/*
* reserved comment block
* DO NOT REMOVE OR ALTER!
*/
package com.sun.org.apache.bcel.internal.classfile;
/* ====================================================================
* The Apache Software License, Version 1.1
*
* Copyright (c) 2001 The Apache Software Foundation. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution,
* if any, must include the following acknowledgment:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowledgment may appear in the software itself,
* if and wherever such third-party acknowledgments normally appear.
*
* 4. The names "Apache" and "Apache Software Foundation" and
* "Apache BCEL" must not be used to endorse or promote products
* derived from this software without prior written permission. For
* written permission, please contact apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache",
* "Apache BCEL", nor may "Apache" appear in their name, without
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* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*/
import com.sun.org.apache.bcel.internal.Constants;
import com.sun.org.apache.bcel.internal.generic.Type;
import java.io.*;
/**
* This class represents the field info structure, i.e., the representation
* for a variable in the class. See JVM specification for details.
*
* @version $Id: Field.java,v 1.1.2.1 2005/07/31 23:46:32 jeffsuttor Exp $
* @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A>
*/
public final class Field extends FieldOrMethod {
/**
* Initialize from another object. Note that both objects use the same
* references (shallow copy). Use clone() for a physical copy.
*/
public Field(Field c) {
super(c);
}
/**
* Construct object from file stream.
* @param file Input stream
*/
Field(DataInputStream file, ConstantPool constant_pool)
throws IOException, ClassFormatException
{
super(file, constant_pool);
}
/**
* @param access_flags Access rights of field
* @param name_index Points to field name in constant pool
* @param signature_index Points to encoded signature
* @param attributes Collection of attributes
* @param constant_pool Array of constants
*/
public Field(int access_flags, int name_index, int signature_index,
Attribute[] attributes, ConstantPool constant_pool)
{
super(access_flags, name_index, signature_index, attributes, constant_pool);
}
/**
* Called by objects that are traversing the nodes of the tree implicitely
* defined by the contents of a Java class. I.e., the hierarchy of methods,
* fields, attributes, etc. spawns a tree of objects.
*
* @param v Visitor object
*/
public void accept(Visitor v) {
v.visitField(this);
}
/**
* @return constant value associated with this field (may be null)
*/
public final ConstantValue getConstantValue() {
for(int i=0; i < attributes_count; i++)
if(attributes[i].getTag() == Constants.ATTR_CONSTANT_VALUE)
return (ConstantValue)attributes[i];
return null;
}
/**
* Return string representation close to declaration format,
* `public static final short MAX = 100', e.g..
*
* @return String representation of field, including the signature.
*/
public final String toString() {
String name, signature, access; // Short cuts to constant pool
// Get names from constant pool
access = Utility.accessToString(access_flags);
access = access.equals("")? "" : (access + " ");
signature = Utility.signatureToString(getSignature());
name = getName();
StringBuffer buf = new StringBuffer(access + signature + " " + name);
ConstantValue cv = getConstantValue();
if(cv != null)
buf.append(" = " + cv);
for(int i=0; i < attributes_count; i++) {
Attribute a = attributes[i];
if(!(a instanceof ConstantValue))
buf.append(" [" + a.toString() + "]");
}
return buf.toString();
}
/**
* @return deep copy of this field
*/
public final Field copy(ConstantPool constant_pool) {
return (Field)copy_(constant_pool);
}
/**
* @return type of field
*/
public Type getType() {
return Type.getReturnType(getSignature());
}
}