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92 lines
2.6 KiB
92 lines
2.6 KiB
/* Reference Copyright (C) 1999 Jochen Hoenicke.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; see the file COPYING. If not, write to
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* the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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* $Id$
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*/
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package jode.bytecode;
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///#ifdef JDK12
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///import java.lang.ref.WeakReference;
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///import java.lang.ref.ReferenceQueue;
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///#endif
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import java.util.*;
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/**
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* This class represents a field or method reference.
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*/
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public class Reference {
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/**
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* The reference string. This is the class name, the member name and
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* the member type, all separated by a space.
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*/
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private final String sig;
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/**
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* The position of the first and second space in the reference
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* string.
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*/
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private final int firstSpace, secondSpace;
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///#ifdef JDK12
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/// private static final Map references = new HashMap();
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///#else
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private static final Hashtable references = new Hashtable();
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///#endif
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public static Reference getReference(String className,
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String name, String type) {
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String sig = className+" "+name+" "+type;
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///#ifdef JDK12
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/// WeakReference ref = (WeakReference) references.get(sig);
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/// Reference reference = (ref == null) ? null : (Reference) ref.get();
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///#else
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Reference reference = (Reference) references.get(sig);
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///#endif
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if (reference == null) {
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sig = sig.intern();
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int firstSpace = className.length();
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int secondSpace = firstSpace + name.length() + 1;
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reference = new Reference(sig, firstSpace, secondSpace);
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///#ifdef JDK12
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/// references.put(sig, new WeakReference(reference));
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///#else
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references.put(sig, reference);
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///#endif
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}
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return reference;
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}
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private Reference(String sig, int first, int second) {
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this.sig = sig;
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this.firstSpace = first;
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this.secondSpace = second;
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}
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public String getClazz() {
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return sig.substring(0, firstSpace);
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}
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public String getName() {
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return sig.substring(firstSpace + 1, secondSpace);
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}
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public String getType() {
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return sig.substring(secondSpace + 1);
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}
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public String toString() {
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return sig;
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}
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}
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