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// This Source Code is in the Public Domain per: http://litesoft.org/License.txt package org.litesoft.render; import java.util.*; import org.litesoft.core.typeutils.*; import org.litesoft.logger.*; public abstract class RenderHelperProcess { public static final RenderHelperProcess[] EMPTY_ARRAY = new RenderHelperProcess[0]; protected static final Logger LOGGER = LoggerFactory.getLogger( RenderHelperProcess.class ); private int mSequenceID = getNextSequence(); protected final String mName; protected final RenderHelper mRenderHelper; protected RenderHelperProcess( String pName, RenderHelper pRenderHelper ) { mName = pName; mRenderHelper = pRenderHelper; } protected RenderHelperProcess( String pName ) { this( pName, null ); } public final void addCallback( RenderHelperCallback pCallback ) { if ( pCallback != null ) { synchronized ( mCallbacks ) { mCallbacks.add( pCallback ); // System.out.println( this + " addCallback to " + pCallback ); } } } private final Set<RenderHelperCallback> mCallbacks = new HashSet<RenderHelperCallback>(); private RenderProcessResult notifyCallbacks_processComplete( RenderProcessResult pRenderProcessResult ) { mActive = false; RenderHelperCallback[] zCallbacks = null; synchronized ( mCallbacks ) { if ( !mCallbacks.isEmpty() ) { // System.out.println( this + " notifyCallbacks: " + mCallbacks ); zCallbacks = mCallbacks.toArray( new RenderHelperCallback[mCallbacks.size()] ); mCallbacks.clear(); } } if ( zCallbacks != null ) { for ( RenderHelperCallback zCallback : zCallbacks ) { // System.out.println( this + " calling back: " + zCallback ); zCallback.processCompleted( this, pRenderProcessResult ); } } return pRenderProcessResult; } private volatile boolean mActive = false; public boolean isActive() { return mActive; } public void activate() { mActive = true; } public final RenderProcessResult process() { // System.out.println( "process: " + this ); RenderProcessResult zProcessResult; if ( !mRenderHelper.isParticipatingInRendering() ) { zProcessResult = RenderProcessResult.Terminated; } else if ( !LLisProcessingNeeded() ) { zProcessResult = RenderProcessResult.Completed; } else { zProcessResult = LLprocess(); } // System.out.println( " --> " + this + " --> " + zProcessResult + "\n" ); switch ( zProcessResult ) { case Requeued: return zProcessResult; case Completed: break; case Terminated: break; } return notifyCallbacks_processComplete( zProcessResult ); } /** * Low Level Processing for this process. * <p/> * Note: For some Ui Infrastructures it may need to be synchronized. */ abstract protected RenderProcessResult LLprocess(); protected boolean isProcessingNeeded() { if ( mRenderHelper.isParticipatingInRendering() ) { if ( LLisProcessingNeeded() ) { return true; } } return false; } abstract protected boolean LLisProcessingNeeded(); protected final synchronized MySubProcessCallback getMySubProcessCallback() { return (mMySubProcessCallback != null) ? // mMySubProcessCallback : // (mMySubProcessCallback = new MySubProcessCallback()); } private MySubProcessCallback mMySubProcessCallback = null; private class MySubProcessCallback implements RenderHelperCallback { public void processCompleted( RenderHelperProcess pCompletedProcess, RenderProcessResult pCompletedProcessResult ) { process(); } } public String toString() { String zType = getTypeName(); if ( mRenderHelper == null ) { if ( (mName == null) ) { return zType; } return zType + "-" + mName + "-?"; } return zType + "-" + mRenderHelper; } protected String getTypeName() { return Objects.justClassName( getClass() ) + "-" + mSequenceID; } protected static RenderProcessResult defer( RenderHelperProcess pProcessToDefer, int pForMillisecs ) { RenderProcessManager.INSTANCE.defer( pProcessToDefer, pForMillisecs ); return RenderProcessResult.Requeued; } private static int sSequenceSource = 0; private static synchronized int getNextSequence() { return ++sSequenceSource; } } |