001    /**
002     * Copyright (c) 2000-2013 Liferay, Inc. All rights reserved.
003     *
004     * This library is free software; you can redistribute it and/or modify it under
005     * the terms of the GNU Lesser General Public License as published by the Free
006     * Software Foundation; either version 2.1 of the License, or (at your option)
007     * any later version.
008     *
009     * This library is distributed in the hope that it will be useful, but WITHOUT
010     * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
011     * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
012     * details.
013     */
014    
015    package com.liferay.portal.monitoring.jmx;
016    
017    import com.liferay.portal.kernel.util.HashUtil;
018    
019    import java.lang.reflect.Method;
020    
021    /**
022     * @author Shuyang Zhou
023     */
024    public class MethodSignature {
025    
026            public MethodSignature(Method method) {
027                    Class<?> clazz = method.getDeclaringClass();
028    
029                    _className = clazz.getName();
030    
031                    _methodName = method.getName();
032    
033                    Class<?>[] parameterTypes = method.getParameterTypes();
034    
035                    _parameterTypeNames = new String[parameterTypes.length];
036    
037                    for (int i = 0; i < parameterTypes.length; i++) {
038                            _parameterTypeNames[i] = parameterTypes[i].getName();
039                    }
040            }
041    
042            public MethodSignature(
043                    String className, String methodName, String[] parameterTypeNames) {
044    
045                    _className = className;
046                    _methodName = methodName;
047                    _parameterTypeNames = parameterTypeNames;
048            }
049    
050            @Override
051            public boolean equals(Object obj) {
052                    if (this == obj) {
053                            return true;
054                    }
055    
056                    if (!(obj instanceof MethodSignature)) {
057                            return false;
058                    }
059    
060                    MethodSignature methodSignature = (MethodSignature)obj;
061    
062                    if (_className.equals(methodSignature._className) &&
063                            _methodName.equals(methodSignature._methodName) &&
064                            (_parameterTypeNames.length ==
065                                    methodSignature._parameterTypeNames.length)) {
066    
067                            for (int i = 0; i < _parameterTypeNames.length; i++) {
068                                    if (!_parameterTypeNames[i].equals(
069                                                    methodSignature._parameterTypeNames[i])) {
070    
071                                            return false;
072                                    }
073                            }
074    
075                            return true;
076                    }
077    
078                    return false;
079            }
080    
081            public String getClassName() {
082                    return _className;
083            }
084    
085            public String getMethodName() {
086                    return _methodName;
087            }
088    
089            public String[] getParameterTypeNames() {
090                    return _parameterTypeNames;
091            }
092    
093            @Override
094            public int hashCode() {
095                    int hashCode = HashUtil.hash(0, _className);
096    
097                    hashCode = HashUtil.hash(hashCode, _methodName);
098    
099                    for (String parameterTypeName : _parameterTypeNames) {
100                            hashCode = HashUtil.hash(hashCode, parameterTypeName);
101                    }
102    
103                    return hashCode;
104            }
105    
106            private String _className;
107            private String _methodName;
108            private String[] _parameterTypeNames;
109    
110    }