diff options
Diffstat (limited to 'trunk/qpid/java/client/src/main/java/org/apache/qpid/filter/ArithmeticExpression.java')
-rw-r--r-- | trunk/qpid/java/client/src/main/java/org/apache/qpid/filter/ArithmeticExpression.java | 268 |
1 files changed, 0 insertions, 268 deletions
diff --git a/trunk/qpid/java/client/src/main/java/org/apache/qpid/filter/ArithmeticExpression.java b/trunk/qpid/java/client/src/main/java/org/apache/qpid/filter/ArithmeticExpression.java deleted file mode 100644 index 56d1bdcdc5..0000000000 --- a/trunk/qpid/java/client/src/main/java/org/apache/qpid/filter/ArithmeticExpression.java +++ /dev/null @@ -1,268 +0,0 @@ -/* 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; - -import org.apache.qpid.QpidException; -import org.apache.qpid.client.message.AbstractJMSMessage; - - -/** - * 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; - - - 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; - return text + rvalue; - } - else if (lvalue instanceof Number) - { - return plus((Number) lvalue, asNumber(rvalue)); - } - - throw new RuntimeException("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 RuntimeException("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 RuntimeException("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 RuntimeException("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 RuntimeException("Cannot call mod operation on: " + lvalue + " and: " + rvalue); - } - - public String getExpressionSymbol() - { - return "%"; - } - }; - } - - protected Number plus(Number left, Number right) - { - switch (numberType(left, right)) - { - - case ArithmeticExpression.INTEGER: - return new Integer(left.intValue() + right.intValue()); - - case ArithmeticExpression.LONG: - return new Long(left.longValue() + right.longValue()); - - default: - return new Double(left.doubleValue() + right.doubleValue()); - } - } - - protected Number minus(Number left, Number right) - { - switch (numberType(left, right)) - { - - case ArithmeticExpression.INTEGER: - return new Integer(left.intValue() - right.intValue()); - - case ArithmeticExpression.LONG: - return new Long(left.longValue() - right.longValue()); - - default: - return new Double(left.doubleValue() - right.doubleValue()); - } - } - - protected Number multiply(Number left, Number right) - { - switch (numberType(left, right)) - { - - case ArithmeticExpression.INTEGER: - return new Integer(left.intValue() * right.intValue()); - - case ArithmeticExpression.LONG: - return new Long(left.longValue() * right.longValue()); - - default: - return new Double(left.doubleValue() * right.doubleValue()); - } - } - - protected Number divide(Number left, Number right) - { - return new Double(left.doubleValue() / right.doubleValue()); - } - - protected Number mod(Number left, Number right) - { - return new Double(left.doubleValue() % right.doubleValue()); - } - - private int numberType(Number left, Number right) - { - if (isDouble(left) || isDouble(right)) - { - return ArithmeticExpression.DOUBLE; - } - else if ((left instanceof Long) || (right instanceof Long)) - { - return ArithmeticExpression.LONG; - } - else - { - return ArithmeticExpression.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 RuntimeException("Cannot convert value: " + value + " into a number"); - } - } - - public Object evaluate(AbstractJMSMessage message) throws QpidException - { - Object lvalue = left.evaluate(message); - if (lvalue == null) - { - return null; - } - - Object rvalue = right.evaluate(message); - if (rvalue == null) - { - return null; - } - - return evaluate(lvalue, rvalue); - } - - /** - * @param lvalue - * @param rvalue - * @return - */ - protected abstract Object evaluate(Object lvalue, Object rvalue); - -} |