1/* 2 * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26package com.sun.codemodel.internal; 27 28import java.util.Iterator; 29import java.util.List; 30 31/** 32 * Type variable used to declare generics. 33 * 34 * @see JGenerifiable 35 * @author 36 * Kohsuke Kawaguchi (kohsuke.kawaguchi@sun.com) 37 */ 38public final class JTypeVar extends JClass implements JDeclaration { 39 40 private final String name; 41 42 private JClass bound; 43 44 JTypeVar(JCodeModel owner, String _name) { 45 super(owner); 46 this.name = _name; 47 } 48 49 public String name() { 50 return name; 51 } 52 53 public String fullName() { 54 return name; 55 } 56 57 public JPackage _package() { 58 return null; 59 } 60 61 /** 62 * Adds a bound to this variable. 63 * 64 * @return this 65 */ 66 public JTypeVar bound( JClass c ) { 67 if(bound!=null) 68 throw new IllegalArgumentException("type variable has an existing class bound "+bound); 69 bound = c; 70 return this; 71 } 72 73 /** 74 * Returns the class bound of this variable. 75 * 76 * <p> 77 * If no bound is given, this method returns {@link Object}. 78 */ 79 public JClass _extends() { 80 if(bound!=null) 81 return bound; 82 else 83 return owner().ref(Object.class); 84 } 85 86 /** 87 * Returns the interface bounds of this variable. 88 */ 89 public Iterator<JClass> _implements() { 90 return bound._implements(); 91 } 92 93 public boolean isInterface() { 94 return false; 95 } 96 97 public boolean isAbstract() { 98 return false; 99 } 100 101 /** 102 * Prints out the declaration of the variable. 103 */ 104 public void declare(JFormatter f) { 105 f.id(name); 106 if(bound!=null) 107 f.p("extends").g(bound); 108 } 109 110 111 protected JClass substituteParams(JTypeVar[] variables, List<JClass> bindings) { 112 for(int i=0;i<variables.length;i++) 113 if(variables[i]==this) 114 return bindings.get(i); 115 return this; 116 } 117 118 public void generate(JFormatter f) { 119 f.id(name); 120 } 121} 122