| /* |
| * Copyright (c) 2009-2011, Rickard Öberg. All Rights Reserved. |
| * Copyright (c) 2007-2013, Niclas Hedhman. All Rights Reserved. |
| * Copyright (c) 2014, Paul Merlin. All Rights Reserved. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or |
| * implied. |
| * |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.qi4j.spi.entitystore.helpers; |
| |
| import java.util.Iterator; |
| import java.util.NoSuchElementException; |
| import org.json.JSONArray; |
| import org.json.JSONException; |
| import org.json.JSONObject; |
| import org.qi4j.api.entity.EntityReference; |
| import org.qi4j.spi.entity.NamedAssociationState; |
| import org.qi4j.spi.entitystore.EntityStoreException; |
| |
| /** |
| * JSON implementation of NamedAssociationState. |
| * <p>Backed by a JSONObject.</p> |
| */ |
| public final class JSONNamedAssociationState |
| implements NamedAssociationState |
| { |
| |
| private final JSONEntityState entityState; |
| private final JSONObject references; |
| |
| public JSONNamedAssociationState( JSONEntityState entityState, JSONObject references ) |
| { |
| this.entityState = entityState; |
| this.references = references; |
| } |
| |
| @Override |
| public int count() |
| { |
| return references.length(); |
| } |
| |
| @Override |
| public boolean containsName( String name ) |
| { |
| return references.has( name ); |
| } |
| |
| @Override |
| public boolean put( String name, EntityReference entityReference ) |
| { |
| try |
| { |
| if( references.has( name ) && entityReference.identity().equals( references.getString( name ) ) ) |
| { |
| return false; |
| } |
| entityState.cloneStateIfGlobalStateLoaded(); |
| references.put( name, entityReference.identity() ); |
| entityState.markUpdated(); |
| return true; |
| } |
| catch( JSONException ex ) |
| { |
| throw new EntityStoreException( ex ); |
| } |
| } |
| |
| @Override |
| public boolean remove( String name ) |
| { |
| if( !references.has( name ) ) |
| { |
| return false; |
| } |
| entityState.cloneStateIfGlobalStateLoaded(); |
| references.remove( name ); |
| entityState.markUpdated(); |
| return true; |
| } |
| |
| @Override |
| public EntityReference get( String name ) |
| { |
| try |
| { |
| return new EntityReference( references.getString( name ) ); |
| } |
| catch( JSONException ex ) |
| { |
| return null; |
| } |
| } |
| |
| @Override |
| public String nameOf( EntityReference entityReference ) |
| { |
| JSONArray names = references.names(); |
| if( names == null ) |
| { |
| return null; |
| } |
| try |
| { |
| for( int idx = 0; idx < names.length(); idx++ ) |
| { |
| String name = names.getString( idx ); |
| if( entityReference.identity().equals( references.getString( name ) ) ) |
| { |
| return name; |
| } |
| } |
| return null; |
| } |
| catch( JSONException ex ) |
| { |
| throw new EntityStoreException( ex ); |
| } |
| } |
| |
| @Override |
| public Iterator<String> iterator() |
| { |
| final JSONArray names = references.names() == null ? new JSONArray() : references.names(); |
| return new Iterator<String>() |
| { |
| private int idx = 0; |
| |
| @Override |
| public boolean hasNext() |
| { |
| return idx < names.length(); |
| } |
| |
| @Override |
| public String next() |
| { |
| try |
| { |
| String next = names.getString( idx ); |
| idx++; |
| return next; |
| } |
| catch( JSONException ex ) |
| { |
| throw new NoSuchElementException(); |
| } |
| } |
| |
| @Override |
| public void remove() |
| { |
| throw new UnsupportedOperationException( "remove() is not supported on NamedAssociation iterators." ); |
| } |
| }; |
| } |
| |
| @Override |
| public String toString() |
| { |
| return references.toString(); |
| } |
| |
| } |