litesoft
@ 947
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// This Source Code is in the Public Domain per: http://unlicense.org package org.litesoft.bo.change; import org.litesoft.commonfoundation.typeutils.*; import java.util.*; public class OriginalValueChangeTrackerImpl implements OriginalValueChangeTracker { private static final long serialVersionUID = 1L; private HashSet<String> mChangedAttributeNames = new HashSet<String>(); private transient Map<String, ChangeEntry> mAttributeNameToOriginalValues; // null == sent across the wire! public OriginalValueChangeTrackerImpl( Map<String, ChangeEntry> pAttributeNameToOriginalValues ) { mAttributeNameToOriginalValues = pAttributeNameToOriginalValues; } public OriginalValueChangeTrackerImpl() { this( null ); } public OriginalValueChangeTracker clear() { mChangedAttributeNames.clear(); if ( mAttributeNameToOriginalValues != null ) { mAttributeNameToOriginalValues.clear(); } return createNullTracker(); } public OriginalValueChangeTracker recordChange( String pAttributeName, ChangeEntry pNewChangeEntry, Object pOldValue, Object pNewValue ) { if ( mAttributeNameToOriginalValues == null ) { throw new IllegalStateException( "Attempt to record a change on a re-constituted from Serialization immutable instance!" ); } if ( !mChangedAttributeNames.contains( pAttributeName ) ) // Not currently in change set { // then add it AND its Original value mChangedAttributeNames.add( pAttributeName ); mAttributeNameToOriginalValues.put( pAttributeName, pNewChangeEntry ); return this; } ChangeEntry zOrigChangeEntry = mAttributeNameToOriginalValues.get( pAttributeName ); if ( pNewChangeEntry.equals( zOrigChangeEntry ) ) // Original value == new Value { // then pretend we never saw it! if ( mChangedAttributeNames.size() == 1 ) { return clear(); } mChangedAttributeNames.remove( pAttributeName ); mAttributeNameToOriginalValues.remove( pAttributeName ); } return this; } public boolean hasChanges() { return !mChangedAttributeNames.isEmpty(); } public boolean isAttributeChanged( String pAttributeName ) { return mChangedAttributeNames.contains( pAttributeName ); } public boolean isOriginalValueAvailableFor( String pAttributeName ) { return (mAttributeNameToOriginalValues != null) && mAttributeNameToOriginalValues.containsKey( pAttributeName ); } public Object getOriginalValueFor( String pAttributeName ) { ChangeEntry zChangeEntry = getOriginalValueChangeEntryFor( pAttributeName ); return (zChangeEntry != null) ? zChangeEntry.getOriginalValue() : null; } public ChangeEntry getOriginalValueChangeEntryFor( String pAttributeName ) { return (mAttributeNameToOriginalValues != null) ? mAttributeNameToOriginalValues.get( pAttributeName ) : null; } public String[] getChangedAttributeNames() { return mChangedAttributeNames.isEmpty() ? // Strings.EMPTY_ARRAY : // mChangedAttributeNames.toArray( new String[mChangedAttributeNames.size()] ); } protected OriginalValueChangeTracker createNullTracker() { return OriginalValueChangeTrackerNull.INSTANCE; } } |
Commits for litesoft/trunk/Java/core/Anywhere/src/org/litesoft/bo/change/OriginalValueChangeTrackerImpl.java
Revision | Author | Commited | Message |
---|---|---|---|
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 |
849 Diff | GeorgeS | Tue 11 Sep, 2012 17:11:59 +0000 | Clean up serialization |
800 Diff | GeorgeS | Wed 15 Aug, 2012 03:33:38 +0000 | |
151 Diff | GeorgeS | Thu 17 Mar, 2011 04:16:22 +0000 | |
49 Diff | GeorgeS | Mon 12 Apr, 2010 02:59:10 +0000 | License Text |
2 | GeorgeS | Sun 07 Feb, 2010 12:50:58 +0000 |