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// This Source Code is in the Public Domain per: http://litesoft.org/License.txt package org.litesoft.GWT.eventbus.client.nonpublic; import org.litesoft.GWT.eventbus.client.*; import org.litesoft.core.simpletypes.temporal.*; public class TimerNode { private TimerNode mPrev = null; private TimerNode mNext = null; private long mFireWhen; private int mClientIdNumber; private EventPackage mParcel; public TimerNode( int pFireInMilliSecs, int pClientIdNumber, EventPackage pPackage ) { long now = MillisecTimeSource.INSTANCE.now(); mFireWhen = now + pFireInMilliSecs; mClientIdNumber = pClientIdNumber; if ( null == (mParcel = pPackage) ) { throw new IllegalArgumentException( "Parcel may not be null" ); } } public long getFireWhen() { return mFireWhen; } public int getClientIdNumber() { return mClientIdNumber; } public EventPackage getParcel() { return mParcel; } public boolean isBefore( TimerNode pTimerNode ) { return (pTimerNode != null) && (this.mFireWhen < pTimerNode.mFireWhen); } /** * Remove 'this' from LinkList * * @return mNext */ public TimerNode remove() { // x - this - y TimerNode rv = this.mNext; if ( this.mPrev != null ) { mPrev.mNext = this.mNext; } if ( this.mNext != null ) { mNext.mPrev = this.mPrev; } mPrev = mNext = null; // x - y return rv; } /** * Insert 'pNewTimerNode' before 'this' in the LinkList * * @param pNewTimerNode may NOT have its links set * * @return pNewTimerNode */ public TimerNode insertBeforeMe( TimerNode pNewTimerNode ) { // x - this - y if ( chk( pNewTimerNode ) ) { pNewTimerNode.mNext = this; pNewTimerNode.mPrev = this.mPrev; if ( this.mPrev != null ) { this.mPrev.mNext = pNewTimerNode; } this.mPrev = pNewTimerNode; } // x - pNewTimerNode - this - y return pNewTimerNode; } /** * Insert 'pNewTimerNode' after 'this' in the LinkList * * @param pNewTimerNode may NOT have its links set */ public void insertAfterMe( TimerNode pNewTimerNode ) { // x - this - y if ( chk( pNewTimerNode ) ) { pNewTimerNode.mNext = this.mNext; if ( this.mNext != null ) { this.mNext.mPrev = pNewTimerNode; } this.mNext = pNewTimerNode; pNewTimerNode.mPrev = this; } // x - this - pNewTimerNode - y } private boolean chk( TimerNode pNewTimerNode ) { if ( pNewTimerNode == null ) { return false; } if ( (pNewTimerNode.mPrev != null) || (pNewTimerNode.mNext != null) ) { throw new IllegalArgumentException( "NewTimerNode has non-Null links" ); } return true; } /** * @return the New Head */ public static TimerNode addTo( TimerNode pCurrentHead, TimerNode pNewTimerNode ) { if ( pNewTimerNode == null ) { return pCurrentHead; } if ( pCurrentHead == null ) { return pNewTimerNode; } if ( pNewTimerNode.isBefore( pCurrentHead ) ) { return pCurrentHead.insertBeforeMe( pNewTimerNode ); } TimerNode cur = pCurrentHead; while ( cur.mNext != null ) { cur = cur.mNext; if ( pNewTimerNode.isBefore( cur ) ) { cur.insertBeforeMe( pNewTimerNode ); return pCurrentHead; } } cur.insertAfterMe( pNewTimerNode ); return pCurrentHead; } } |