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author | Rajith Muditha Attapattu <rajith@apache.org> | 2011-05-27 15:44:23 +0000 |
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committer | Rajith Muditha Attapattu <rajith@apache.org> | 2011-05-27 15:44:23 +0000 |
commit | 66765100f4257159622cefe57bed50125a5ad017 (patch) | |
tree | a88ee23bb194eb91f0ebb2d9b23ff423e3ea8e37 /qpid/java/client/src/main/java/org/apache/qpid/filter/BinaryExpression.java | |
parent | 1aeaa7b16e5ce54f10c901d75c4d40f9f88b9db6 (diff) | |
parent | 88b98b2f4152ef59a671fad55a0d08338b6b78ca (diff) | |
download | qpid-python-66765100f4257159622cefe57bed50125a5ad017.tar.gz |
Creating a branch for experimenting with some ideas for JMS client.rajith_jms_client
git-svn-id: https://svn.apache.org/repos/asf/qpid/branches/rajith_jms_client@1128369 13f79535-47bb-0310-9956-ffa450edef68
Diffstat (limited to 'qpid/java/client/src/main/java/org/apache/qpid/filter/BinaryExpression.java')
-rw-r--r-- | qpid/java/client/src/main/java/org/apache/qpid/filter/BinaryExpression.java | 103 |
1 files changed, 103 insertions, 0 deletions
diff --git a/qpid/java/client/src/main/java/org/apache/qpid/filter/BinaryExpression.java b/qpid/java/client/src/main/java/org/apache/qpid/filter/BinaryExpression.java new file mode 100644 index 0000000000..f97f858fad --- /dev/null +++ b/qpid/java/client/src/main/java/org/apache/qpid/filter/BinaryExpression.java @@ -0,0 +1,103 @@ +/* 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; + +/** + * An expression which performs an operation on two expression values. + */ +public abstract class BinaryExpression implements Expression +{ + protected Expression left; + protected 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 Object#toString() + */ + public String toString() + { + return "(" + left.toString() + " " + getExpressionSymbol() + " " + right.toString() + ")"; + } + + /** + * TODO: more efficient hashCode() + * + * @see Object#hashCode() + */ + public int hashCode() + { + return toString().hashCode(); + } + + /** + * TODO: more efficient hashCode() + * + * @see Object#equals(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(); + + /** + * @param expression + */ + public void setRight(Expression expression) + { + right = expression; + } + + /** + * @param expression + */ + public void setLeft(Expression expression) + { + left = expression; + } + +} |