001 /*
002 * Sonar, open source software quality management tool.
003 * Copyright (C) 2009 SonarSource SA
004 * mailto:contact AT sonarsource DOT com
005 *
006 * Sonar is free software; you can redistribute it and/or
007 * modify it under the terms of the GNU Lesser General Public
008 * License as published by the Free Software Foundation; either
009 * version 3 of the License, or (at your option) any later version.
010 *
011 * Sonar is distributed in the hope that it will be useful,
012 * but WITHOUT ANY WARRANTY; without even the implied warranty of
013 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
014 * Lesser General Public License for more details.
015 *
016 * You should have received a copy of the GNU Lesser General Public
017 * License along with Sonar; if not, write to the Free Software
018 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02
019 */
020 package org.sonar.java.language;
021
022 import java.util.ArrayList;
023 import java.util.Arrays;
024 import java.util.Hashtable;
025 import java.util.List;
026 import java.util.Map;
027
028 import org.apache.commons.lang.StringUtils;
029
030 public class JavaMethodSignature {
031
032 private final String methodName;
033 private final ReturnType returnType;
034 private final List<ArgumentType> argumentTypes;
035 private final boolean isConstructor;
036
037 private static Map<String, JavaType> javaTypes = new Hashtable<String, JavaType>();
038 private static final char ARRAY = '[';
039
040 static {
041 for (JavaType javaType : Arrays.asList(JavaType.values())) {
042 javaTypes.put(javaType.JVMTypeIdentifier, javaType);
043 }
044 }
045
046 public JavaMethodSignature(String methodName, ReturnType returnType, ArgumentType... argumentTypes) {
047 this(methodName, returnType, Arrays.asList(argumentTypes));
048 }
049
050 public JavaMethodSignature(String methodName, ReturnType returnType, List<ArgumentType> argumentTypes) {
051 this.methodName = methodName;
052 this.returnType = returnType;
053 this.argumentTypes = argumentTypes;
054 if (returnType == null) {
055 isConstructor = true;
056 } else {
057 isConstructor = false;
058 }
059
060 }
061
062 public static JavaMethodSignature create(String methodSignature) {
063 int leftBracketIndex = methodSignature.indexOf('(');
064 int rightBracketIndex = methodSignature.indexOf(')');
065 String methodName = methodSignature.substring(0, leftBracketIndex);
066 ReturnType returnType = extractReturnType(methodSignature.substring(rightBracketIndex + 1));
067 List<ArgumentType> argumentTypes = extractArgumentTypes(methodSignature.substring(leftBracketIndex + 1, rightBracketIndex));
068 return new JavaMethodSignature(methodName, returnType, argumentTypes);
069 }
070
071 static List<ArgumentType> extractArgumentTypes(String argumentTypesSignature) {
072 List<ArgumentType> argumentTypes = new ArrayList<ArgumentType>();
073 int argumentTypeStartIndex = 0;
074 int argumentTypeEndIndex = 0;
075 while ((argumentTypeEndIndex = argumentTypesSignature.indexOf(';', argumentTypeStartIndex)) != -1) {
076 ArgumentType argumentAndReturnType = extractArgumentType(argumentTypesSignature.substring(argumentTypeStartIndex,
077 argumentTypeEndIndex));
078 argumentTypes.add(argumentAndReturnType);
079 argumentTypeStartIndex = argumentTypeEndIndex + 1;
080 }
081 return argumentTypes;
082 }
083
084 private static ArgumentType extractArgumentType(String argumentTypeSignature) {
085 return new ArgumentType(extractType(argumentTypeSignature));
086 }
087
088 private static ReturnType extractReturnType(String returnTypeSignature) {
089 if (StringUtils.isBlank(returnTypeSignature)) {
090 return null;
091 }
092 return new ReturnType(extractType(returnTypeSignature));
093 }
094
095 static ArgumentAndReturnType extractType(String stringTypeSignature) {
096 boolean isArray = false;
097 int index = 0;
098 String classCanonicalName = null;
099 if (stringTypeSignature.charAt(0) == ARRAY) {
100 isArray = true;
101 index++;
102 }
103 JavaType javaType = javaTypes.get(stringTypeSignature.substring(index, index + 1));
104 index++;
105 if (javaType == JavaType.OBJECT) {
106 classCanonicalName = stringTypeSignature.substring(index);
107 classCanonicalName = StringUtils.remove(classCanonicalName, ';');
108 }
109 return new ArgumentType(javaType, classCanonicalName, isArray);
110 }
111
112 public String dumpMethodSignature() {
113 StringBuilder builder = new StringBuilder();
114 builder.append(methodName);
115 builder.append("(");
116 for (ArgumentAndReturnType argumentType : argumentTypes) {
117 builder.append(dumpTypeSignature(argumentType));
118 builder.append(';');
119 }
120 builder.append(")");
121 if (!isConstructor) {
122 builder.append(dumpTypeSignature(returnType));
123 if (!returnType.isVoid()) {
124 builder.append(";");
125 }
126 }
127 return builder.toString();
128 }
129
130 static String dumpTypeSignature(ArgumentAndReturnType argumentType) {
131 String result = "";
132 if (argumentType.isArray()) {
133 result += ARRAY;
134 }
135 result += argumentType.getJavaType().JVMTypeIdentifier;
136 if (argumentType.isOject()) {
137 result += argumentType.getClassCanonicalName();
138 }
139 return result;
140 }
141 }