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// This Source Code is in the Public Domain per: http://litesoft.org/License.txt package org.litesoft.aokeyhole.objects.support; import java.util.*; import org.litesoft.util.*; public abstract class AbstractDataMetaData extends AbstractMetaData implements Changeable { private Mode mMode; private boolean mEditable; private int mChangeCounter = 0; private int mLastChangeCounter = 0; private CopyOnWriteUniqueIdentityListManager<ChangeCallback> mChangeCallbacks = new CopyOnWriteUniqueIdentityListManager<ChangeCallback>(); public AbstractDataMetaData( String pMetaDataType, Mode pMode, boolean pEditable ) { super( pMetaDataType ); mMode = pMode; mEditable = pEditable; } @Override public List<ChangeCallback> getChangeCallbacks() { return mChangeCallbacks.getAll(); } @Override public void removeAllChangeCallbacks() { mChangeCallbacks.removeAll(); } @Override public boolean add( ChangeCallback pChangeCallback ) { return mChangeCallbacks.add( pChangeCallback ); } @Override public boolean remove( ChangeCallback pChangeCallback ) { return mChangeCallbacks.remove( pChangeCallback ); } protected void LLchanged() { // System.out.println( getClass().getSimpleName() + ".LLchanged" ); mChangeCounter++; notifyCallbacks(); } @Override public void clearChangeIndicators() { if ( isChanged() ) { // System.out.println( getClass().getSimpleName() + ".clearChangeIndicators" ); mChangeCounter = mLastChangeCounter = 0; notifyCallbacks(); } } @Override public boolean isChanged() { return (mChangeCounter != 0); } @Override public boolean chkChanged() { if ( mChangeCounter == mLastChangeCounter ) { return false; } mLastChangeCounter = mChangeCounter; return true; } @Override public void changed() { if ( !Mode.Rehydrating.equals( getMode() ) ) { LLchanged(); } } private void notifyCallbacks() { List<ChangeCallback> zCallbacks = mChangeCallbacks.getAll(); for ( ChangeCallback zCallback : zCallbacks ) { zCallback.changeStateUpdated( this ); } } public void setNewSaved() { mMode = Mode.Ready; } public void setRehydrated() { mMode = Mode.Ready; } public Mode getMode() { return mMode; } public boolean isEditable() { return mEditable; } protected void verifyEditability() { checkBadMode( Mode.Rehydrating.equals( getMode() ) ); if ( !isEditable() ) { throw new IllegalStateException( getMetaDataType() + " is NOT Editable" ); } } /** * @return null or Error */ public String validatePersistable() { return null; } protected void chkUnhappyCase( String pNullOrError ) { if ( pNullOrError != null ) { throw new IllegalStateException( pNullOrError ); } } protected void checkBadMode( boolean pBadMode ) { if ( pBadMode ) { throw new IllegalStateException( getMetaDataType() + " is still in " + getMode() + " Mode" ); } } } |