litesoft
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// This Source Code is in the Public Domain per: http://unlicense.org package org.litesoft.GWT.client.command.queue; import com.google.gwt.user.client.*; import java.util.*; /** * The subclass is responsible for starting the queue once a command has been * added and determining how each run cycle is scheduled. */ public abstract class CommandQueueBase implements SourcesCommandQueueEvents { private final ArrayList<CommandQueueListener> mListeners = new ArrayList<CommandQueueListener>(); private final ArrayList<Command> mQueue = new ArrayList<Command>(); @Override public void addListener( CommandQueueListener pListener ) { mListeners.add( pListener ); } @Override public void removeListener( CommandQueueListener pListener ) { mListeners.remove( pListener ); } public boolean hasNext() { return mQueue.size() > 0; } /** * Get the command at the specified index. <code>0</code> is the next * command to be executed. * * @param pIndex * * @return the command * * @throws IndexOutOfBoundsException if <code>index < 0 || index > {@link #getSize()}</code> */ public Command get( int pIndex ) { return mQueue.get( pIndex ); } public Command remove( int pIndex ) { return mQueue.remove( pIndex ); } public void clear() { mQueue.clear(); } public int getSize() { return mQueue.size(); } public abstract void add( Command pCommand ); protected boolean addImpl( Command pCommand ) { // Debug.println("CommandQueue.addImpl(" + command + ')'); if ( !fireBeforeCommandAdded( pCommand ) ) { return false; } mQueue.add( pCommand ); fireAfterCommandAdded( pCommand ); return true; } protected abstract void scheduleRunIteration(); protected void run() { // Debug.println("CommandQueue.run()"); executeCommand( mQueue.remove( 0 ) ); if ( hasNext() ) { scheduleRunIteration(); } } /** * Notifies listeners and executes the specified command. * <ul> * <li>pre: the command has been removed from the queue</li> * <li>post: the queue may have be modified</li> * </ul> * * @param pCommand */ protected void executeCommand( Command pCommand ) { // Debug.println("CommandQueue.executeCommand(" + command + ")"); if ( !fireBeforeCommandExecuted( pCommand ) ) { return; } executeCommandImpl( pCommand ); fireAfterCommandExecuted( pCommand ); } protected void executeCommandImpl( Command pCommand ) { pCommand.execute(); } protected boolean fireBeforeCommandAdded( Command pCommand ) { if ( mListeners.size() == 0 ) { return true; } boolean result = true; Object[] listeners = mListeners.toArray(); for ( Object listener : listeners ) { result &= ((CommandQueueListener) listener).beforeCommandAdded( this, pCommand ); } return result; } protected void fireAfterCommandAdded( Command pCommand ) { if ( mListeners.size() == 0 ) { return; } Object[] listeners = mListeners.toArray(); for ( Object listener : listeners ) { ((CommandQueueListener) listener).afterCommandAdded( this, pCommand ); } } protected boolean fireBeforeCommandExecuted( Command pCommand ) { if ( mListeners.size() == 0 ) { return true; } boolean result = true; Object[] listeners = mListeners.toArray(); for ( Object listener : listeners ) { result &= ((CommandQueueListener) listener).beforeCommandExecuted( this, pCommand ); } return result; } protected void fireAfterCommandExecuted( Command pCommand ) { if ( mListeners.size() == 0 ) { return; } Object[] listeners = mListeners.toArray(); for ( Object listener : listeners ) { ((CommandQueueListener) listener).afterCommandExecuted( this, pCommand ); } } @Override public String toString() { return "CommandQueueBase" + mQueue.toString(); } } |
Commits for litesoft/trunk/Java/GWT/Client/src/org/litesoft/GWT/client/command/queue/CommandQueueBase.java
Revision | Author | Commited | Message |
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950 Diff | GeorgeS | Thu 19 Jun, 2014 17:57:04 +0000 | New Lines |
948 Diff | GeorgeS | Sat 07 Jun, 2014 23:42:39 +0000 | Jusefuls Formatter Updated to New Code Format |
947 Diff | GeorgeS | Fri 06 Jun, 2014 23:36:56 +0000 | Correct Spelling of package! |
49 Diff | GeorgeS | Mon 12 Apr, 2010 02:59:10 +0000 | License Text |
23 Diff | GeorgeS | Wed 24 Feb, 2010 00:34:32 +0000 | |
2 | GeorgeS | Sun 07 Feb, 2010 12:50:58 +0000 |