1 files changed, 126 insertions, 0 deletions
diff --git a/src/share/classes/com/sun/org/apache/xml/internal/utils/ThreadControllerWrapper.java b/src/share/classes/com/sun/org/apache/xml/internal/utils/ThreadControllerWrapper.java
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index 0000000..2dc8782
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+++ b/src/share/classes/com/sun/org/apache/xml/internal/utils/ThreadControllerWrapper.java
@@ -0,0 +1,126 @@
+/*
+ * reserved comment block
+ * DO NOT REMOVE OR ALTER!
+ */
+/*
+ * Copyright 1999-2004 The Apache Software Foundation.
+ *
+ * Licensed 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.
+ */
+/*
+ * $Id: ThreadControllerWrapper.java,v 1.2.4.1 2005/09/15 08:15:59 suresh_emailid Exp $
+ */
+package com.sun.org.apache.xml.internal.utils;
+
+/**
+ * A utility class that wraps the ThreadController, which is used
+ * by IncrementalSAXSource for the incremental building of DTM.
+ */
+public class ThreadControllerWrapper
+{
+
+  /** The ThreadController pool   */
+  private static ThreadController m_tpool = new ThreadController();
+
+  public static Thread runThread(Runnable runnable, int priority)
+  {
+    return m_tpool.run(runnable, priority);
+  }
+
+  public static void waitThread(Thread worker, Runnable task)
+    throws InterruptedException
+  {
+    m_tpool.waitThread(worker, task);
+  }
+
+  /**
+   * Thread controller utility class for incremental SAX source. Must
+   * be overriden with a derived class to support thread pooling.
+   *
+   * All thread-related stuff is in this class.
+   */
+  public static class ThreadController
+  {
+
+    /**
+     * This class was introduced as a fix for CR 6607339.
+     */
+    final class SafeThread extends Thread {
+         private volatile boolean ran = false;
+
+         public SafeThread(Runnable target) {
+             super(target);
+         }
+
+         public final void run() {
+             if (Thread.currentThread() != this) {
+                 throw new IllegalStateException("The run() method in a"
+                     + " SafeThread cannot be called from another thread.");
+             }
+             synchronized (this) {
+                if (!ran) {
+                    ran = true;
+                }
+                else {
+                 throw new IllegalStateException("The run() method in a"
+                     + " SafeThread cannot be called more than once.");
+                 }
+             }
+             super.run();
+         }
+    }
+
+    /**
+     * Will get a thread from the pool, execute the task
+     *  and return the thread to the pool.
+     *
+     *  The return value is used only to wait for completion
+     *
+     *
+     * NEEDSDOC @param task
+     * @param priority if >0 the task will run with the given priority
+     *  ( doesn't seem to be used in xalan, since it's allways the default )
+     * @return  The thread that is running the task, can be used
+     *          to wait for completion
+     */
+    public Thread run(Runnable task, int priority)
+    {
+
+      Thread t = new SafeThread(task);
+
+      t.start();
+
+      //       if( priority > 0 )
+      //      t.setPriority( priority );
+      return t;
+    }
+
+    /**
+     *  Wait until the task is completed on the worker
+     *  thread.
+     *
+     * NEEDSDOC @param worker
+     * NEEDSDOC @param task
+     *
+     * @throws InterruptedException
+     */
+    public void waitThread(Thread worker, Runnable task)
+            throws InterruptedException
+    {
+
+      // This should wait until the transformThread is considered not alive.
+      worker.join();
+    }
+  }
+
+}