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package com.sun.jdo.api.persistence.enhancer.classfile;
import java.io.*;
import java.util.Vector;
import java.util.Enumeration;
/**
* Represents the LocalVariableTable attribute within a
* method in a class file.
*/
public class LocalVariableTableAttribute extends ClassAttribute {
/* The expected attribute name */
public static final String expectedAttrName = "LocalVariableTable";//NOI18N
/* The list of local variables */
private Vector localTable;
/* public accessors */
/**
* Returns an enumeration of the local variables in the table
* Each element is a LocalVariable
*/
Enumeration variables() {
return localTable.elements();
}
/**
* Constructor for a local variable table
*/
public LocalVariableTableAttribute(
ConstUtf8 nameAttr, Vector lvarTable) {
super(nameAttr);
localTable = lvarTable;
}
/* package local methods */
static LocalVariableTableAttribute read(
ConstUtf8 attrName, DataInputStream data, CodeEnv env)
throws IOException {
int nVars = data.readUnsignedShort();
Vector lvarTable = new Vector();
while (nVars-- > 0) {
lvarTable.addElement(LocalVariable.read(data, env));
}
return new LocalVariableTableAttribute(attrName, lvarTable);
}
void write(DataOutputStream out) throws IOException {
out.writeShort(attrName().getIndex());
ByteArrayOutputStream baos = new ByteArrayOutputStream();
DataOutputStream tmp_out = new DataOutputStream(baos);
tmp_out.writeShort(localTable.size());
for (int i=0; i