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author | Robert Gemmell <robbie@apache.org> | 2015-06-25 10:22:51 +0000 |
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committer | Robert Gemmell <robbie@apache.org> | 2015-06-25 10:22:51 +0000 |
commit | 32ae758bc2e8fd962b66a4ab6341b14009f1907e (patch) | |
tree | 2f4d8174813284a6ea58bb6b7f6520aa92287476 /qpid/tools/src/java/qpid-qmf2/src/main/java/org/apache/qpid/qmf2/common/BooleanLessEqual.java | |
parent | 116d91ad7825a98af36a869fc751206fbce0c59f (diff) | |
parent | f7e896076143de4572b4f1f67ef0765125f2498d (diff) | |
download | qpid-python-32ae758bc2e8fd962b66a4ab6341b14009f1907e.tar.gz |
NO-JIRA: create branch for qpid-cpp 0.34 RC process
git-svn-id: https://svn.apache.org/repos/asf/qpid/branches/qpid-cpp-0.34-rc@1687469 13f79535-47bb-0310-9956-ffa450edef68
Diffstat (limited to 'qpid/tools/src/java/qpid-qmf2/src/main/java/org/apache/qpid/qmf2/common/BooleanLessEqual.java')
-rw-r--r-- | qpid/tools/src/java/qpid-qmf2/src/main/java/org/apache/qpid/qmf2/common/BooleanLessEqual.java | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/qpid/tools/src/java/qpid-qmf2/src/main/java/org/apache/qpid/qmf2/common/BooleanLessEqual.java b/qpid/tools/src/java/qpid-qmf2/src/main/java/org/apache/qpid/qmf2/common/BooleanLessEqual.java new file mode 100644 index 0000000000..2461f116d9 --- /dev/null +++ b/qpid/tools/src/java/qpid-qmf2/src/main/java/org/apache/qpid/qmf2/common/BooleanLessEqual.java @@ -0,0 +1,89 @@ +/* + * + * 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.qmf2.common; + +// Misc Imports +import java.util.List; + +/** + * A class to create and evaluate the BooleanLessEqual Expression + * + * @author Fraser Adams + */ +public final class BooleanLessEqual extends BooleanExpression +{ + /** + * Factory method to create an instance of BooleanLessEqual + * @param expr the List of Expressions extracted by parsing the Query predicate + * @return an instance of the concrete BooleanExpression + */ + public Expression create(final List expr) throws QmfException + { + return new BooleanLessEqual(expr); + } + + /** + * Basic Constructor primarily used by the prototype instance of each concrete BooleanExpression + */ + public BooleanLessEqual() + { + } + + /** + * Main Constructor, uses base class constructor to populate unevaluated operands + * @param expr the List of Expressions extracted by parsing the Query predicate + */ + public BooleanLessEqual(final List expr) throws QmfException + { + super(2, expr); + } + + /** + * Evaluate "less than or equal to" expression against a QmfData instance. + * N.B. to avoid complexities with types this class treats operands as Strings performing an appropriate evaluation + * of the String that makes sense for a given expression e.g. parsing as a double for {@literal >, >=, <, <= } + * + * @param data the object to evaluate the expression against + * @return true if query matches the QmfData instance, else false. + */ + public boolean evaluate(final QmfData data) + { + populateOperands(data); + + if (_operands[0] == null || _operands[1] == null) + { + return false; + } + + try + { + double l = Double.parseDouble(_operands[0]); + double r = Double.parseDouble(_operands[1]); + return l <= r; + } + catch (NumberFormatException nfe) + { + // If converting to double fails try a lexicographic comparison + return _operands[0].compareTo(_operands[1]) <= 0; + } + } +} + |