/**
* 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.editors;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.List;
/**
* This provides a list of keywords for syntax highlighting.
* Uses a pseudo properties file format.
* @author Michael Neale
*/
public class Keywords {
private String[] allDrools;
private String[] allJava;
private String[] allMvel;
private static Keywords instance;
public static Keywords getInstance() {
if (instance == null) {
instance = new Keywords();
}
return instance;
}
public String[] getAllDroolsKeywords() {
return allDrools;
}
public String[] getAllJavaKeywords() {
return allJava;
}
public String[] getAllMvelKeywords() {
return allMvel;
}
private Keywords() {
allDrools = readKeywords("keywords.properties");
allJava = readKeywords("java_keywords.properties");
allMvel = readKeywords("mvel_keywords.properties");
}
private String[] readKeywords(String fileName) {
InputStream stream = this.getClass().getResourceAsStream(fileName);
try {
BufferedReader reader = new BufferedReader(new InputStreamReader(stream));
List list = new ArrayList();
String line = null;
while ((line = reader.readLine()) != null) {
if (!line.startsWith( "#" )) list.add( line );
}
return (String[]) list.toArray( new String[list.size()] );
}
catch ( IOException e ) {
throw new IllegalArgumentException("Could not load keywords for editor.");
}
finally {
try {
stream.close();
}
catch ( IOException e ) {
throw new IllegalStateException("Error closing stream.");
}
}
}
}