diff options
Diffstat (limited to 'qpid/java/broker/src/main/java/org/apache/qpid/server/filter/ArithmeticExpression.java')
-rw-r--r-- | qpid/java/broker/src/main/java/org/apache/qpid/server/filter/ArithmeticExpression.java | 275 |
1 files changed, 0 insertions, 275 deletions
diff --git a/qpid/java/broker/src/main/java/org/apache/qpid/server/filter/ArithmeticExpression.java b/qpid/java/broker/src/main/java/org/apache/qpid/server/filter/ArithmeticExpression.java deleted file mode 100644 index fb5220f4da..0000000000 --- a/qpid/java/broker/src/main/java/org/apache/qpid/server/filter/ArithmeticExpression.java +++ /dev/null @@ -1,275 +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.server.filter; -// -// Based on like named file from r450141 of the Apache ActiveMQ project <http://www.activemq.org/site/home.html> -// - -import org.apache.qpid.AMQException; -import org.apache.qpid.server.queue.AMQMessage; - -/** - * 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 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 INTEGER: - return new Integer(left.intValue() + right.intValue()); - - case 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 INTEGER: - return new Integer(left.intValue() - right.intValue()); - - case 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 INTEGER: - return new Integer(left.intValue() * right.intValue()); - - case 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 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 RuntimeException("Cannot convert value: " + value + " into a number"); - } - } - - public Object evaluate(AMQMessage message) throws AMQException - { - 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); - -} |