1 files changed, 0 insertions, 325 deletions
diff --git a/common/plugins/org.eclipse.jpt.common.utility/src/org/eclipse/jpt/common/utility/internal/SynchronizedStack.java b/common/plugins/org.eclipse.jpt.common.utility/src/org/eclipse/jpt/common/utility/internal/SynchronizedStack.java
deleted file mode 100644
index 17033fc574..0000000000
--- a/common/plugins/org.eclipse.jpt.common.utility/src/org/eclipse/jpt/common/utility/internal/SynchronizedStack.java
+++ /dev/null
@@ -1,325 +0,0 @@
-/*******************************************************************************
- * Copyright (c) 2007, 2009 Oracle. 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:
- *     Oracle - initial API and implementation
- ******************************************************************************/
-package org.eclipse.jpt.common.utility.internal;
-
-import java.io.Serializable;
-import java.util.EmptyStackException;
-
-import org.eclipse.jpt.common.utility.Command;
-
-/**
- * Thread-safe implementation of the {@link Stack} interface.
- * This also provides protocol for suspending a thread until the
- * stack is empty or not empty, with optional time-outs.
- */
-public class SynchronizedStack<E>
-	implements Stack<E>, Serializable
-{
-	/** Backing stack. */
-	private final Stack<E> stack;
-
-	/** Object to synchronize on. */
-	private final Object mutex;
-
-	private static final long serialVersionUID = 1L;
-
-
-	// ********** constructors **********
-
-	/**
-	 * Construct a synchronized stack that wraps the
-	 * specified stack and locks on the specified mutex.
-	 */
-	public SynchronizedStack(Stack<E> stack, Object mutex) {
-		super();
-		if (stack == null) {
-			throw new NullPointerException();
-		}
-		this.stack = stack;
-		this.mutex = mutex;
-	}
-
-	/**
-	 * Construct a synchronized stack that wraps the
-	 * specified stack and locks on itself.
-	 */
-	public SynchronizedStack(Stack<E> stack) {
-		super();
-		if (stack == null) {
-			throw new NullPointerException();
-		}
-		this.stack = stack;
-		this.mutex = this;
-	}
-
-	/**
-	 * Construct an empty synchronized stack that locks on the specified mutex.
-	 */
-	public SynchronizedStack(Object mutex) {
-		this(new SimpleStack<E>(), mutex);
-	}
-
-	/**
-	 * Construct an empty synchronized stack that locks on itself.
-	 */
-	public SynchronizedStack() {
-		this(new SimpleStack<E>());
-	}
-
-
-	// ********** Stack implementation **********
-
-	public void push(E element) {
-		synchronized (this.mutex) {
-			this.push_(element);
-		}
-	}
-
-	/**
-	 * Pre-condition: synchronized
-	 */
-	private void push_(E element) {
-		this.stack.push(element);
-		this.mutex.notifyAll();
-	}
-
-	public E pop() {
-		synchronized (this.mutex) {
-			return this.pop_();
-		}
-	}
-
-	/**
-	 * Pre-condition: synchronized
-	 */
-	private E pop_() {
-		E o = this.stack.pop();
-		this.mutex.notifyAll();
-		return o;
-	}
-
-	public E peek() {
-		synchronized (this.mutex) {
-			return this.stack.peek();
-		}
-	}
-
-	public boolean isEmpty() {
-		synchronized (this.mutex) {
-			return this.stack.isEmpty();
-		}
-	}
-
-
-	// ********** indefinite waits **********
-
-	/**
-	 * Suspend the current thread until the stack's empty status changes
-	 * to the specified value.
-	 */
-	public void waitUntilEmptyIs(boolean empty) throws InterruptedException {
-		synchronized (this.mutex) {
-			this.waitUntilEmptyIs_(empty);
-		}
-	}
-
-	/**
-	 * Pre-condition: synchronized
-	 */
-	private void waitUntilEmptyIs_(boolean empty) throws InterruptedException {
-		while (this.stack.isEmpty() != empty) {
-			this.mutex.wait();
-		}
-	}
-
-	/**
-	 * Suspend the current thread until the stack is empty.
-	 */
-	public void waitUntilEmpty() throws InterruptedException {
-		this.waitUntilEmptyIs(true);
-	}
-
-	/**
-	 * Suspend the current thread until the stack has something on it.
-	 */
-	public void waitUntilNotEmpty() throws InterruptedException {
-		this.waitUntilEmptyIs(false);
-	}
-
-	/**
-	 * Suspend the current thread until the stack is empty,
-	 * then "push" the specified item on to the top of the stack
-	 * and continue executing.
-	 */
-	public void waitToPush(E element) throws InterruptedException {
-		synchronized (this.mutex) {
-			this.waitUntilEmptyIs_(true);
-			this.push_(element);
-		}
-	}
-
-	/**
-	 * Suspend the current thread until the stack has something on it,
-	 * then "pop" an item from the top of the stack and return it.
