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Java > Open Source Codes > org > ozoneDB > core > MethodKey


1 // You can redistribute this software and/or modify it under the terms of
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3 // the Ozone Core License version 1 published by ozone-db.org.
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5 //
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7 // The original code and portions created by SMB are
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9 // Copyright (C) 1997-@year@ by SMB GmbH. All rights reserved.
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11 //
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13 // $Id: MethodKey.java,v 1.5 2003/11/01 18:34:36 ohlrogge Exp $
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15
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17 package org.ozoneDB.core;
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19
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21 import org.ozoneDB.DxLib.DxCompatible;
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23 import org.ozoneDB.DxLib.DxObject;
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25
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27 import java.lang.reflect.Method JavaDoc;
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31
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33 /**
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35  * Objects of this class are the keys in the method cache table of the
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37  * {@link AbstractObjectContainer}. This class implements the way we map from
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39  * class+methodName+sig to the actual method. This is very important for the
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41  * overall peformance of ozone. Besides this class is used to sort method
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43  * arrays.
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45  *
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47  *
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49  * @author <a HREF="http://www.softwarebuero.de/">SMB</a>
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51  * @version $Revision: 1.5 $Date: 2003/11/01 18:34:36 $
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53  */
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55 public final class MethodKey implements Comparable JavaDoc
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57 {
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59     protected String JavaDoc methodName;
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61
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63     protected String JavaDoc sig;
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65
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67     protected String JavaDoc className;
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69
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71     protected Method JavaDoc method;
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77     public MethodKey( String JavaDoc _className, String JavaDoc _methodName, String JavaDoc _sig ) {
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79         this( _className, _methodName, _sig, null );
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81     }
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87     public MethodKey( String JavaDoc _className, String JavaDoc _methodName, String JavaDoc _sig, Method JavaDoc _method ) {
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89         className = _className;
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91         methodName = _methodName;
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93         sig = _sig;
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95         method = _method;
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97     }
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103     public Method JavaDoc method() {
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105         return method;
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107     }
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113     public int hashCode() {
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115         return methodName.hashCode() ^ sig.hashCode();
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117     }
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123     public boolean equals( Object JavaDoc obj ) {
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125         MethodKey rhs = (MethodKey)obj;
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127         return className.equals( rhs.className ) && sig.equals( rhs.sig ) && methodName.equals( rhs.methodName );
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129     }
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131   public String JavaDoc toString() {
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133
134     return className + "." + methodName + "(" + sig + ")";
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136   }
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138   public int compareTo(Object JavaDoc o) {
139     MethodKey rhs = (MethodKey) o;
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141
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143         // this method is just used to sort a method array, so it doesn't
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145         // need to be that fast...
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147         StringBuffer JavaDoc buf = new StringBuffer JavaDoc( className );
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149         buf.append( methodName );
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151         buf.append( sig );
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153
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155         StringBuffer JavaDoc rhsBuf = new StringBuffer JavaDoc( rhs.className );
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157         rhsBuf.append( rhs.methodName );
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159         rhsBuf.append( rhs.sig );
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161
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163     return buf.toString().compareTo(rhsBuf.toString());
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165     }
166 }
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