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 26 package com.sun.codemodel.internal; 27 28 import java.io.PrintWriter; 29 import java.io.StringWriter; 30 31 /** 32 * Modifier groups. 33 */ 34 public class JMods implements JGenerable { 35 36 // 37 // mask 38 // 39 private static int VAR = JMod.FINAL; 40 private static int FIELD = (JMod.PUBLIC | JMod.PRIVATE | JMod.PROTECTED 41 | JMod.STATIC | JMod.FINAL 42 | JMod.TRANSIENT | JMod.VOLATILE); 43 private static int METHOD = (JMod.PUBLIC | JMod.PRIVATE | JMod.PROTECTED | JMod.FINAL 44 | JMod.ABSTRACT | JMod.STATIC | JMod.NATIVE | JMod.SYNCHRONIZED); 45 private static int CLASS = (JMod.PUBLIC | JMod.PRIVATE | JMod.PROTECTED 46 | JMod.STATIC | JMod.FINAL | JMod.ABSTRACT); 47 private static int INTERFACE = JMod.PUBLIC; 48 /** bit-packed representation of modifiers. */ 49 private int mods; 50 51 private JMods(int mods) { 52 this.mods = mods; 53 } 54 55 /** 56 * Gets the bit-packed representaion of modifiers. 57 */ 58 public int getValue() { 59 return mods; 60 } 61 62 private static void check(int mods, int legal, String what) { 63 if ((mods & ~legal) != 0) { 64 throw new IllegalArgumentException("Illegal modifiers for " 65 + what + ": " 66 + new JMods(mods).toString()); 67 } 68 /* ## check for illegal combinations too */ 69 } 70 71 static JMods forVar(int mods) { 72 check(mods, VAR, "variable"); 73 return new JMods(mods); 74 } 75 76 static JMods forField(int mods) { 77 check(mods, FIELD, "field"); 78 return new JMods(mods); 79 } 80 81 static JMods forMethod(int mods) { 82 check(mods, METHOD, "method"); 83 return new JMods(mods); 84 } 85 86 static JMods forClass(int mods) { 87 check(mods, CLASS, "class"); 88 return new JMods(mods); 89 } 90 91 static JMods forInterface(int mods) { 92 check(mods, INTERFACE, "class"); 93 return new JMods(mods); 94 } 95 96 public boolean isAbstract() { 97 return (mods & JMod.ABSTRACT) != 0; 98 } 99 100 public boolean isNative() { 101 return (mods & JMod.NATIVE) != 0; 102 } 103 104 public boolean isSynchronized() { 105 return (mods & JMod.SYNCHRONIZED) != 0; 106 } 107 108 public void setSynchronized(boolean newValue) { 109 setFlag(JMod.SYNCHRONIZED, newValue); 110 } 111 112 public void setPrivate() { 113 setFlag(JMod.PUBLIC, false); 114 setFlag(JMod.PROTECTED, false); 115 setFlag(JMod.PRIVATE, true); 116 } 117 118 public void setProtected() { 119 setFlag(JMod.PUBLIC, false); 120 setFlag(JMod.PROTECTED, true); 121 setFlag(JMod.PRIVATE, false); 122 } 123 124 public void setPublic() { 125 setFlag(JMod.PUBLIC, true); 126 setFlag(JMod.PROTECTED, false); 127 setFlag(JMod.PRIVATE, false); 128 } 129 130 public void setFinal(boolean newValue) { 131 setFlag(JMod.FINAL, newValue); 132 } 133 134 private void setFlag(int bit, boolean newValue) { 135 mods = (mods & ~bit) | (newValue ? bit : 0); 136 } 137 138 public void generate(JFormatter f) { 139 if ((mods & JMod.PUBLIC) != 0) f.p("public"); 140 if ((mods & JMod.PROTECTED) != 0) f.p("protected"); 141 if ((mods & JMod.PRIVATE) != 0) f.p("private"); 142 if ((mods & JMod.FINAL) != 0) f.p("final"); 143 if ((mods & JMod.STATIC) != 0) f.p("static"); 144 if ((mods & JMod.ABSTRACT) != 0) f.p("abstract"); 145 if ((mods & JMod.NATIVE) != 0) f.p("native"); 146 if ((mods & JMod.SYNCHRONIZED) != 0) f.p("synchronized"); 147 if ((mods & JMod.TRANSIENT) != 0) f.p("transient"); 148 if ((mods & JMod.VOLATILE) != 0) f.p("volatile"); 149 } 150 151 @Override 152 public String toString() { 153 StringWriter s = new StringWriter(); 154 JFormatter f = new JFormatter(new PrintWriter(s)); 155 this.generate(f); 156 return s.toString(); 157 } 158 }