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// This Source Code is in the Public Domain per: http://unlicense.org package org.litesoft.GWT.client.widgets.datatables; import org.litesoft.bo.*; import org.litesoft.bo.views.*; import org.litesoft.commonfoundation.base.*; import org.litesoft.core.util.*; import java.util.*; public abstract class FilterManager<RowType extends IViewObject> implements FetchRowsDataProviderCallBack<RowType> { public static final String TOO_MANY_ROWS_MATCHED = "Too Many Rows Matched, Found At Least: "; public static final String NO_ROWS_MATCHED = "No Rows Matched"; public static final String NOTHING_ENTERED = "You must enter something"; public interface CallBacks<OurRowType extends IViewObject> { public ImmutableArrayList<OurRowType> filterRows( ImmutableArrayList<OurRowType> pRows ); public void setNewList( List<OurRowType> pList, String pMsgText ); } private BoMetaData mMetaData; private CallBacks<RowType> mCallBacks; private BoAccessorFilters mFilters = new BoAccessorFilters(); private BoAccessorFilters mBaseLineFilters = null; private List<RowType> mBaseLineRows = null; private int mVsFilters, mVsList; public FilterManager( BoMetaData pMetaData, CallBacks<RowType> pCallBacks ) { Confirm.isNotNull( "MetaData", mMetaData = pMetaData ); Confirm.isNotNull( "CallBacks", mCallBacks = pCallBacks ); } public void clearCache() { mBaseLineFilters = null; mBaseLineRows = null; } public boolean clear() { boolean rv = !mFilters.isEmpty(); if ( rv ) { mFilters.clear(); mVsFilters++; } return rv; } public boolean setFilter( BoAccessorFilterType pFilterType, String pAttributeName, String pValue ) { boolean zAdded = mFilters.setFilter( pFilterType, pAttributeName, pValue ); if ( zAdded ) { mVsFilters++; } return zAdded; } public boolean isEmpty() { return mFilters.isEmpty(); } public int activeFilters() { return mFilters.activeFilters(); } /** * @return false if the tables data model is up to date! */ public boolean updateList() { if ( mVsFilters == mVsList ) // Filter & List Match! { return false; } if ( mFilters.isEmpty() ) { setNewList( new ArrayList<RowType>(), NOTHING_ENTERED ); } else if ( mPendingRequest == null ) { requestRows(); } return true; } private void setNewList( List<RowType> pList, String pMsgText ) { mVsList = mVsFilters; mCallBacks.setNewList( pList, pMsgText ); } private void requestRows() { if ( (mBaseLineFilters != null) && !FilterUtil.needsRefresh( mMetaData, mBaseLineFilters, mFilters ) ) { Filter zFilter = FilterUtil.createFilter( mMetaData, mFilters.getFilters() ); ArrayList<RowType> zNewList = new ArrayList<RowType>(); for ( RowType zType : mBaseLineRows ) { if ( zFilter.isSatisfiedBy( zType ) ) { zNewList.add( zType ); } } setNewList( zNewList, zNewList.isEmpty() ? NO_ROWS_MATCHED : null ); return; } mPendingRequest = new PendingRequestStructure( mVsFilters, mFilters ); requestRowsFromServer( mPendingRequest.getFilters() ); } protected void addBaseline( BoAccessorFilters pFilters, List<RowType> pList ) { mBaseLineFilters = pFilters; // Simply save it - Not Shared/Used anymore mBaseLineRows = new ArrayList<RowType>( pList ); // Save it - Used by others - Copy it } abstract protected void requestRowsFromServer( BoAccessorFilters pFilters ); private static class PendingRequestStructure { private int mVsFilters; private BoAccessorFilters mFilters; public PendingRequestStructure( int pVsFilters, BoAccessorFilters pFilters ) { mVsFilters = pVsFilters; mFilters = pFilters.copy(); // Snap shot Filters } public int getVsFilters() { return mVsFilters; } public BoAccessorFilters getFilters() { return mFilters; } } private PendingRequestStructure mPendingRequest; private void filteredResponse( List<RowType> pList, // !null means that this could be a legitimate base line! String pMsgText ) { PendingRequestStructure zPendingRequest = mPendingRequest; // Capture & clear the current PendingRequest mPendingRequest = null; if ( pList != null ) { addBaseline( zPendingRequest.getFilters(), pList ); } if ( mVsList == mVsFilters ) // This should only be possible if the user has cleared the filters while the response was pending { return; } if ( mVsFilters != zPendingRequest.getVsFilters() ) // Filters have changed since request { requestRows(); return; } setNewList( (pList != null) ? pList : new ArrayList<RowType>(), pMsgText ); } @Override public void success( ImmutableArrayList<RowType> pRows ) { if ( (pRows == null) || pRows.isEmpty() ) { filteredResponse( new ArrayList<RowType>(), NO_ROWS_MATCHED ); } else { filteredResponse( mCallBacks.filterRows( pRows ).getSortedList(), null ); } } @Override public void tooMany( long pCount ) { filteredResponse( null, TOO_MANY_ROWS_MATCHED + pCount ); } @Override public void error( String pError ) { filteredResponse( null, "Error: " + pError ); } } |
Commits for litesoft/trunk/Java/GWT/Client/src/org/litesoft/GWT/client/widgets/datatables/FilterManager.java
Revision | Author | Commited | Message |
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950 Diff | GeorgeS | Thu 19 Jun, 2014 17:57:04 +0000 | New Lines |
948 Diff | GeorgeS | Sat 07 Jun, 2014 23:42:39 +0000 | Jusefuls Formatter Updated to New Code Format |
947 Diff | GeorgeS | Fri 06 Jun, 2014 23:36:56 +0000 | Correct Spelling of package! |
939 Diff | GeorgeS | Mon 02 Jun, 2014 21:30:31 +0000 | Extracting commonfoundation |
917 Diff | GeorgeS | Sun 08 Dec, 2013 20:49:56 +0000 | 1.7 prep & VersionedStaticContentFilter upgrade to new “/ver” model! |
804 Diff | GeorgeS | Wed 15 Aug, 2012 12:48:51 +0000 | |
216 Diff | GeorgeS | Wed 18 May, 2011 13:44:57 +0000 | |
199 Diff | GeorgeS | Tue 10 May, 2011 00:55:21 +0000 | |
151 Diff | GeorgeS | Thu 17 Mar, 2011 04:16:22 +0000 | |
49 | GeorgeS | Mon 12 Apr, 2010 02:59:10 +0000 | License Text |