| 1 | /* |
| 2 | * Copyright (c) 2001-2009, Jean Tessier |
| 3 | * All rights reserved. |
| 4 | * |
| 5 | * Redistribution and use in source and binary forms, with or without |
| 6 | * modification, are permitted provided that the following conditions |
| 7 | * are met: |
| 8 | * |
| 9 | * * Redistributions of source code must retain the above copyright |
| 10 | * notice, this list of conditions and the following disclaimer. |
| 11 | * |
| 12 | * * Redistributions in binary form must reproduce the above copyright |
| 13 | * notice, this list of conditions and the following disclaimer in the |
| 14 | * documentation and/or other materials provided with the distribution. |
| 15 | * |
| 16 | * * Neither the name of Jean Tessier nor the names of his contributors |
| 17 | * may be used to endorse or promote products derived from this software |
| 18 | * without specific prior written permission. |
| 19 | * |
| 20 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 21 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 22 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 23 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR |
| 24 | * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| 25 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| 26 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| 27 | * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
| 28 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
| 29 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| 30 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 31 | */ |
| 32 | |
| 33 | package com.jeantessier.classreader.impl; |
| 34 | |
| 35 | import java.io.*; |
| 36 | import java.util.*; |
| 37 | |
| 38 | import com.jeantessier.classreader.*; |
| 39 | |
| 40 | public class Method_info extends Feature_info implements com.jeantessier.classreader.Method_info { |
| 41 | private static final int ACC_SYNCHRONIZED = 0x0020; |
| 42 | private static final int ACC_BRIDGE = 0x0040; |
| 43 | private static final int ACC_VARARGS = 0x0080; |
| 44 | private static final int ACC_NATIVE = 0x0100; |
| 45 | private static final int ACC_ABSTRACT = 0x0400; |
| 46 | private static final int ACC_STRICT = 0x0800; |
| 47 | |
| 48 | public Method_info(Classfile classfile, DataInput in) throws IOException { |
| 49 | super(classfile, in); |
| 50 | } |
| 51 | |
| 52 | public String getFeatureType() { |
| 53 | return "method"; |
| 54 | } |
| 55 | |
| 56 | public boolean isSynchronized() { |
| 57 | return (getAccessFlag() & ACC_SYNCHRONIZED) != 0; |
| 58 | } |
| 59 | |
| 60 | public boolean isBridge() { |
| 61 | return (getAccessFlag() & ACC_BRIDGE) != 0; |
| 62 | } |
| 63 | |
| 64 | public boolean isVarargs() { |
| 65 | return (getAccessFlag() & ACC_VARARGS) != 0; |
| 66 | } |
| 67 | |
| 68 | public boolean isNative() { |
| 69 | return (getAccessFlag() & ACC_NATIVE) != 0; |
| 70 | } |
| 71 | |
| 72 | public boolean isAbstract() { |
| 73 | return (getAccessFlag() & ACC_ABSTRACT) != 0; |
| 74 | } |
| 75 | |
| 76 | public boolean isStrict() { |
| 77 | return (getAccessFlag() & ACC_STRICT) != 0; |
| 78 | } |
| 79 | |
| 80 | public boolean isConstructor() { |
| 81 | return getName().equals("<init>"); |
| 82 | } |
| 83 | |
| 84 | public boolean isStaticInitializer() { |
| 85 | return getName().equals("<clinit>"); |
| 86 | } |
| 87 | |
| 88 | public Collection<Class_info> getExceptions() { |
| 89 | Collection<Class_info> result = Collections.emptyList(); |
| 90 | |
| 91 | for (Attribute_info attribute : getAttributes()) { |
| 92 | if (attribute instanceof Exceptions_attribute) { |
| 93 | result = ((Exceptions_attribute) attribute).getExceptions(); |
| 94 | } |
| 95 | } |
| 96 | |
| 97 | return result; |
| 98 | } |
| 99 | |
| 100 | public String getSignature() { |
| 101 | StringBuffer result = new StringBuffer(); |
| 102 | |
| 103 | if (isConstructor()) { |
| 104 | result.append(getClassfile().getSimpleName()); |
| 105 | result.append(DescriptorHelper.getSignature(getDescriptor())); |
| 106 | } else if (isStaticInitializer()) { |
| 107 | result.append("static {}"); |
| 108 | } else { |
| 109 | result.append(getName()); |
| 110 | result.append(DescriptorHelper.getSignature(getDescriptor())); |
| 111 | } |
| 112 | |
| 113 | return result.toString(); |
| 114 | } |
| 115 | |
| 116 | public String getReturnType() { |
| 117 | return DescriptorHelper.getReturnType(getDescriptor()); |
| 118 | } |
| 119 | |
| 120 | public String getDeclaration() { |
| 121 | StringBuffer result = new StringBuffer(); |
| 122 | |
| 123 | if (isPublic()) result.append("public "); |
| 124 | if (isProtected()) result.append("protected "); |
| 125 | if (isPrivate()) result.append("private "); |
| 126 | if (isStatic() && !isStaticInitializer()) result.append("static "); |
| 127 | if (isFinal()) result.append("final "); |
| 128 | if (isSynchronized()) result.append("synchronized "); |
| 129 | if (isNative()) result.append("native "); |
| 130 | if (isAbstract()) result.append("abstract "); |
| 131 | |
| 132 | if (!isConstructor() && !isStaticInitializer()) { |
| 133 | result.append((getReturnType() != null) ? getReturnType() : "void").append(" "); |
| 134 | } |
| 135 | |
| 136 | result.append(getSignature()); |
| 137 | |
| 138 | if (getExceptions().size() != 0) { |
| 139 | result.append(" throws "); |
| 140 | Iterator i = getExceptions().iterator(); |
| 141 | while (i.hasNext()) { |
| 142 | result.append(i.next()); |
| 143 | if (i.hasNext()) { |
| 144 | result.append(", "); |
| 145 | } |
| 146 | } |
| 147 | } |
| 148 | |
| 149 | return result.toString(); |
| 150 | } |
| 151 | |
| 152 | public com.jeantessier.classreader.Code_attribute getCode() { |
| 153 | CodeFinder finder = new CodeFinder(); |
| 154 | accept(finder); |
| 155 | return finder.getCode(); |
| 156 | } |
| 157 | |
| 158 | public void accept(Visitor visitor) { |
| 159 | visitor.visitMethod_info(this); |
| 160 | } |
| 161 | } |