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/*
* Copyright 2001-2007 the original author or authors.
*
* 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.jetbrains.generate.tostring.velocity;
import org.apache.commons.collections.ExtendedProperties;
import org.apache.velocity.app.VelocityEngine;
import org.apache.velocity.runtime.log.SimpleLog4JLogSystem;
/**
* Velocity factory.
* <p/>
* Creating instances of the VelocityEngine.
*/
public class VelocityFactory {
private static VelocityEngine engine;
/**
* Privte constructor.
*/
private VelocityFactory() {
}
/**
* Returns a new instance of the VelocityEngine.
* <p/>
* The engine is initialized and outputs its logging to IDEA logging.
*
* @return a new velocity engine that is initialized.
* @throws Exception error creating the VelocityEngine.
*/
public static VelocityEngine newVeloictyEngine() throws Exception {
ExtendedProperties prop = new ExtendedProperties();
prop.addProperty(VelocityEngine.RUNTIME_LOG_LOGSYSTEM_CLASS, SimpleLog4JLogSystem.class.getName());
prop.addProperty("runtime.log.logsystem.log4j.category", "GenerateToString");
VelocityEngine velocity = new VelocityEngine();
velocity.setExtendedProperties(prop);
velocity.init();
return velocity;
}
/**
* Get's a shared instance of the VelocityEngine.
* <p/>
* The engine is initialized and outputs its logging to IDEA logging.
* @return a shared instance of the engine that is initialized.
* @throws Exception error creating the VelocityEngine.
*/
public static VelocityEngine getVelocityEngine() throws Exception {
if (engine == null) {
engine = newVeloictyEngine();
}
return engine;
}
}
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