/*
* Copyright 2010 JBoss Inc
*
* 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.drools.eclipse.dsl.editor;
import org.drools.lang.dsl.DSLMappingEntry;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.jface.viewers.ViewerSorter;
/**
* Provides sorting for the natural language table viewer.
*/
public class DSLMappingSorter extends ViewerSorter {
public final static int OBJECT = 0;
public final static int EXPRESSION = 1;
public final static int MAPPING = 2;
public final static int SCOPE = 3;
// Criteria that the instance uses
private int criteria;
/**
* Creates a resource sorter that will use the given sort criteria.
*
* @param criteria the sort criterion to use: one of <code>NAME</code> or
* <code>TYPE</code>
*/
public DSLMappingSorter(int criteria) {
super();
this.criteria = criteria;
}
/* (non-Javadoc)
* Method declared on ViewerSorter.
*/
public int compare(Viewer viewer, Object o1, Object o2) {
DSLMappingEntry item1 = (DSLMappingEntry) o1;
DSLMappingEntry item2 = (DSLMappingEntry) o2;
switch (criteria) {
case OBJECT:
return compareObject(item1, item2);
case EXPRESSION :
return compareExpressions(item1, item2);
case MAPPING :
return compareMappings(item1, item2);
case SCOPE :
return compareScope(item1, item2);
default:
return 0;
}
}
private int compareScope(DSLMappingEntry item1,
DSLMappingEntry item2) {
return item1.getSection().compareTo( item2.getSection() );
}
private int compareMappings(DSLMappingEntry item1,
DSLMappingEntry item2) {
return item1.getMappingValue().compareTo( item2.getMappingValue() );
}
private int compareExpressions(DSLMappingEntry item1,
DSLMappingEntry item2) {
return item1.getMappingKey().compareTo( item2.getMappingKey() );
}
private int compareObject(DSLMappingEntry item1,
DSLMappingEntry item2) {
return item1.getMetaData().compareTo(item2.getMetaData());
}
/**
* @return the sort criterion
*/
public int getCriteria() {
return criteria;
}
}