diff options
Diffstat (limited to 'framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/types/resources/Sort.java')
-rw-r--r-- | framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/types/resources/Sort.java | 98 |
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 index 00000000..b4dc88c2 --- /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); + } + } + +} |