/*
* Licensed to the Apache Software Foundation (ASF) under one or more contributor license
* agreements. See the NOTICE file distributed with this work for additional information regarding
* copyright ownership. The ASF licenses this file to You under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the License. You may obtain a
* copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software distributed under the License
* is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
* or implied. See the License for the specific language governing permissions and limitations under
* the License.
*/
package org.apache.geode.codeAnalysis.decode.cp;
import java.io.*;
import java.util.*;
public class CpUtf8 extends Cp {
private StringBuffer value;
private String stringValue;
private Vector classes;
CpUtf8(DataInputStream source) throws IOException {
int len = source.readUnsignedShort();
int idx;
value = new StringBuffer();
for (idx = 0; idx < len; idx++) {
value.append((char) source.readByte());
}
}
public String stringValue() {
if (stringValue == null)
stringValue = value.toString();
return stringValue;
}
/**
* for a method descriptor, this will return the number of argument descriptions found in the
* string
*/
public int argCount() {
if (classes == null)
decodeClassName(0);
return classes.size() - 1;
}
/**
* decode the class name of the given argument, or the final class name if the argument is zero
*/
public String decodeClassName(int argNo) {
int idx;
if (classes == null) {
classes = new Vector();
idx = 0;
while (idx >= 0)
idx = decodeNextClassName(idx);
}
if (argNo == 0)
return (String) classes.elementAt(classes.size() - 1);
else
return (String) classes.elementAt(argNo - 1);
}
private int decodeNextClassName(int startIdx) {
int idx, len;
StringBuffer str;
StringBuffer arraySpec = new StringBuffer();
idx = startIdx;
len = value.length();
if (idx >= len)
return -1;
while (value.charAt(idx) == ')' || value.charAt(idx) == '(')
idx++;
arraySpec = new StringBuffer();
while (value.charAt(idx) == '[') {
idx++;
arraySpec.append("[]");
}
switch (value.charAt(idx)) {
case 'B':
str = new StringBuffer("byte");
break;
case 'C':
str = new StringBuffer("char");
break;
case 'D':
str = new StringBuffer("double");
break;
case 'F':
str = new StringBuffer("float");
break;
case 'I':
str = new StringBuffer("int");
break;
case 'J':
str = new StringBuffer("long");
break;
case 'L':
idx += 1;
str = new StringBuffer();
while (value.charAt(idx) != ';') {
str.append(value.charAt(idx));
idx += 1;
}
break;
case 'S':
str = new StringBuffer("short");
break;
case 'Z':
str = new StringBuffer("boolean");
break;
case 'V':
str = new StringBuffer("void");
break;
default:
throw new Error("Unknown type specifier in descriptor: " + value.charAt(idx));
}
str.append(arraySpec);
classes.addElement(str.toString());
return idx + 1;
}
}