1 files changed, 91 insertions, 0 deletions
diff --git a/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/types/resources/comparators/Reverse.java b/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/types/resources/comparators/Reverse.java
new file mode 100644
index 00000000..c787a765
--- /dev/null
+++ b/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/types/resources/comparators/Reverse.java
@@ -0,0 +1,91 @@
+/*
+ *  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 java.util.Stack;
+
+import org.apache.tools.ant.BuildException;
+import org.apache.tools.ant.Project;
+import org.apache.tools.ant.types.DataType;
+import org.apache.tools.ant.types.Resource;
+
+/**
+ * Reverses another ResourceComparator.  If no nested ResourceComparator
+ * is supplied, the compared Resources' natural order will be reversed.
+ * @since Ant 1.7
+ */
+public class Reverse extends ResourceComparator {
+    private static final String ONE_NESTED
+        = "You must not nest more than one ResourceComparator for reversal.";
+
+    private ResourceComparator nested;
+
+    /**
+     * Default constructor.
+     */
+    public Reverse() {
+    }
+
+    /**
+     * Construct a new Reverse, supplying the ResourceComparator to be reversed.
+     * @param c the ResourceComparator to reverse.
+     */
+    public Reverse(ResourceComparator c) {
+        add(c);
+    }
+
+    /**
+     * Add the ResourceComparator to reverse.
+     * @param c the ResourceComparator to add.
+     */
+    public void add(ResourceComparator c) {
+        if (nested != null) {
+            throw new BuildException(ONE_NESTED);
+        }
+        nested = c;
+        setChecked(false);
+    }
+
+    /**
+     * 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 greater than, equal to, or less than the second.
+     */
+    protected int resourceCompare(Resource foo, Resource bar) {
+        return -1 * (nested == null
+            ? foo.compareTo(bar) : nested.compare(foo, bar));
+    }
+
+    protected void dieOnCircularReference(Stack<Object> stk, Project p)
+        throws BuildException {
+        if (isChecked()) {
+            return;
+        }
+        if (isReference()) {
+            super.dieOnCircularReference(stk, p);
+        } else {
+            if (nested instanceof DataType) {
+                pushAndInvokeCircularReferenceCheck((DataType) nested, stk,
+                                                    p);
+            }
+            setChecked(true);
+        }
+    }
+}