/*
* Copyright 2002-2005 Sun Microsystems, Inc. All Rights Reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Sun designates this
* particular file as subject to the "Classpath" exception as provided
* by Sun in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
* CA 95054 USA or visit www.sun.com if you need additional information or
* have any questions.
*/
package sun.tools.javap;
import java.util.*;
import java.io.*;
import static sun.tools.javap.RuntimeConstants.*;
/**
* Strores method data informastion.
*
* @author Sucheta Dambalkar (Adopted code from jdis)
*/
public class MethodData {
ClassData cls;
int access;
int name_index;
int descriptor_index;
int attributes_count;
byte[] code;
Vector<TrapData> exception_table = new Vector<TrapData>(0);
Vector<LineNumData> lin_num_tb = new Vector<LineNumData>(0);
Vector<LocVarData> loc_var_tb = new Vector<LocVarData>(0);
StackMapTableData[] stackMapTable;
StackMapData[] stackMap;
int[] exc_index_table=null;
Vector<AttrData> attrs=new Vector<AttrData>(0);
Vector<AttrData> code_attrs=new Vector<AttrData>(0);
int max_stack, max_locals;
boolean isSynthetic=false;
boolean isDeprecated=false;
public MethodData(ClassData cls){
this.cls=cls;
}
/**
* Read method info.
*/
public void read(DataInputStream in) throws IOException {
access = in.readUnsignedShort();
name_index=in.readUnsignedShort();
descriptor_index =in.readUnsignedShort();
int attributes_count = in.readUnsignedShort();
for (int i = 0; i < attributes_count; i++) {
int attr_name_index=in.readUnsignedShort();
readAttr: {
if (cls.getTag(attr_name_index)==CONSTANT_UTF8) {
String attr_name=cls.getString(attr_name_index);
if ( attr_name.equals("Code")){
readCode (in);
AttrData attr=new AttrData(cls);
attr.read(attr_name_index);
attrs.addElement(attr);
break readAttr;
} else if ( attr_name.equals("Exceptions")){
readExceptions(in);
AttrData attr=new AttrData(cls);
attr.read(attr_name_index);
attrs.addElement(attr);
break readAttr;
} else if (attr_name.equals("Synthetic")){
if (in.readInt()!=0)
throw new ClassFormatError("invalid Synthetic attr length");
isSynthetic=true;
AttrData attr=new AttrData(cls);
attr.read(attr_name_index);
attrs.addElement(attr);
break readAttr;
} else if (attr_name.equals("Deprecated")){
if (in.readInt()!=0)
throw new ClassFormatError("invalid Synthetic attr length");
isDeprecated = true;
AttrData attr=new AttrData(cls);
attr.read(attr_name_index);
attrs.addElement(attr);
break readAttr;
}
}
AttrData attr=new AttrData(cls);
attr.read(attr_name_index, in);
attrs.addElement(attr);
}
}
}
/**
* Read code attribute info.
*/
public void readCode(DataInputStream in) throws IOException {
int attr_length = in.readInt();
max_stack=in.readUnsignedShort();
max_locals=in.readUnsignedShort();
int codelen=in.readInt();
code=new byte[codelen];
int totalread = 0;
while(totalread < codelen){
totalread += in.read(code, totalread, codelen-totalread);
}
// in.read(code, 0, codelen);
int clen = 0;
readExceptionTable(in);
int code_attributes_count = in.readUnsignedShort();
for (int k = 0 ; k < code_attributes_count ; k++) {
int table_name_index=in.readUnsignedShort();
int table_name_tag=cls.getTag(table_name_index);
AttrData attr=new AttrData(cls);
if (table_name_tag==CONSTANT_UTF8) {
String table_name_tstr=cls.getString(table_name_index);
if (table_name_tstr.equals("LineNumberTable")) {
readLineNumTable(in);
attr.read(table_name_index);
} else if (table_name_tstr.equals("LocalVariableTable")) {
readLocVarTable(in);
attr.read(table_name_index);
} else if (table_name_tstr.equals("StackMapTable")) {
readStackMapTable(in);
attr.read(table_name_index);
} else if (table_name_tstr.equals("StackMap")) {
readStackMap(in);
attr.read(table_name_index);
} else {
attr.read(table_name_index, in);
}
code_attrs.addElement(attr);
continue;
}
attr.read(table_name_index, in);
code_attrs.addElement(attr);
}
}
/**
* Read exception table info.
*/
void readExceptionTable (DataInputStream in) throws IOException {
int exception_table_len=in.readUnsignedShort();
exception_table=new Vector<TrapData>(exception_table_len);
for (int l = 0; l < exception_table_len; l++) {
exception_table.addElement(new TrapData(in, l));
}
}
/**
* Read LineNumberTable attribute info.
*/
void readLineNumTable (DataInputStream in) throws IOException {
int attr_len = in.readInt(); // attr_length
int lin_num_tb_len = in.readUnsignedShort();
lin_num_tb=new Vector<LineNumData>(lin_num_tb_len);
for (int l = 0; l < lin_num_tb_len; l++) {
lin_num_tb.addElement(new LineNumData(in));
}
}
/**
* Read LocalVariableTable attribute info.
