1 /* 2 * Licensed to the Apache Software Foundation (ASF) under one or more 3 * contributor license agreements. See the NOTICE file distributed with 4 * this work for additional information regarding copyright ownership. 5 * The ASF licenses this file to You under the Apache License, Version 2.0 6 * (the "License"); you may not use this file except in compliance with 7 * the License. You may obtain a copy of the License at 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 */ 17 18 package org.apache.commons.jci.compilers; 19 20 import java.util.HashMap; 21 import java.util.Map; 22 23 import org.apache.commons.jci.utils.ConversionUtils; 24 25 26 /** 27 * Creates JavaCompilers 28 * 29 * TODO use META-INF discovery mechanism 30 * 31 * @author tcurdt 32 */ 33 public final class JavaCompilerFactory { 34 35 /** 36 * @deprecated will be remove after the next release, please create an instance yourself 37 */ 38 private static final JavaCompilerFactory INSTANCE = new JavaCompilerFactory(); 39 40 private final Map classCache = new HashMap(); 41 42 /** 43 * @deprecated will be remove after the next release, please create an instance yourself 44 */ 45 public static JavaCompilerFactory getInstance() { 46 return JavaCompilerFactory.INSTANCE; 47 } 48 49 /** 50 * Tries to guess the class name by convention. So for compilers 51 * following the naming convention 52 * 53 * org.apache.commons.jci.compilers.SomeJavaCompiler 54 * 55 * you can use the short-hands "some"/"Some"/"SOME". Otherwise 56 * you have to provide the full class name. The compiler is 57 * getting instanciated via (cached) reflection. 58 * 59 * @param pHint 60 * @return JavaCompiler or null 61 */ 62 public JavaCompiler createCompiler(final String pHint) { 63 64 final String className; 65 if (pHint.indexOf('.') < 0) { 66 className = "org.apache.commons.jci.compilers." + ConversionUtils.toJavaCasing(pHint) + "JavaCompiler"; 67 } else { 68 className = pHint; 69 } 70 71 Class clazz = (Class) classCache.get(className); 72 73 if (clazz == null) { 74 try { 75 clazz = Class.forName(className); 76 classCache.put(className, clazz); 77 } catch (ClassNotFoundException e) { 78 clazz = null; 79 } 80 } 81 82 if (clazz == null) { 83 return null; 84 } 85 86 try { 87 return (JavaCompiler) clazz.newInstance(); 88 } catch (Throwable t) { 89 return null; 90 } 91 } 92 93 }