-	 */
-	public Object waitToPop() throws InterruptedException {
-		synchronized (this.mutex) {
-			this.waitUntilEmptyIs_(false);
-			return this.pop_();
-		}
-	}
-
-
-	// ********** timed waits **********
-
-	/**
-	 * Suspend the current thread until the stack's empty status changes
-	 * to the specified value or the specified time-out occurs.
-	 * The time-out is specified in milliseconds. Return <code>true</code> if the specified
-	 * empty status was achieved; return <code>false</code> if a time-out occurred.
-	 * If the stack's empty status is already the specified value,
-	 * return <code>true</code> immediately.
-	 * If the time-out is zero, wait indefinitely.
-	 */
-	public boolean waitUntilEmptyIs(boolean empty, long timeout) throws InterruptedException {
-		synchronized (this.mutex) {
-			return this.waitUntilEmptyIs_(empty, timeout);
-		}
-	}
-
-	/**
-	 * Pre-condition: synchronized
-	 */
-	private boolean waitUntilEmptyIs_(boolean empty, long timeout) throws InterruptedException {
-		if (timeout == 0L) {
-			this.waitUntilEmptyIs_(empty);	// wait indefinitely until notified
-			return true;	// if it ever comes back, the condition was met
-		}
-
-		long stop = System.currentTimeMillis() + timeout;
-		long remaining = timeout;
-		while ((this.stack.isEmpty() != empty) && (remaining > 0L)) {
-			this.mutex.wait(remaining);
-			remaining = stop - System.currentTimeMillis();
-		}
-		return (this.stack.isEmpty() == empty);
-	}
-
-	/**
-	 * Suspend the current thread until the stack is empty
-	 * or the specified time-out occurs.
-	 * The time-out is specified in milliseconds. Return <code>true</code> if
-	 * the stack is empty; return <code>false</code> if a time-out occurred.
-	 * If the stack is already empty, return <code>true</code> immediately.
-	 * If the time-out is zero, wait indefinitely.
-	 */
-	public boolean waitUntilEmpty(long timeout) throws InterruptedException {
-		return this.waitUntilEmptyIs(true, timeout);
-	}
-
-	/**
-	 * Suspend the current thread until the stack has something on it.
-	 * or the specified time-out occurs.
-	 * The time-out is specified in milliseconds. Return <code>true</code> if
-	 * the stack is not empty; return <code>false</code> if a time-out occurred.
-	 * If the stack already has something on it, return <code>true</code> immediately.
-	 * If the time-out is zero, wait indefinitely.
-	 */
-	public boolean waitUntilNotEmpty(long timeout) throws InterruptedException {
-		return this.waitUntilEmptyIs(false, timeout);
-	}
-
-	/**
-	 * Suspend the current thread until the stack is empty,
-	 * then "push" the specified item on to the top of the stack
-	 * and continue executing. If the stack is not emptied out
-	 * before the time-out, simply continue executing without
-	 * "pushing" the item.
-	 * The time-out is specified in milliseconds. Return <code>true</code> if the
-	 * item was pushed; return <code>false</code> if a time-out occurred.
-	 * If the stack is already empty, "push" the specified item and
-	 * return <code>true</code> immediately.
-	 * If the time-out is zero, wait indefinitely.
-	 */
-	public boolean waitToPush(E element, long timeout) throws InterruptedException {
-		synchronized (this.mutex) {
-			boolean success = this.waitUntilEmptyIs_(true, timeout);
-			if (success) {
-				this.push_(element);
-			}
-			return success;
-		}
-	}
-
-	/**
-	 * Suspend the current thread until the stack has something on it,
-	 * then "pop" an item from the top of the stack and return it.
-	 * If the stack is empty and nothing is "pushed" on to it before the
-	 * time-out, throw an empty stack exception.
-	 * The time-out is specified in milliseconds.
-	 * If the stack is not empty, "pop" an item and
-	 * return it immediately.
-	 * If the time-out is zero, wait indefinitely.
-	 */
-	public Object waitToPop(long timeout) throws InterruptedException {
-		synchronized (this.mutex) {
-			boolean success = this.waitUntilEmptyIs_(false, timeout);
-			if (success) {
-				return this.pop_();
-			}
-			throw new EmptyStackException();
-		}
-	}
-
-
-	// ********** synchronized behavior **********
-
-	/**
-	 * If the current thread is not interrupted, execute the specified command 
-	 * with the mutex locked. This is useful for initializing the stack in another
-	 * thread.
-	 */
-	public void execute(Command command) throws InterruptedException {
-		if (Thread.interrupted()) {
-			throw new InterruptedException();
-		}
-		synchronized (this.mutex) {
-			command.execute();
-		}
-	}
-
-
-	// ********** additional public protocol **********
-
-	/**
-	 * Return the object the stack locks on while performing
-	 * its operations.
-	 */
-	public Object getMutex() {
-		return this.mutex;
-	}
-
-
-	// ********** standard methods **********
-
-	@Override
-	public String toString() {
-		synchronized (this.mutex) {
-			return '[' + this.stack.toString() + ']';
-		}
-	}
-
-	private void writeObject(java.io.ObjectOutputStream s) throws java.io.IOException {
-		synchronized (this.mutex) {
-			s.defaultWriteObject();
-		}
-	}
-
-}