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Commons JCI core interfaces and implementations.
/*
* 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.commons.jci.compilers;
import java.util.HashMap;
import java.util.Map;
import org.apache.commons.jci.utils.ConversionUtils;
/**
* Creates JavaCompilers
*
* TODO use META-INF discovery mechanism
*
* @author tcurdt
*/
public final class JavaCompilerFactory {
/**
* @deprecated will be remove after the next release, please create an instance yourself
*/
private static final JavaCompilerFactory INSTANCE = new JavaCompilerFactory();
private final Map classCache = new HashMap();
/**
* @deprecated will be remove after the next release, please create an instance yourself
*/
public static JavaCompilerFactory getInstance() {
return JavaCompilerFactory.INSTANCE;
}
/**
* Tries to guess the class name by convention. So for compilers
* following the naming convention
*
* org.apache.commons.jci.compilers.SomeJavaCompiler
*
* you can use the short-hands "some"/"Some"/"SOME". Otherwise
* you have to provide the full class name. The compiler is
* getting instanciated via (cached) reflection.
*
* @param pHint
* @return JavaCompiler or null
*/
public JavaCompiler createCompiler(final String pHint) {
final String className;
if (pHint.indexOf('.') < 0) {
className = "org.apache.commons.jci.compilers." + ConversionUtils.toJavaCasing(pHint) + "JavaCompiler";
} else {
className = pHint;
}
Class clazz = (Class) classCache.get(className);
if (clazz == null) {
try {
clazz = Class.forName(className);
classCache.put(className, clazz);
} catch (ClassNotFoundException e) {
clazz = null;
}
}
if (clazz == null) {
return null;
}
try {
return (JavaCompiler) clazz.newInstance();
} catch (Throwable t) {
return null;
}
}
}