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author | Ashlee Young <ashlee@onosfw.com> | 2015-10-23 10:00:02 -0700 |
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committer | Ashlee Young <ashlee@onosfw.com> | 2015-10-23 10:00:02 -0700 |
commit | 753a6c60f47f3ac4f270005b65e9d6481de8eb68 (patch) | |
tree | 3d0a1ae3b4d994550f6614b417b991eee3eb8911 /framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/util/IdentityStack.java | |
parent | c62d20eb3b4620c06d833be06f50b2600d96dd42 (diff) |
Adding maven and ant source trees
Change-Id: I0a39b9add833a31b9c3f98d193983ae2f3a5a445
Signed-off-by: Ashlee Young <ashlee@onosfw.com>
Diffstat (limited to 'framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/util/IdentityStack.java')
-rw-r--r-- | framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/util/IdentityStack.java | 130 |
1 files changed, 130 insertions, 0 deletions
diff --git a/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/util/IdentityStack.java b/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/util/IdentityStack.java new file mode 100644 index 00000000..ac806d78 --- /dev/null +++ b/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/util/IdentityStack.java @@ -0,0 +1,130 @@ +/* + * 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.util; + +import java.util.Collection; +import java.util.HashSet; +import java.util.IdentityHashMap; +import java.util.Set; +import java.util.Stack; + +/** + * Identity Stack. + * @since Ant 1.7 + */ +public class IdentityStack<E> extends Stack<E> { + + private static final long serialVersionUID = -5555522620060077046L; + + /** + * Get an IdentityStack containing the contents of the specified Stack. + * @param s the Stack to copy; ignored if null. + * @return an IdentityStack instance. + */ + public static <E> IdentityStack<E> getInstance(Stack<E> s) { + if (s instanceof IdentityStack) { + return (IdentityStack<E>) s; + } + IdentityStack<E> result = new IdentityStack<E>(); + if (s != null) { + result.addAll(s); + } + return result; + } + + /** + * Default constructor. + */ + public IdentityStack() { + } + + /** + * Construct a new IdentityStack with the specified Object + * as the bottom element. + * @param o the bottom element. + */ + public IdentityStack(E o) { + super(); + push(o); + } + + /** + * Override methods that use <code>.equals()</code> comparisons on elements. + * @param o the Object to search for. + * @return true if the stack contains the object. + * @see java.util.Vector#contains(Object) + */ + public synchronized boolean contains(Object o) { + return indexOf(o) >= 0; + } + + /** + * Override methods that use <code>.equals()</code> comparisons on elements. + * @param o the Object to search for. + * @param pos the position from which to search. + * @return the position of the object, -1 if not found. + * @see java.util.Vector#indexOf(Object, int) + */ + public synchronized int indexOf(Object o, int pos) { + final int size = size(); + for (int i = pos; i < size; i++) { + if (get(i) == o) { + return i; + } + } + return -1; + } + + /** + * Override methods that use <code>.equals()</code> comparisons on elements. + * @param o the Object to search for. + * @param pos the position from which to search (backward). + * @return the position of the object, -1 if not found. + * @see java.util.Vector#indexOf(Object, int) + */ + public synchronized int lastIndexOf(Object o, int pos) { + for (int i = pos; i >= 0; i--) { + if (get(i) == o) { + return i; + } + } + return -1; + } + + public synchronized boolean removeAll(Collection<?> c) { + if (!(c instanceof Set)) { + c = new HashSet(c); + } + return super.removeAll(c); + } + + public synchronized boolean retainAll(Collection c) { + if (!(c instanceof Set)) { + c = new HashSet(c); + } + return super.retainAll(c); + } + + public synchronized boolean containsAll(Collection<?> c) { + IdentityHashMap map = new IdentityHashMap(); + for (Object e : this) { + map.put(e, Boolean.TRUE); + } + return map.keySet().containsAll(c); + } +} |