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Diffstat (limited to 'framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/types/Comparison.java')
-rw-r--r-- | framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/types/Comparison.java | 95 |
1 files changed, 95 insertions, 0 deletions
diff --git a/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/types/Comparison.java b/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/types/Comparison.java new file mode 100644 index 00000000..a057d0d7 --- /dev/null +++ b/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/types/Comparison.java @@ -0,0 +1,95 @@ +/* + * 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.tools.ant.types; + +import java.util.Arrays; + +import org.apache.tools.ant.BuildException; + +/** + * EnumeratedAttribute for generic comparisons. Accepts values + * "equal", "greater", "more", "less", "ne" (not equal), + * "ge" (greater or equal), "le" (less or equal), "eq" (equal), + * "gt" (greater), "lt" (less). + * @since Ant 1.7 + */ +public class Comparison extends EnumeratedAttribute { + private static final String[] VALUES + = new String[] {"equal", "greater", "less", + "ne", "ge", "le", "eq", "gt", "lt", "more"}; + + /** Equal Comparison. */ + public static final Comparison EQUAL = new Comparison("equal"); + + /** Not-Equal Comparison. */ + public static final Comparison NOT_EQUAL = new Comparison("ne"); + + /** Greater Comparison. */ + public static final Comparison GREATER = new Comparison("greater"); + + /** Less Comparison. */ + public static final Comparison LESS = new Comparison("less"); + + /** Greater-or-Equal Comparison. */ + public static final Comparison GREATER_EQUAL = new Comparison("ge"); + + /** Less-or-Equal Comparison. */ + public static final Comparison LESS_EQUAL = new Comparison("le"); + + private static final int[] EQUAL_INDEX = {0, 4, 5, 6}; + private static final int[] LESS_INDEX = {2, 3, 5, 8}; + private static final int[] GREATER_INDEX = {1, 3, 4, 7, 9}; + + /** + * Default constructor. + */ + public Comparison() { + } + + /** + * Construct a new Comparison with the specified value. + * @param value the EnumeratedAttribute value. + */ + public Comparison(String value) { + setValue(value); + } + + /** + * Return the possible values. + * @return String[] of EnumeratedAttribute values. + */ + public String[] getValues() { + return VALUES; + } + + /** + * Evaluate a comparison result as from Comparator.compare() or Comparable.compareTo(). + * @param comparisonResult the result to evaluate. + * @return true if the comparison result fell within the parameters of this Comparison. + */ + public boolean evaluate(int comparisonResult) { + if (getIndex() == -1) { + throw new BuildException("Comparison value not set."); + } + int[] i = comparisonResult < 0 ? LESS_INDEX + : comparisonResult > 0 ? GREATER_INDEX : EQUAL_INDEX; + return Arrays.binarySearch(i, getIndex()) >= 0; + } + +} + |