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// This Source Code is in the Public Domain per: http://litesoft.org/License.txt package org.litesoft.core.delayed.nonpublic; import org.litesoft.core.delayed.*; import org.litesoft.core.typeutils.*; public class DoubleLinkedListTimedRunnableNode { private DoubleLinkedListTimedRunnableNode mPrev = null; private DoubleLinkedListTimedRunnableNode mNext = null; private long mRunWhen; private TimedRunnable mTimedRunnable; private DoubleLinkedListTimedRunnableNode( long pRunWhen, TimedRunnable pTimedRunnable ) { mRunWhen = pRunWhen; Objects.assertNotNull( "TimedRunnable", mTimedRunnable = pTimedRunnable ); } public long getRunWhen() { return mRunWhen; } public TimedRunnable getTimedRunnable() { return mTimedRunnable; } /** * Remove 'this' from DoubleLinkList * * @return mNext */ public DoubleLinkedListTimedRunnableNode remove() { // x - this - y DoubleLinkedListTimedRunnableNode 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; } private boolean isBefore( DoubleLinkedListTimedRunnableNode pTimerNode ) { return (pTimerNode != null) && (this.mRunWhen < pTimerNode.mRunWhen); } /** * Insert 'pNewTimerNode' before 'this' in the LinkList * * @param pNewTimerNode may NOT have its links set * * @return pNewTimerNode */ private DoubleLinkedListTimedRunnableNode insertBeforeMe( DoubleLinkedListTimedRunnableNode 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 */ private void insertAfterMe( DoubleLinkedListTimedRunnableNode 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( DoubleLinkedListTimedRunnableNode 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 DoubleLinkedListTimedRunnableNode addTo( DoubleLinkedListTimedRunnableNode pCurrent, long pRunWhen, TimedRunnable pTimedRunnable ) { if ( pTimedRunnable != null ) { DoubleLinkedListTimedRunnableNode zNewNode = new DoubleLinkedListTimedRunnableNode( pRunWhen, pTimedRunnable ); if ( pCurrent == null ) { return zNewNode; } if ( zNewNode.isBefore( pCurrent ) ) { return pCurrent.insertBeforeMe( zNewNode ); } DoubleLinkedListTimedRunnableNode cur = pCurrent; while ( cur.mNext != null ) { cur = cur.mNext; if ( zNewNode.isBefore( cur ) ) { cur.insertBeforeMe( zNewNode ); return pCurrent; } } cur.insertAfterMe( zNewNode ); } return pCurrent; } public static DoubleLinkedListTimedRunnableNode locate( DoubleLinkedListTimedRunnableNode pCurrent, TimedRunnable pTimedRunnable ) { if ( pTimedRunnable != null ) { while ( pCurrent != null ) { if ( pTimedRunnable == pCurrent.mTimedRunnable ) { return pCurrent; } pCurrent = pCurrent.mNext; } } return null; } } |