1 files changed, 98 insertions, 0 deletions
diff --git a/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/types/resources/Sort.java b/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/types/resources/Sort.java
new file mode 100644
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--- /dev/null
+++ b/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/types/resources/Sort.java
@@ -0,0 +1,98 @@
+/*
+ *  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;
+
+import java.util.Collection;
+import java.util.Collections;
+import java.util.Iterator;
+import java.util.List;
+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;
+import org.apache.tools.ant.types.ResourceCollection;
+import org.apache.tools.ant.types.resources.comparators.DelegatedResourceComparator;
+import org.apache.tools.ant.types.resources.comparators.ResourceComparator;
+import org.apache.tools.ant.util.CollectionUtils;
+
+/**
+ * ResourceCollection that sorts another ResourceCollection.
+ *
+ * Note that Sort must not be used in cases where the ordering of the objects
+ * being sorted might change during the sorting process.
+ *
+ * @since Ant 1.7
+ */
+public class Sort extends BaseResourceCollectionWrapper {
+
+    private DelegatedResourceComparator comp = new DelegatedResourceComparator();
+
+    /**
+     * Sort the contained elements.
+     * @return a Collection of Resources.
+     */
+    protected synchronized Collection<Resource> getCollection() {
+        ResourceCollection rc = getResourceCollection();
+        Iterator<Resource> iter = rc.iterator();
+        if (!(iter.hasNext())) {
+            return Collections.emptySet();
+        }
+        List<Resource> result = (List<Resource>) CollectionUtils.asCollection(iter);
+        Collections.sort(result, comp);
+        return result;
+    }
+
+    /**
+     * Add a ResourceComparator to this Sort ResourceCollection.
+     * If multiple ResourceComparators are added, they will be processed in LIFO order.
+     * @param c the ResourceComparator to add.
+     */
+    public synchronized void add(ResourceComparator c) {
+        if (isReference()) {
+            throw noChildrenAllowed();
+        }
+        comp.add(c);
+        FailFast.invalidate(this);
+        setChecked(false);
+    }
+
+    /**
+     * Overrides the BaseResourceCollectionContainer version
+     * to recurse on nested ResourceComparators.
+     * @param stk the stack of data types to use (recursively).
+     * @param p   the project to use to dereference the references.
+     * @throws BuildException on error.
+     */
+    protected synchronized void dieOnCircularReference(Stack<Object> stk, Project p)
+        throws BuildException {
+        if (isChecked()) {
+            return;
+        }
+
+        // check nested collection
+        super.dieOnCircularReference(stk, p);
+
+        if (!isReference()) {
+            DataType.pushAndInvokeCircularReferenceCheck(comp, stk, p);
+            setChecked(true);
+        }
+    }
+
+}