98 lines
2.7 KiB
Java
98 lines
2.7 KiB
Java
/*******************************************************************************
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* Copyright (c) 2002 - 2006 IBM Corporation.
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* All rights reserved. This program and the accompanying materials
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* are made available under the terms of the Eclipse Public License v1.0
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* which accompanies this distribution, and is available at
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* http://www.eclipse.org/legal/epl-v10.html
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*
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* Contributors:
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* IBM Corporation - initial API and implementation
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*******************************************************************************/
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package com.ibm.wala.types;
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import java.util.HashMap;
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import java.util.Map;
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import com.ibm.wala.classLoader.Language;
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import com.ibm.wala.util.strings.Atom;
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/**
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* A method selector; something like: foo(Ljava/lang/String;)Ljava/lang/Class;
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*
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* TODO: Canonicalize these?
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*/
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public final class Selector {
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private final Atom name;
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private final Descriptor descriptor;
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private final String s;
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private static final Map<String,Selector> CACHE = new HashMap<String,Selector>();
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public static Selector make(String selectorStr) {
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Selector ret = CACHE.get(selectorStr);
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if (ret == null) {
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ret = make(Language.JAVA, selectorStr);
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CACHE.put(selectorStr, ret);
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}
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return ret;
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}
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public static Selector make(Language l, String selectorStr) {
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if (selectorStr == null) {
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throw new IllegalArgumentException("null selectorStr");
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}
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try {
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String methodName = selectorStr.substring(0, selectorStr.indexOf('('));
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String desc = selectorStr.substring(selectorStr.indexOf('('));
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return new Selector(Atom.findOrCreateUnicodeAtom(methodName), Descriptor.findOrCreateUTF8(l, desc));
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} catch (StringIndexOutOfBoundsException e) {
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throw new IllegalArgumentException("invalid selectorStr: " + selectorStr);
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}
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}
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public Selector(Atom name, Descriptor descriptor) {
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this.name = name;
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this.descriptor = descriptor;
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this.s = name.toString() + descriptor.toString();
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if (name == null) {
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throw new IllegalArgumentException("null name");
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}
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if (descriptor == null) {
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throw new IllegalArgumentException("null descriptor");
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}
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}
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@Override
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public boolean equals(Object obj) {
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// using instanceof is OK because Selector is final
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if (obj instanceof Selector) {
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Selector other = (Selector) obj;
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return name.equals(other.name) && descriptor.equals(other.descriptor);
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} else {
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return false;
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}
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}
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@Override
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public int hashCode() {
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return 19 * name.hashCode() + descriptor.hashCode();
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}
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@Override
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public String toString() {
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return s;
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}
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public Descriptor getDescriptor() {
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return descriptor;
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}
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public Atom getName() {
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return name;
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}
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}
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