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litesoft / trunk / GWT_Sandbox / MultiModuleSingleSrc / main / src / org / litesoft / sandbox / multimodule / client / common / util / StyledSafeTextMessageUserSink.java
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package org.litesoft.sandbox.multimodule.client.common.util; import java.util.*; import org.litesoft.sandbox.multimodule.anywhere.util.*; public class StyledSafeTextMessageUserSink implements MessageUserSink { private final Manager mManager = new Manager(); private final StyledSafeTextSink mSafeTextSink; private PriorityMessage mCurrentMessage; public StyledSafeTextMessageUserSink( StyledSafeTextSink pSafeTextSink ) { mSafeTextSink = pSafeTextSink; } @Override public void clearMessage() { Priority zNextPriority = mManager.getNextPriority(); if ( !optionallyUpdateCurrentMessage( zNextPriority ) ) { removeCurrentMessageStyle(); mCurrentMessage = null; if ( !optionallyUpdateCurrentMessage( zNextPriority ) ) { setMessageAndStyle( "", Priority.Info ); } } } @Override public void clearMessage( String pMessage ) { if ( mCurrentMessage != null && mCurrentMessage.hasMessage( pMessage ) ) { clearMessage(); return; } mManager.removeMessage( pMessage ); } @Override public void setInfoMessage( String pMessage ) { optionallyUpdateCurrentMessage( mManager.addMessage( Priority.Info, pMessage ) ); } @Override public void setWarningMessage( String pMessage ) { optionallyUpdateCurrentMessage( mManager.addMessage( Priority.Warning, pMessage ) ); } @Override public void setErrorMessage( String pMessage ) { optionallyUpdateCurrentMessage( mManager.addMessage( Priority.Error, pMessage ) ); } @Override public void setErrorMessage( Throwable pThrowable, String pMessage ) { if ( pThrowable != null ) { System.err.println( "vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv" ); System.err.println( pMessage ); pThrowable.printStackTrace(); System.err.println( "^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^" ); } setErrorMessage( pMessage ); } /** * @param pNextHighestPriority null OK - means no more messages - Don't update * * @return true if updated the the Current Message */ private boolean optionallyUpdateCurrentMessage( Priority pNextHighestPriority ) { if ( pNextHighestPriority != null ) { Priority zCurrentPriority = getCurrentMessagePriority(); if ( zCurrentPriority == null || zCurrentPriority.isLowerPriorityThan( pNextHighestPriority ) ) { removeCurrentMessageStyle(); mCurrentMessage = mManager.getNextMessage(); setMessageAndStyle( mCurrentMessage.getMessage(), mCurrentMessage.getPriority() ); return true; } } return false; } private void removeCurrentMessageStyle() { Priority zCurrentStyle = Priority.deNull( getCurrentMessagePriority() ); mSafeTextSink.removeStyleName( zCurrentStyle.name() ); } private void setMessageAndStyle( String pMessage, Priority pPriority ) { mSafeTextSink.addStyleName( pPriority.name() ); mSafeTextSink.setText( pMessage ); } private Priority getCurrentMessagePriority() { return (mCurrentMessage != null) ? mCurrentMessage.getPriority() : null; } private static class PriorityMessage { private Priority mPriority; private String mMessage; public PriorityMessage( Priority pPriority, String pMessage ) { mPriority = pPriority; mMessage = pMessage; } public Priority getPriority() { return mPriority; } public String getMessage() { return mMessage; } public boolean isLowerPriorityThan( Priority pPriority ) { return mPriority.isLowerPriorityThan( pPriority ); } public boolean hasMessage( String pMessage ) { return mMessage.equals( pMessage ); } } private static class Manager { private final List<String>[] mMessagesByPriority = cast( new List[Priority.values().length] ); { for ( int i = 0; i < mMessagesByPriority.length; i++ ) { mMessagesByPriority[i] = new ArrayList<String>(); } } /** * Get the Next Message (with the Highest Priority) * * @return null means no more messages */ public Priority getNextPriority() { for ( Priority zPriority : Priority.values() ) { if ( !mMessagesByPriority[zPriority.ordinal()].isEmpty() ) { return zPriority; } } return null; } /** * Get the Next Message (with the Highest Priority) * * @return null means no more messages */ public PriorityMessage getNextMessage() { for ( Priority zPriority : Priority.values() ) { List<String> zMessages = mMessagesByPriority[zPriority.ordinal()]; if ( !zMessages.isEmpty() ) { return new PriorityMessage( zPriority, zMessages.remove( 0 ) ); } } return null; } /** * Add a new Message. * * @return The Highest Priority Message's Priority OR null if no Messages waiting */ public Priority addMessage( Priority pPriority, String pMessage ) { if ( null != (pMessage = UtilsCommon.noEmpty( pMessage )) ) { mMessagesByPriority[Priority.deNull( pPriority ).ordinal()].add( pMessage ); } for ( Priority zPriority : Priority.values() ) { if ( !mMessagesByPriority[zPriority.ordinal()].isEmpty() ) { return zPriority; } } return null; } @SuppressWarnings({"unchecked"}) private static <T> T cast( Object pObject ) { return (T) pObject; } public void removeMessage( String pMessage ) { for ( Priority zPriority : Priority.values() ) { List<String> zMessages = mMessagesByPriority[zPriority.ordinal()]; if ( zMessages.remove( pMessage ) ) { return; } } } } } |