1 files changed, 43 insertions, 0 deletions
diff --git a/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/types/resources/comparators/Exists.java b/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/types/resources/comparators/Exists.java
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--- /dev/null
+++ b/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/types/resources/comparators/Exists.java
@@ -0,0 +1,43 @@
+/*
+ *  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.resources.comparators;
+
+import org.apache.tools.ant.types.Resource;
+
+/**
+ * Compares Resources by existence.  Not existing is "less than" existing.
+ * @since Ant 1.7
+ */
+public class Exists extends ResourceComparator {
+
+    /**
+     * Compare two Resources.
+     * @param foo the first Resource.
+     * @param bar the second Resource.
+     * @return a negative integer, zero, or a positive integer as the first
+     *         argument is less than, equal to, or greater than the second.
+     */
+    protected int resourceCompare(Resource foo, Resource bar) {
+        boolean f = foo.isExists();
+        if (f == bar.isExists()) {
+            return 0;
+        }
+        return f ? 1 : -1;
+    }
+
+}