*/
void readLocVarTable (DataInputStream in) throws IOException {
int attr_len=in.readInt(); // attr_length
int loc_var_tb_len = in.readUnsignedShort();
loc_var_tb = new Vector<LocVarData>(loc_var_tb_len);
for (int l = 0; l < loc_var_tb_len; l++) {
loc_var_tb.addElement(new LocVarData(in));
}
}
/**
* Read Exception attribute info.
*/
public void readExceptions(DataInputStream in) throws IOException {
int attr_len=in.readInt(); // attr_length in prog
int num_exceptions = in.readUnsignedShort();
exc_index_table=new int[num_exceptions];
for (int l = 0; l < num_exceptions; l++) {
int exc=in.readShort();
exc_index_table[l]=exc;
}
}
/**
* Read StackMapTable attribute info.
*/
void readStackMapTable(DataInputStream in) throws IOException {
int attr_len = in.readInt(); //attr_length
int stack_map_tb_len = in.readUnsignedShort();
stackMapTable = new StackMapTableData[stack_map_tb_len];
for (int i=0; i<stack_map_tb_len; i++) {
stackMapTable[i] = StackMapTableData.getInstance(in, this);
}
}
/**
* Read StackMap attribute info.
*/
void readStackMap(DataInputStream in) throws IOException {
int attr_len = in.readInt(); //attr_length
int stack_map_len = in.readUnsignedShort();
stackMap = new StackMapData[stack_map_len];
for (int i = 0; i<stack_map_len; i++) {
stackMap[i] = new StackMapData(in, this);
}
}
/**
* Return access of the method.
*/
public String[] getAccess(){
Vector<String> v = new Vector<String>();
if ((access & ACC_PUBLIC) !=0) v.addElement("public");
if ((access & ACC_PRIVATE) !=0) v.addElement("private");
if ((access & ACC_PROTECTED) !=0) v.addElement("protected");
if ((access & ACC_STATIC) !=0) v.addElement("static");
if ((access & ACC_FINAL) !=0) v.addElement("final");
if ((access & ACC_SYNCHRONIZED) !=0) v.addElement("synchronized");
if ((access & ACC_NATIVE) !=0) v.addElement("native");
if ((access & ACC_ABSTRACT) !=0) v.addElement("abstract");
if ((access & ACC_STRICT) !=0) v.addElement("strictfp");
String[] accflags = new String[v.size()];
v.copyInto(accflags);
return accflags;
}
/**
* Return name of the method.
*/
public String getName(){
return cls.getStringValue(name_index);
}
/**
* Return internal siganature of the method.
*/
public String getInternalSig(){
return cls.getStringValue(descriptor_index);
}
/**
* Return java return type signature of method.
*/
public String getReturnType(){
String rttype = (new TypeSignature(getInternalSig())).getReturnType();
return rttype;
}
/**
* Return java type parameter signature.
*/
public String getParameters(){
String ptype = (new TypeSignature(getInternalSig())).getParameters();
return ptype;
}
/**
* Return code attribute data of a method.
*/
public byte[] getCode(){
return code;
}
/**
* Return LineNumberTable size.
*/
public int getnumlines(){
return lin_num_tb.size();
}
/**
* Return LineNumberTable
*/
public Vector getlin_num_tb(){
return lin_num_tb;
}
/**
* Return LocalVariableTable size.
*/
public int getloc_var_tbsize(){
return loc_var_tb.size();
}
/**
* Return LocalVariableTable.
*/
public Vector getloc_var_tb(){
return loc_var_tb;
}
/**
* Return StackMap.
*/
public StackMapData[] getStackMap() {
return stackMap;
}
/**
* Return StackMapTable.
*/
public StackMapTableData[] getStackMapTable() {
return stackMapTable;
}
/**
* Return number of arguments of that method.
*/
public int getArgumentlength(){
return new TypeSignature(getInternalSig()).getArgumentlength();
}
/**
* Return true if method is static
*/
public boolean isStatic(){
if ((access & ACC_STATIC) !=0) return true;
return false;
}
/**
* Return max depth of operand stack.
*/
public int getMaxStack(){
return max_stack;
}
/**
* Return number of local variables.
*/
public int getMaxLocals(){
return max_locals;
}
/**
* Return exception index table in Exception attribute.
*/
public int []get_exc_index_table(){
return exc_index_table;
}
/**
* Return exception table in code attributre.
*/
public Vector getexception_table(){
return exception_table;
}
/**
* Return method attributes.
*/
public Vector getAttributes(){
return attrs;
}
/**
* Return code attributes.
*/
public Vector getCodeAttributes(){
return code_attrs;
}
/**
* Return true if method id synthetic.
*/
public boolean isSynthetic(){
return isSynthetic;
}
/**
* Return true if method is deprecated.
*/
public boolean isDeprecated(){
return isDeprecated;
}
}