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144 lines
4.0 KiB
144 lines
4.0 KiB
/*
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* Copyright 2000-2014 JetBrains s.r.o.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.jetbrains.java.decompiler.struct.gen;
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import org.jetbrains.java.decompiler.code.CodeConstants;
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import java.util.ArrayList;
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import java.util.Arrays;
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import java.util.List;
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public class MethodDescriptor {
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public final VarType[] params;
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public final VarType ret;
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private MethodDescriptor(VarType[] params, VarType ret) {
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this.params = params;
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this.ret = ret;
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}
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public static MethodDescriptor parseDescriptor(String descriptor) {
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int parenth = descriptor.lastIndexOf(')');
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if (descriptor.length() < 2 || parenth < 0 || descriptor.charAt(0) != '(') {
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throw new IllegalArgumentException("Invalid descriptor: " + descriptor);
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}
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VarType[] params;
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if (parenth > 1) {
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String parameters = descriptor.substring(1, parenth);
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List<String> lst = new ArrayList<String>();
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int indexFrom = -1, ind, len = parameters.length(), index = 0;
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while (index < len) {
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switch (parameters.charAt(index)) {
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case '[':
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if (indexFrom < 0) {
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indexFrom = index;
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}
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break;
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case 'L':
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ind = parameters.indexOf(";", index);
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lst.add(parameters.substring(indexFrom < 0 ? index : indexFrom, ind + 1));
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index = ind;
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indexFrom = -1;
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break;
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default:
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lst.add(parameters.substring(indexFrom < 0 ? index : indexFrom, index + 1));
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indexFrom = -1;
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}
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index++;
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}
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params = new VarType[lst.size()];
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for (int i = 0; i < lst.size(); i++) {
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params[i] = new VarType(lst.get(i));
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}
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}
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else {
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params = VarType.EMPTY_ARRAY;
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}
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VarType ret = new VarType(descriptor.substring(parenth + 1));
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return new MethodDescriptor(params, ret);
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}
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public String buildNewDescriptor(NewClassNameBuilder builder) {
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boolean updated = false;
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VarType[] newParams;
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if (params.length > 0) {
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newParams = new VarType[params.length];
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System.arraycopy(params, 0, newParams, 0, params.length);
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for (int i = 0; i < params.length; i++) {
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VarType substitute = buildNewType(params[i], builder);
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if (substitute != null) {
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newParams[i] = substitute;
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updated = true;
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}
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}
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}
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else {
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newParams = VarType.EMPTY_ARRAY;
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}
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VarType newRet = ret;
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VarType substitute = buildNewType(ret, builder);
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if (substitute != null) {
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newRet = substitute;
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updated = true;
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}
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if (updated) {
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StringBuilder res = new StringBuilder("(");
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for (VarType param : newParams) {
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res.append(param);
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}
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res.append(")").append(newRet.toString());
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return res.toString();
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}
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return null;
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}
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private static VarType buildNewType(VarType type, NewClassNameBuilder builder) {
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if (type.type == CodeConstants.TYPE_OBJECT) {
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String newClassName = builder.buildNewClassname(type.value);
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if (newClassName != null) {
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return new VarType(type.type, type.arrayDim, newClassName);
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}
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}
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return null;
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}
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@Override
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public boolean equals(Object o) {
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if (o == this) return true;
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if (o == null || !(o instanceof MethodDescriptor)) return false;
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MethodDescriptor md = (MethodDescriptor)o;
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return ret.equals(md.ret) && Arrays.equals(params, md.params);
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}
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@Override
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public int hashCode() {
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int result = ret.hashCode();
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result = 31 * result + params.length;
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return result;
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}
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}
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