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Diffstat (limited to 'bundles/org.eclipse.jst.jsp.core/src/org/eclipse/jst/jsp/core/internal/java/StackMap.java')
-rw-r--r--bundles/org.eclipse.jst.jsp.core/src/org/eclipse/jst/jsp/core/internal/java/StackMap.java158
1 files changed, 0 insertions, 158 deletions
diff --git a/bundles/org.eclipse.jst.jsp.core/src/org/eclipse/jst/jsp/core/internal/java/StackMap.java b/bundles/org.eclipse.jst.jsp.core/src/org/eclipse/jst/jsp/core/internal/java/StackMap.java
deleted file mode 100644
index 24126871d2..0000000000
--- a/bundles/org.eclipse.jst.jsp.core/src/org/eclipse/jst/jsp/core/internal/java/StackMap.java
+++ /dev/null
@@ -1,158 +0,0 @@
-/*******************************************************************************
- * Copyright (c) 2007 IBM Corporation and others.
- * All rights reserved. This program and the accompanying materials
- * are made available under the terms of the Eclipse Public License v1.0
- * which accompanies this distribution, and is available at
- * http://www.eclipse.org/legal/epl-v10.html
- *
- * Contributors:
- * IBM Corporation - initial API and implementation
- *
- *******************************************************************************/
-package org.eclipse.jst.jsp.core.internal.java;
-
-import java.util.Collection;
-import java.util.HashMap;
-import java.util.Iterator;
-import java.util.LinkedList;
-import java.util.Map;
-import java.util.Stack;
-
-/**
- * @author nitin
- *
- */
-class StackMap {
-
- private Map fInternalMap = null;
-
- public StackMap() {
- fInternalMap = new HashMap();
- }
-
- /**
- * Removes all mappings from this StackMap
- */
- public void clear() {
- fInternalMap.clear();
- }
-
- /**
- * Returns the most recently pushed value to which this map maps the
- * specified key. Returns <tt>null</tt> if the map contains no mapping
- * for this key.
- *
- * @param key
- * key whose associated value is to be returned.
- * @return the most recently put value to which this map maps the
- * specified key, or <tt>null</tt> if the map contains no
- * mapping for this key.
- */
- public Object peek(Object key) {
- Stack stack = (Stack) fInternalMap.get(key);
- if (stack != null) {
- Object o = stack.peek();
- if (stack.isEmpty()) {
- fInternalMap.remove(key);
- }
- return o;
- }
- return null;
- }
-
- /**
- * Associates the specified value with the specified key in this map. If
- * the map previously contained a mapping for this key, the old value is
- * pushed onto the top of this key's private stack.
- *
- * @param key
- * key with which the specified value is to be associated.
- * @param value
- * value to be associated with the specified key.
- * @return newest value associated with specified key
- *
- * @throws UnsupportedOperationException
- * if the <tt>put</tt> operation is not supported by this
- * StackMap.
- * @throws ClassCastException
- * if the class of the specified key or value prevents it from
- * being stored in this StackMap.
- * @throws IllegalArgumentException
- * if some aspect of this key or value prevents it from being
- * stored in this StackMap.
- * @throws NullPointerException,
- * as this map does not permit <tt>null</tt> keys or values
- */
- public Object push(Object key, Object value) {
- Stack stack = (Stack) fInternalMap.get(key);
- if (stack == null) {
- stack = new Stack();
- fInternalMap.put(key, stack);
- }
- Object o = stack.push(value);
- return o;
- }
-
- /**
- * Removes the most-recent mapping for this key from this StackMap if it
- * is present.
- *
- * <p>
- * Returns the value to which the map previously associated the key, or
- * <tt>null</tt> if the map contained no mapping for this key. The map
- * will not contain a mapping for the specified key once the call returns.
- *
- * @param key
- * key whose stack is to be popped
- * @return most-recently pushed value associated with specified key, or
- * <tt>null</tt> if there was no mapping for key.
- *
- * @throws ClassCastException
- * if the key is of an inappropriate type for this map.
- * @throws NullPointerException
- * if the key is <tt>null</tt> as this class does not permit
- * <tt>null</tt> keys
- */
- public Object pop(Object key) {
- Stack stack = (Stack) fInternalMap.get(key);
- if (stack != null) {
- Object o = stack.pop();
- if (stack.isEmpty()) {
- fInternalMap.remove(key);
- }
- return o;
- }
- return null;
- }
-
- /**
- * Returns the number of entries in this StackMap, the sum of the sizes of
- * every remembered stack.
- *
- * @return the number of entries in this map.
- */
- int size() {
- int size = 0;
- Iterator i = fInternalMap.values().iterator();
- while (i.hasNext()) {
- Collection c = (Collection) i.next();
- size += c.size();
- }
- return size;
- }
-
- /**
- * Returns all of the values of this StackMap.
- *
- * @return the values of every Stack within this StackMap.
- */
- Collection values() {
- Collection values = new LinkedList();
- Iterator i = fInternalMap.values().iterator();
- while (i.hasNext()) {
- Collection c = (Collection) i.next();
- values.addAll(c);
- }
- return values;
- }
-}

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