/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.apache.directory.studio.schemaeditor.view.editors.attributetype;
import java.util.Collections;
import java.util.List;
import org.apache.directory.api.ldap.model.schema.AttributeType;
import org.apache.directory.studio.schemaeditor.Activator;
import org.apache.directory.studio.schemaeditor.controller.SchemaHandler;
import org.apache.directory.studio.schemaeditor.view.editors.NonExistingAttributeType;
import org.eclipse.jface.viewers.IStructuredContentProvider;
import org.eclipse.jface.viewers.Viewer;
/**
* This class implements the Content Provider for the Superior Combo of the Attribute Type Editor.
*
* @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
*/
public class ATESuperiorComboContentProvider implements IStructuredContentProvider
{
/** The Schema Handler */
private SchemaHandler schemaHandler;
/**
* Creates a new instance of ATESuperiorComboContentProvider.
*/
public ATESuperiorComboContentProvider()
{
schemaHandler = Activator.getDefault().getSchemaHandler();
}
/**
* {@inheritDoc}
*/
public Object[] getElements( Object inputElement )
{
if ( inputElement instanceof ATESuperiorComboInput )
{
ATESuperiorComboInput input = ( ATESuperiorComboInput ) inputElement;
if ( input.getChildren().isEmpty() )
{
AttributeType editorAT = input.getAttributeType();
// Creating the '(None)' item
input.addChild( new NonExistingAttributeType( NonExistingAttributeType.NONE ) );
// Creating Children
List<AttributeType> ats = schemaHandler.getAttributeTypes();
for ( AttributeType at : ats )
{
if ( !isSubType( at, editorAT ) )
{
input.addChild( at );
}
}
}
// Getting Children
List<Object> children = input.getChildren();
// Sorting Children
Collections.sort( children, new ATESuperiorComboComparator() );
return children.toArray();
}
// Default
return new Object[0];
}
/**
* {@inheritDoc}
*/
public void dispose()
{
}
/**
* {@inheritDoc}
*/
public void inputChanged( Viewer viewer, Object oldInput, Object newInput )
{
}
/**
* Checks id an Attribute Type is a sub type of another Attribute Type.
*
* @param at1
* the first Attribute Type
* @param at2
* the second Attribute Type
* @return
* true if at1 is a sub type of at2
*/
private boolean isSubType( AttributeType at1, AttributeType at2 )
{
if ( at1.equals( at2 ) )
{
return true;
}
else
{
String sup = at1.getSuperiorOid();
if ( sup == null )
{
return false;
}
else
{
AttributeType supAT = schemaHandler.getAttributeType( sup );
if ( supAT == null )
{
return false;
}
else
{
return isSubType( supAT, at2 );
}
}
}
}
}