file mode 100644 index 0000000000..f8ec19d23b --- /dev/null +++ b/qpid/java/common/src/main/java/org/apache/qpid/filter/LogicExpression.java @@ -0,0 +1,118 @@ +/** + * + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF licenses this file to You under the Apache License, Version 2.0 + * (the "License"); you may not use this file except in compliance with + * the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +package org.apache.qpid.filter; +// +// Based on like named file from r450141 of the Apache ActiveMQ project <http://www.activemq.org/site/home.html> +// + +/** + * A filter performing a comparison of two objects + */ +public abstract class LogicExpression extends BinaryExpression implements BooleanExpression +{ + + public static BooleanExpression createOR(BooleanExpression lvalue, BooleanExpression rvalue) + { + return new OrExpression(lvalue, rvalue); + } + + public static BooleanExpression createAND(BooleanExpression lvalue, BooleanExpression rvalue) + { + return new AndExpression(lvalue, rvalue); + } + + /** + * @param left + * @param right + */ + public LogicExpression(BooleanExpression left, BooleanExpression right) + { + super(left, right); + } + + public abstract Object evaluate(FilterableMessage message); + + public boolean matches(FilterableMessage message) + { + Object object = evaluate(message); + + return (object != null) && (object == Boolean.TRUE); + } + + private static class OrExpression extends LogicExpression + { + public OrExpression(final BooleanExpression lvalue, final BooleanExpression rvalue) + { + super(lvalue, rvalue); + } + + public Object evaluate(FilterableMessage message) + { + + Boolean lv = (Boolean) getLeft().evaluate(message); + // Can we do an OR shortcut?? + if ((lv != null) && lv.booleanValue()) + { + return Boolean.TRUE; + } + + Boolean rv = (Boolean) getRight().evaluate(message); + + return (rv == null) ? null : rv; + } + + public String getExpressionSymbol() + { + return "OR"; + } + } + + private static class AndExpression extends LogicExpression + { + public AndExpression(final BooleanExpression lvalue, final BooleanExpression rvalue) + { + super(lvalue, rvalue); + } + + public Object evaluate(FilterableMessage message) + { + + Boolean lv = (Boolean) getLeft().evaluate(message); + + // Can we do an AND shortcut?? + if (lv == null) + { + return null; + } + + if (!lv.booleanValue()) + { + return Boolean.FALSE; + } + + Boolean rv = (Boolean) getRight().evaluate(message); + + return (rv == null) ? null : rv; + } + + public String getExpressionSymbol() + { + return "AND"; + } + } +} diff --git a/qpid/java/common/src/main/java/org/apache/qpid/filter/PropertyExpression.java b/qpid/java/common/src/main/java/org/apache/qpid/filter/PropertyExpression.java new file mode 100644 index 0000000000..4fb9c0e62f --- /dev/null +++ b/qpid/java/common/src/main/java/org/apache/qpid/filter/PropertyExpression.java @@ -0,0 +1,234 @@ +/* + * + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, + * software distributed under the License is distributed on an + * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY + * KIND, either express or implied. See the License for the + * specific language governing permissions and limitations + * under the License. + * + */ +package org.apache.qpid.filter; +// +// Based on like named file from r450141 of the Apache ActiveMQ project <http://www.activemq.org/site/home.html> +// + + +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +import java.util.HashMap; + +/** + * Represents a property expression + */ +public class PropertyExpression implements Expression +{ + // Constants - defined the same as JMS + private static enum JMSDeliveryMode { NON_PERSISTENT, PERSISTENT } + + private static final int DEFAULT_PRIORITY = 4; + + private static final Logger _logger = LoggerFactory.getLogger(PropertyExpression.class); + + private static final HashMap<String, Expression> JMS_PROPERTY_EXPRESSIONS = new HashMap<String, Expression>(); + + { + JMS_PROPERTY_EXPRESSIONS.put("JMSDestination", new Expression() + { + public Object evaluate(FilterableMessage message) + { + //TODO + return null; + } + }); + JMS_PROPERTY_EXPRESSIONS.put("JMSReplyTo", new ReplyToExpression()); + + JMS_PROPERTY_EXPRESSIONS.put("JMSType", new TypeExpression()); + + JMS_PROPERTY_EXPRESSIONS.put("JMSDeliveryMode", new DeliveryModeExpression()); + + JMS_PROPERTY_EXPRESSIONS.put("JMSPriority", new PriorityExpression()); + + JMS_PROPERTY_EXPRESSIONS.put("JMSMessageID", new MessageIDExpression()); + + JMS_PROPERTY_EXPRESSIONS.put("AMQMessageID", new MessageIDExpression()); + + JMS_PROPERTY_EXPRESSIONS.put("JMSTimestamp", new TimestampExpression()); + + JMS_PROPERTY_EXPRESSIONS.put("JMSCorrelationID", new CorrelationIdExpression()); + + JMS_PROPERTY_EXPRESSIONS.put("JMSExpiration", new ExpirationExpression()); + + JMS_PROPERTY_EXPRESSIONS.put("JMSRedelivered", new Expression() + { + public Object evaluate(FilterableMessage message) + { + return message.isRedelivered(); + } + }); + } + + private final String name; + private final Expression jmsPropertyExpression; + + public boolean outerTest() + { + return false; + } + + public PropertyExpression(String name) + { + this.name = name; + + + + jmsPropertyExpression = JMS_PROPERTY_EXPRESSIONS.get(name); + } + + public Object evaluate(FilterableMessage message) + { + + if (jmsPropertyExpression != null) + { + return jmsPropertyExpression.evaluate(message); + } + else + { + return message.getHeader(name); + } + } + + public String getName() + { + return name; + } + + /** + * @see java.lang.Object#toString() + */ + public String toString() + { + return name; + } + + /** + * @see java.lang.Object#hashCode() + */ + public int hashCode() + { + return name.hashCode(); + } + + /** + * @see java.lang.Object#equals(java.lang.Object) + */ + public boolean equals(Object o) + { + + if ((o == null) || !this.getClass().equals(o.getClass())) + { + return false; + } + + return name.equals(((PropertyExpression) o).name); + + } + + private static class ReplyToExpression implements Expression + { + public Object evaluate(FilterableMessage message) + { + String replyTo = message.getReplyTo(); + return replyTo; + } + + } + + private static class TypeExpression implements Expression + { + public Object evaluate(FilterableMessage message) + { + + String type = message.getType(); + return type; + + } + } + + private static class DeliveryModeExpression implements Expression + { + public Object evaluate(FilterableMessage message) + { + JMSDeliveryMode mode = message.isPersistent() ? JMSDeliveryMode.PERSISTENT : + JMSDeliveryMode.NON_PERSISTENT; + if (_logger.isDebugEnabled()) + { + _logger.debug("JMSDeliveryMode is :" + mode); + } + + return mode.toString(); + } + } + + private static class PriorityExpression implements Expression + { + public Object evaluate(FilterableMessage message) + { + byte priority = message.getPriority(); + return (int) priority; + } + } + + private static class MessageIDExpression implements Expression + { + public Object evaluate(FilterableMessage message) + { + + String messageId = message.getMessageId(); + + return messageId; + + } + } + + private static class TimestampExpression implements Expression + { + public Object evaluate(FilterableMessage message) + { + long timestamp = message.getTimestamp(); + return timestamp; + } + } + + private static class CorrelationIdExpression implements Expression + { + public Object evaluate(FilterableMessage message) + { + + String correlationId = message.getCorrelationId(); + + return correlationId; + } + } + + private static class ExpirationExpression implements Expression + { + public Object evaluate(FilterableMessage message) + { + long expiration = message.getExpiration(); + return expiration; + + } + } +} diff --git a/qpid/java/common/src/main/java/org/apache/qpid/filter/SelectorParsingException.java b/qpid/java/common/src/main/java/org/apache/qpid/filter/SelectorParsingException.java new file mode 100644 index 0000000000..f08b3df155 --- /dev/null +++ b/qpid/java/common/src/main/java/org/apache/qpid/filter/SelectorParsingException.java @@ -0,0 +1,36 @@ +package org.apache.qpid.filter; + +/** + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF licenses this file to You under the Apache License, Version 2.0 + * (the "License"); you may not use this file except in compliance with + * the License. You may obtain a copy of the License at + * <p/> + * http://www.apache.org/licenses/LICENSE-2.0 + * <p/> + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +public class SelectorParsingException extends RuntimeException +{ + public SelectorParsingException(String s) + { + super(s); + } + + public SelectorParsingException(String message, Throwable cause) + { + super(message, cause); + } + + public SelectorParsingException(Throwable cause) + { + super(cause); + } + +} diff --git a/qpid/java/common/src/main/java/org/apache/qpid/filter/UnaryExpression.java b/qpid/java/common/src/main/java/org/apache/qpid/filter/UnaryExpression.java new file mode 100644 index 0000000000..b80b89840c --- /dev/null +++ b/qpid/java/common/src/main/java/org/apache/qpid/filter/UnaryExpression.java @@ -0,0 +1,340 @@ +/* + * + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, + * software distributed under the License is distributed on an + * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY + * KIND, either express or implied. See the License for the + * specific language governing permissions and limitations + * under the License. + * + */ +package org.apache.qpid.filter; +// +// Based on like named file from r450141 of the Apache ActiveMQ project <http://www.activemq.org/site/home.html> +// + +import java.math.BigDecimal; +import java.util.Collection; +import java.util.HashSet; +import java.util.List; + +/** + * An expression which performs an operation on two expression values + */ +public abstract class UnaryExpression implements Expression +{ + + private static final BigDecimal BD_LONG_MIN_VALUE = BigDecimal.valueOf(Long.MIN_VALUE); + private Expression right; + + public static Expression createNegate(Expression left) + { + return new NegativeExpression(left); + } + + public static BooleanExpression createInExpression(PropertyExpression right, List elements, final boolean not) + { + + // Use a HashSet if there are many elements. + Collection t; + if (elements.size() == 0) + { + t = null; + } + else if (elements.size() < 5) + { + t = elements; + } + else + { + t = new HashSet(elements); + } + + final Collection inList = t; + + return new InExpression(right, inList, not); + } + + abstract static class BooleanUnaryExpression extends UnaryExpression implements BooleanExpression + { + public BooleanUnaryExpression(Expression left) + { + super(left); + } + + public boolean matches(FilterableMessage message) + { + Object object = evaluate(message); + + return (object != null) && (object == Boolean.TRUE); + } + } + + public static BooleanExpression createNOT(BooleanExpression left) + { + return new NotExpression(left); + } + + public static BooleanExpression createBooleanCast(Expression left) + { + return new BooleanCastExpression(left); + } + + private static Number negate(Number left) + { + Class clazz = left.getClass(); + if (clazz == Integer.class) + { + return -left.intValue(); + } + else if (clazz == Long.class) + { + return -left.longValue(); + } + else if (clazz == Float.class) + { + return -left.floatValue(); + } + else if (clazz == Double.class) + { + return -left.doubleValue(); + } + else if (clazz == BigDecimal.class) + { + // We ussually get a big deciamal when we have Long.MIN_VALUE constant in the + // Selector. Long.MIN_VALUE is too big to store in a Long as a positive so we store it + // as a Big decimal. But it gets Negated right away.. to here we try to covert it back + // to a Long. + BigDecimal bd = (BigDecimal) left; + bd = bd.negate(); + + if (BD_LONG_MIN_VALUE.compareTo(bd) == 0) + { + return Long.MIN_VALUE; + } + + return bd; + } + else + { + throw new SelectorParsingException("Don't know how to negate: " + left); + } + } + + public UnaryExpression(Expression left) + { + this.right = left; + } + + public Expression getRight() + { + return right; + } + + /** + * @see java.lang.Object#toString() + */ + public String toString() + { + return "(" + getExpressionSymbol() + " " + right.toString() + ")"; + } + + /** + * TODO: more efficient hashCode() + * + * @see java.lang.Object#hashCode() + */ + public int hashCode() + { + return toString().hashCode(); + } + + /** + * TODO: more efficient hashCode() + * + * @see java.lang.Object#equals(java.lang.Object) + */ + public boolean equals(Object o) + { + return ((o != null) && this.getClass().equals(o.getClass())) && toString().equals(o.toString()); + } + + /** + * Returns the symbol that represents this binary expression. For example, addition is + * represented by "+" + * + * @return symbol + */ + public abstract String getExpressionSymbol(); + + private static class NegativeExpression extends UnaryExpression + { + public NegativeExpression(final Expression left) + { + super(left); + } + + public Object evaluate(FilterableMessage message) + { + Object rvalue = getRight().evaluate(message); + if (rvalue == null) + { + return null; + } + + if (rvalue instanceof Number) + { + return negate((Number) rvalue); + } + + return null; + } + + public String getExpressionSymbol() + { + return "-"; + } + } + + private static class InExpression extends BooleanUnaryExpression + { + private final Collection _inList; + private final boolean _not; + + public InExpression(final PropertyExpression right, final Collection inList, final boolean not) + { + super(right); + _inList = inList; + _not = not; + } + + public Object evaluate(FilterableMessage message) + { + + Object rvalue = getRight().evaluate(message); + if (rvalue == null) + { + return null; + } + + if (rvalue.getClass() != String.class) + { + return null; + } + + if (((_inList != null) && _inList.contains(rvalue)) ^ _not) + { + return Boolean.TRUE; + } + else + { + return Boolean.FALSE; + } + + } + + public String toString() + { + StringBuilder answer = new StringBuilder(String.valueOf(getRight())); + answer.append(" "); + answer.append(getExpressionSymbol()); + answer.append(" ( "); + + int count = 0; + for (Object o : _inList) + { + if (count != 0) + { + answer.append(", "); + } + + answer.append(o); + count++; + } + + answer.append(" )"); + + return answer.toString(); + } + + public String getExpressionSymbol() + { + if (_not) + { + return "NOT IN"; + } + else + { + return "IN"; + } + } + } + + private static class NotExpression extends BooleanUnaryExpression + { + public NotExpression(final BooleanExpression left) + { + super(left); + } + + public Object evaluate(FilterableMessage message) + { + Boolean lvalue = (Boolean) getRight().evaluate(message); + if (lvalue == null) + { + return null; + } + + return lvalue ? Boolean.FALSE : Boolean.TRUE; + } + + public String getExpressionSymbol() + { + return "NOT"; + } + } + + private static class BooleanCastExpression extends BooleanUnaryExpression + { + public BooleanCastExpression(final Expression left) + { + super(left); + } + + public Object evaluate(FilterableMessage message) + { + Object rvalue = getRight().evaluate(message); + if (rvalue == null) + { + return null; + } + + if (!rvalue.getClass().equals(Boolean.class)) + { + return Boolean.FALSE; + } + + return ((Boolean) rvalue) ? Boolean.TRUE : Boolean.FALSE; + } + + public String toString() + { + return getRight().toString(); + } + + public String getExpressionSymbol() + { + return ""; + } + } +} |