/*
*
*
* Copyright 1990-2007 Sun Microsystems, Inc. All Rights Reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER
*
* This program 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.
*
* This program 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 at /legal/license.txt).
*
* 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 or visit www.sun.com if you need additional
* information or have any questions.
*/
package vm;
import components.*;
import util.*;
import jcc.Const;
/*
* An array is a class.
* It is a subclass of java.lang.Object.
* It has all the class-related runtime data structures, or at least
* may of them.
* It is not read in from class files, but is made up on-the-fly
* when the classresolver sees a reference to a classname starting with
* "[".
*
* In order to resolve such references early, we must do likewise here.
*/
public
class ArrayClassInfo extends ClassInfo {
private static int nFake = 0;
public int arrayClassNumber;
public int depth;
public int baseType;
public String baseName;
public ClassConstant baseClass;
public ClassConstant subarrayClass;
/*
* Given signature s,
* fill in
* depth ( i.e. number of opening [ )
* basetype ( i.e. thing after the last [ )
* and baseClass ( if basetype is a classtype )
*/
private void fillInTypeInfo( String s ) throws DataFormatException {
int index = 0;
char c;
while( ( c = s.charAt( index ) ) == Const.SIGC_ARRAY )
index++;
depth = index;
switch( c ){
case Const.SIGC_INT:
baseType = Const.T_INT;
baseName = "Int";
break;
case Const.SIGC_LONG:
baseType = Const.T_LONG;
baseName = "Long";
break;
case Const.SIGC_FLOAT:
baseType = Const.T_FLOAT;
baseName = "Float";
break;
case Const.SIGC_DOUBLE:
baseType = Const.T_DOUBLE;
baseName = "Double";
break;
case Const.SIGC_BOOLEAN:
baseType = Const.T_BOOLEAN;
baseName = "Boolean";
break;
case Const.SIGC_BYTE:
baseType = Const.T_BYTE;
baseName = "Byte";
break;
case Const.SIGC_CHAR:
baseType = Const.T_CHAR;
baseName = "Char";
break;
case Const.SIGC_SHORT:
baseType = Const.T_SHORT;
baseName = "Short";
break;
case Const.SIGC_CLASS:
baseType = Const.T_CLASS;
int start = ++index;
while (s.charAt(index) != Const.SIGC_ENDCLASS) {
index++;
}
baseClass = new ClassConstant(
new UnicodeConstant( s.substring( start, index ) )
);
break;
default:
throw new DataFormatException(Localizer.getString("arrayclassinfo.malformed_array_type_string.dataformatexception",s));
}
// For EVM, we want to know the sub-class, which is different from
// the base class.
if ( depth > 1 ){
subarrayClass = new ClassConstant( new UnicodeConstant( s.substring(1) ) );
} else if ( (depth == 1 ) && ( baseClass != null ) ){
subarrayClass = baseClass;
}
}
private void fakeConstantPool(){
// 0 -- unused
// 1 -- depth as integer
// 2 -- base type tag as integer
// 3 -- base class ref, if a ref type
// 4 -- subarray class ref, if depth > 1
// base type if depth==1 && its a class ref array type
// 5 -- self class ref
// 6 -- UTF8 for entry 3
// 7 -- UTF8 for entry 4
// 8 -- UTF8 for entry 5
// MAKE A CHANGE FOR KVM
if (false) {
int nconstants = 9;
constants = new ConstantObject[nconstants];
constants[1] = new SingleValueConstant( depth );
constants[2] = new SingleValueConstant( baseType );
if ( baseClass == null ){
constants[3] = new SingleValueConstant( 0 );
constants[6] = new SingleValueConstant( 0 );
} else {
constants[3] = baseClass;
constants[6] = baseClass.name;
}
// for EVM, point at the subarray type.
if ( subarrayClass == null ){
constants[4] = new SingleValueConstant( 0 );
constants[7] = new SingleValueConstant( 0 );
} else {
constants[4] = subarrayClass;
constants[7] = subarrayClass.name;
}
constants[5] = thisClass; // EVM 4 => 5
constants[8] = thisClass.name; // EVM 5 => 7
} else {
int nconstants = 2;
constants = new ConstantObject[nconstants];
if (subarrayClass == null) {
constants[1] = new SingleValueConstant(baseType);
} else {
constants[1] = subarrayClass;
}
}
}
public ArrayClassInfo( boolean v, String s ) throws DataFormatException {
super(v);
arrayClassNumber = nFake++;
fillInTypeInfo( s );
className = s;
thisClass = new ClassConstant( new UnicodeConstant( s ) );
superClassInfo = lookupClass(/*NOI18N*/"java/lang/Object");
superClass = superClassInfo.thisClass;
access = Const.ACC_FINAL|Const.ACC_ABSTRACT|Const.ACC_PUBLIC;
fakeConstantPool();
methods = new MethodInfo[0];
fields = new FieldInfo[0];
enterClass( s );
}
public boolean
countReferences( boolean v ){
// some entries are magic. The others
// can get shared or whacked.
if (false) {
constants[1].incReference(); // depth
constants[2].incReference(); // baseType code
constants[3].incReference(); // base class pointer
constants[4].incReference(); // subarray class pointer
} else {
constants[1].incReference(); // base type
}
return super.countReferences( v );
}
public void
externalize( ConstantPool p ){
if (verbose){
log.println(Localizer.getString("arrayclassinfo.externalizing_class", className));
}
externalizeConstants( p );
// DONT DO THISthisClass = (ClassConstant)p.dup( thisClass );
if ( superClass != null ){
superClass = (ClassConstant)p.dup( superClass );
// THIS SHOULD WORK.
}
}
protected String createGenericNativeName() {
return /*NOI18N*/"fakeArray" + arrayClassNumber;
}
}
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