/* * Copyright (c) 1997, 2004, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation.  Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle in the LICENSE file that accompanied this code. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ package java.beans.beancontext; import java.awt.Component;import java.awt.Container; import java.beans.Beans;import java.beans.AppletInitializer; import java.beans.DesignMode; import java.beans.PropertyChangeEvent;import java.beans.PropertyChangeListener;import java.beans.PropertyChangeSupport; import java.beans.VetoableChangeListener;import java.beans.VetoableChangeSupport;import java.beans.PropertyVetoException; import java.beans.Visibility; import java.io.IOException;import java.io.InputStream;import java.io.ObjectInputStream;import java.io.ObjectOutputStream;import java.io.Serializable; import java.net.URL; import java.util.ArrayList;import java.util.Collection;import java.util.HashMap;import java.util.Iterator;import java.util.Locale;import java.util.Map;  /** * This helper class provides a utility implementation of the * java.beans.beancontext.BeanContext interface. * </p> * <p> * Since this class directly implements the BeanContext interface, the class * can, and is intended to be used either by subclassing this implementation, * or via ad-hoc delegation of an instance of this class from another. * </p> * * @author Laurence P. G. Cable * @since 1.2 */public class      BeanContextSupport extends BeanContextChildSupport       implements BeanContext,                  Serializable,                  PropertyChangeListener,                  VetoableChangeListener {     // Fix for bug 4282900 to pass JCK regression test    static final long serialVersionUID = -4879613978649577204L;     /**     *     * Construct a BeanContextSupport instance     *     *     * @param peer      The peer <tt>BeanContext</tt> we are     *                  supplying an implementation for,     *                  or <tt>null</tt>     *                  if this object is its own peer     * @param lcle      The current Locale for this BeanContext. If     *                  <tt>lcle</tt> is <tt>null</tt>, the default locale     *                  is assigned to the <tt>BeanContext</tt> instance.     * @param dTime     The initial state,     *                  <tt>true</tt> if in design mode,     *                  <tt>false</tt> if runtime.     * @param visible   The initial visibility.     * @see java.util.Locale#getDefault()     * @see java.util.Locale#setDefault(java.util.Locale)     */    public BeanContextSupport(BeanContext peer, Locale lcle, boolean dTime, boolean visible) {        super(peer);         locale          = lcle != null ? lcle : Locale.getDefault();        designTime      = dTime;        okToUseGui      = visible;         initialize();    }     /**     * Create an instance using the specified Locale and design mode.     *     * @param peer      The peer <tt>BeanContext</tt> we     *                  are supplying an implementation for,     *                  or <tt>null</tt> if this object is its own peer     * @param lcle      The current Locale for this <tt>BeanContext</tt>. If     *                  <tt>lcle</tt> is <tt>null</tt>, the default locale     *                  is assigned to the <tt>BeanContext</tt> instance.     * @param dtime     The initial state, <tt>true</tt>     *                  if in design mode,     *                  <tt>false</tt> if runtime.     * @see java.util.Locale#getDefault()     * @see java.util.Locale#setDefault(java.util.Locale)     */    public BeanContextSupport(BeanContext peer, Locale lcle, boolean dtime) {        this (peer, lcle, dtime, true);    }     /**     * Create an instance using the specified locale     *     * @param peer      The peer BeanContext we are     *                  supplying an implementation for,     *                  or <tt>null</tt> if this object     *                  is its own peer     * @param lcle      The current Locale for this     *                  <tt>BeanContext</tt>. If     *                  <tt>lcle</tt> is <tt>null</tt>,     *                  the default locale     *                  is assigned to the <tt>BeanContext</tt>     *                  instance.     * @see java.util.Locale#getDefault()     * @see java.util.Locale#setDefault(java.util.Locale)     */    public BeanContextSupport(BeanContext peer, Locale lcle) {        this (peer, lcle, false, true);    }     /**     * Create an instance using with a default locale     *     * @param peer      The peer <tt>BeanContext</tt> we are     *                  supplying an implementation for,     *                  or <tt>null</tt> if this object     *                  is its own peer     */    public BeanContextSupport(BeanContext peer) {        this (peer, null, false, true);    }     /**     * Create an instance that is not a delegate of another object     */     public BeanContextSupport() {        this (null, null, false, true);    }     /**     * Gets the instance of <tt>BeanContext</tt> that     * this object is providing the implementation for.     * @return the BeanContext instance     */    public BeanContext getBeanContextPeer() { return (BeanContext)getBeanContextChildPeer(); }     /**     * <p>     * The instantiateChild method is a convenience hook     * in BeanContext to simplify     * the task of instantiating a Bean, nested,     * into a <tt>BeanContext</tt>.     * </p>     * <p>     * The semantics of the beanName parameter are defined by java.beans.Beans.instantate.     * </p>     *     * @param beanName the name of the Bean to instantiate within this BeanContext     * @throws IOException if there is an I/O error when the bean is being deserialized     * @throws ClassNotFoundException if the class     * identified by the beanName parameter is not found     * @return the new object     */    public Object instantiateChild(String beanName)           throws IOException, ClassNotFoundException {        BeanContext bc = getBeanContextPeer();         return Beans.instantiate(bc.getClass().getClassLoader(), beanName, bc);    }     /**     * Gets the number of children currently nested in     * this BeanContext.     *     * @return number of children     */    public int size() {        synchronized(children) {            return children.size();        }    }     /**     * Reports whether or not this     * <tt>BeanContext</tt> is empty.     * A <tt>BeanContext</tt> is considered     * empty when it contains zero     * nested children.     * @return if there are not children     */    public boolean isEmpty() {        synchronized(children) {            return children.isEmpty();        }    }     /**     * Determines whether or not the specified object     * is currently a child of this <tt>BeanContext</tt>.     * @param o the Object in question     * @return if this object is a child     */    public boolean contains(Object o) {        synchronized(children) {            return children.containsKey(o);        }    }     /**     * Determines whether or not the specified object     * is currently a child of this <tt>BeanContext</tt>.     * @param o the Object in question     * @return if this object is a child     */    public boolean containsKey(Object o) {        synchronized(children) {            return children.containsKey(o);        }    }     /**     * Gets all JavaBean or <tt>BeanContext</tt> instances     * currently nested in this <tt>BeanContext</tt>.     * @return an <tt>Iterator</tt> of the nested children     */    public Iterator iterator() {        synchronized(children) {            return new BCSIterator(children.keySet().iterator());        }    }     /**     * Gets all JavaBean or <tt>BeanContext</tt>     * instances currently nested in this BeanContext.     */    public Object[] toArray() {        synchronized(children) {            return children.keySet().toArray();        }    }     /**     * Gets an array containing all children of     * this <tt>BeanContext</tt> that match     * the types contained in arry.     * @param arry The array of object     * types that are of interest.     * @return an array of children     */    public Object[] toArray(Object[] arry) {        synchronized(children) {            return children.keySet().toArray(arry);        }    }      /************************************************************************/     /**     * protected final subclass that encapsulates an iterator but implements     * a noop remove() method.     */     protected static final class BCSIterator implements Iterator {        BCSIterator(Iterator i) { super(); src = i; }         public boolean hasNext() { return src.hasNext(); }        public Object  next()    { return src.next();    }        public void    remove()  { /* do nothing */      }         private Iterator src;    }     /************************************************************************/     /*     * protected nested class containing per child information, an instance     * of which is associated with each child in the "children" hashtable.     * subclasses can extend this class to include their own per-child state.     *     * Note that this 'value' is serialized with the corresponding child 'key'     * when the BeanContextSupport is serialized.     */     protected class BCSChild implements Serializable {     private static final long serialVersionUID = -5815286101609939109L;         BCSChild(Object bcc, Object peer) {            super();             child     = bcc;            proxyPeer = peer;        }         Object  getChild()                  { return child; }         void    setRemovePending(boolean v) { removePending = v; }         boolean isRemovePending()           { return removePending; }         boolean isProxyPeer()               { return proxyPeer != null; }         Object  getProxyPeer()              { return proxyPeer; }        /*         * fields         */          private           Object   child;        private           Object   proxyPeer;         private transient boolean  removePending;    }     /**     * <p>     * Subclasses can override this method to insert their own subclass     * of Child without having to override add() or the other Collection     * methods that add children to the set.     * </p>     *     * @param targetChild the child to create the Child on behalf of     * @param peer        the peer if the tragetChild and the peer are related by an implementation of BeanContextProxy     */     protected BCSChild createBCSChild(Object targetChild, Object peer) {        return new BCSChild(targetChild, peer);    }     /************************************************************************/     /**     * Adds/nests a child within this <tt>BeanContext</tt>.     * <p>     * Invoked as a side effect of java.beans.Beans.instantiate().     * If the child object is not valid for adding then this method     * throws an IllegalStateException.     * </p>     *     *     * @param targetChild The child objects to nest     * within this <tt>BeanContext</tt>     * @return true if the child was added successfully.     * @see #validatePendingAdd     */    public boolean add(Object targetChild) {         if (targetChild == null) throw new IllegalArgumentException();         // The specification requires that we do nothing if the child        // is already nested herein.         if (children.containsKey(targetChild)) return false; // test before locking         synchronized(BeanContext.globalHierarchyLock) {            if (children.containsKey(targetChild)) return false; // check again             if (!validatePendingAdd(targetChild)) {                throw new IllegalStateException();            }              // The specification requires that we invoke setBeanContext() on the            // newly added child if it implements the java.beans.beancontext.BeanContextChild interface             BeanContextChild cbcc  = getChildBeanContextChild(targetChild);            BeanContextChild  bccp = null;             synchronized(targetChild) {                 if (targetChild instanceof BeanContextProxy) {                    bccp = ((BeanContextProxy)targetChild).getBeanContextProxy();                     if (bccp == null) throw new NullPointerException("BeanContextPeer.getBeanContextProxy()");                }                 BCSChild bcsc  = createBCSChild(targetChild, bccp);                BCSChild pbcsc = null;                 synchronized (children) {                    children.put(targetChild, bcsc);                     if (bccp != null) children.put(bccp, pbcsc = createBCSChild(bccp, targetChild));                }                 if (cbcc != null) synchronized(cbcc) {                    try {                        cbcc.setBeanContext(getBeanContextPeer());                    } catch (PropertyVetoException pve) {                         synchronized (children) {                            children.remove(targetChild);                             if (bccp != null) children.remove(bccp);                        }                         throw new IllegalStateException();                    }                     cbcc.addPropertyChangeListener("beanContext", childPCL);                    cbcc.addVetoableChangeListener("beanContext", childVCL);                }                 Visibility v = getChildVisibility(targetChild);                 if (v != null) {                    if (okToUseGui)                        v.okToUseGui();                    else                        v.dontUseGui();                }                 if (getChildSerializable(targetChild) != null) serializable++;                 childJustAddedHook(targetChild, bcsc);                 if (bccp != null) {                    v = getChildVisibility(bccp);                     if (v != null) {                        if (okToUseGui)                            v.okToUseGui();                        else                            v.dontUseGui();                    }                     if (getChildSerializable(bccp) != null) serializable++;                     childJustAddedHook(bccp, pbcsc);                }              }             // The specification requires that we fire a notification of the change             fireChildrenAdded(new BeanContextMembershipEvent(getBeanContextPeer(), bccp == null ? new Object[] { targetChild } : new Object[] { targetChild, bccp } ));         }         return true;    }     /**     * Removes a child from this BeanContext.  If the child object is not     * for adding then this method throws an IllegalStateException.     * @param targetChild The child objects to remove     * @see #validatePendingRemove     */    public boolean remove(Object targetChild) {        return remove(targetChild, true);    }     /**     * internal remove used when removal caused by     * unexpected <tt>setBeanContext</tt> or     * by <tt>remove()</tt> invocation.     * @param targetChild the JavaBean, BeanContext, or Object to be removed     * @param callChildSetBC used to indicate that     * the child should be notified that it is no     * longer nested in this <tt>BeanContext</tt>.     */    protected boolean remove(Object targetChild, boolean callChildSetBC) {         if (targetChild == null) throw new IllegalArgumentException();         synchronized(BeanContext.globalHierarchyLock) {

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