1 files changed, 0 insertions, 279 deletions
diff --git a/jpa/plugins/org.eclipse.jpt.utility/src/org/eclipse/jpt/utility/internal/SynchronizedStack.java b/jpa/plugins/org.eclipse.jpt.utility/src/org/eclipse/jpt/utility/internal/SynchronizedStack.java
deleted file mode 100644
index e232c402ff..0000000000
--- a/jpa/plugins/org.eclipse.jpt.utility/src/org/eclipse/jpt/utility/internal/SynchronizedStack.java
+++ /dev/null
@@ -1,279 +0,0 @@
-/*******************************************************************************
- * Copyright (c) 2007, 2008 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.utility.internal;
-
-import java.io.Serializable;
-import java.util.EmptyStackException;
-import org.eclipse.jpt.utility.Command;
-
-/**
- * Thread-safe implementation of the 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 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();
-		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();
-		this.stack = stack;
-		this.mutex = this;
-	}
-
-	/**
-	 * Construct a synchronized stack that locks on the specified mutex.
-	 */
-	public SynchronizedStack(Object mutex) {
-		this(new SimpleStack<E>(), mutex);
-	}
-
-	/**
-	 * Construct a synchronized stack that locks on itself.
-	 */
-	public SynchronizedStack() {
-		this(new SimpleStack<E>());
-	}
-
-
-	// ********** Stack implementation **********
-
-	public void push(E o) {
-		synchronized (this.mutex) {
-			this.stack.push(o);
-			this.mutex.notifyAll();
-		}
-	}
-
-	public E pop() {
-		synchronized (this.mutex) {
-			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) {
-			while (this.isEmpty() != empty) {
-				this.mutex.wait();
-			}
-		}
-	}
-
-	/**
-	 * Suspend the current thread until the stack is empty.
-	 */
-	public void waitUntilEmpty() throws InterruptedException {
-		synchronized (this.mutex) {
-			this.waitUntilEmptyIs(true);
-		}
-	}
-
-	/**
-	 * Suspend the current thread until the stack has something on it.
-	 */
-	public void waitUntilNotEmpty() throws InterruptedException {
-		synchronized (this.mutex) {
-			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 o) throws InterruptedException {
-		synchronized (this.mutex) {
-			this.waitUntilEmpty();
-			this.push(o);
-		}
-	}
-
-	/**
-	 * 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.waitUntilNotEmpty();
-			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 true if the specified
-	 * value was achieved; return false if a time-out occurred.
-	 */
-	public boolean waitUntilEmptyIs(boolean empty, long timeout) throws InterruptedException {
-		synchronized (this.mutex) {
-			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.isEmpty() != empty) && (remaining > 0L)) {
-				this.mutex.wait(remaining);
-				remaining = stop - System.currentTimeMillis();
-			}
-			return (this.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 true if
-	 * the stack is empty; return false if a time-out occurred.
-	 */
-	public boolean waitUntilEmpty(long timeout) throws InterruptedException {
-		synchronized (this.mutex) {
-			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 true if
-	 * the stack has something on it; return false if a time-out occurred.
-	 */
-	public boolean waitUntilNotEmpty(long timeout) throws InterruptedException {
-		synchronized (this.mutex) {
-			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 true if the
-	 * item was pushed; return false if a time-out occurred.
-	 */
-	public boolean waitToPush(E o, long timeout) throws InterruptedException {
-		synchronized (this.mutex) {
-			boolean success = this.waitUntilEmpty(timeout);
-			if (success) {
-				this.push(o);
-			}
-			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.
-	 */
-	public Object waitToPop(long timeout) throws InterruptedException {
-		synchronized (this.mutex) {
-			boolean success = this.waitUntilNotEmpty(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 this object locks on while performing
-	 * its operations.
-	 */
-	public Object mutex() {
-		return this.mutex;
-	}
-
-
-	// ********** Object overrides **********
-
-	@Override
-	public String toString() {
-		synchronized (this.mutex) {
-			return this.stack.toString();
-		}
-	}
-
-}