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/* FJBG -- Fast Java Bytecode Generator
* Copyright 2002-2013 LAMP/EPFL
* @author Michel Schinz
*/
package ch.epfl.lamp.fjbg;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
/**
* Abstract superclass for a Java field or method.
*
* No two methods of fields in one class file may have the same name and
* descriptor. See sections 4.6 and 4.7 of the JVM specification.
*
* @author Michel Schinz
* @version 1.0
*/
abstract public class JFieldOrMethod extends JMember {
protected final JClass owner;
protected final JType type;
protected final int nameIndex, signatureIndex;
protected JFieldOrMethod(FJBGContext context,
JClass owner,
int accessFlags,
String name,
JType type) {
super(context, accessFlags, name);
this.owner = owner;
this.type = type;
nameIndex = owner.pool.addUtf8(name);
signatureIndex = owner.pool.addUtf8(type.getSignature());
}
protected JFieldOrMethod(FJBGContext context,
JClass owner,
DataInputStream stream)
throws IOException {
super(context);
this.owner = owner;
this.accessFlags = stream.readShort();
this.nameIndex = stream.readShort();
this.name = owner.pool.lookupUtf8(nameIndex);
this.signatureIndex = stream.readShort();
this.type = JType.parseSignature(owner.pool.lookupUtf8(signatureIndex));
this.attributes.addAll(JAttribute.readFrom(context, owner, this, stream));
}
public void freeze() throws JCode.OffsetTooBigException {
assert !frozen;
frozen = true;
}
public JClass getOwner() { return owner; }
public JType getType() { return type; }
public JClass getJClass() { return owner; }
public boolean isPublic() {
return (accessFlags & JAccessFlags.ACC_PUBLIC) != 0;
}
public boolean isPrivate() {
return (accessFlags & JAccessFlags.ACC_PRIVATE) != 0;
}
public boolean isProtected() {
return (accessFlags & JAccessFlags.ACC_PROTECTED) != 0;
}
public boolean isStatic() {
return (accessFlags & JAccessFlags.ACC_STATIC) != 0;
}
public boolean isFinal() {
return (accessFlags & JAccessFlags.ACC_FINAL) != 0;
}
public boolean isSuper() {
return (accessFlags & JAccessFlags.ACC_SUPER) != 0;
}
public boolean isVolatile() {
return (accessFlags & JAccessFlags.ACC_VOLATILE) != 0;
}
public boolean isTransient() {
return (accessFlags & JAccessFlags.ACC_TRANSIENT) != 0;
}
public boolean isNative() {
return (accessFlags & JAccessFlags.ACC_NATIVE) != 0;
}
public boolean isInterface() {
return (accessFlags & JAccessFlags.ACC_INTERFACE) != 0;
}
public boolean isAbstract() {
return (accessFlags & JAccessFlags.ACC_ABSTRACT) != 0;
}
public boolean isStrict() {
return (accessFlags & JAccessFlags.ACC_STRICT) != 0;
}
// 1.5 specifics
public boolean isBridge() {
return (accessFlags & JAccessFlags.ACC_BRIDGE) != 0;
}
public boolean hasVarargs() {
return (accessFlags & JAccessFlags.ACC_VARARGS) != 0;
}
public void writeTo(DataOutputStream stream) throws IOException {
if (! frozen) {
try {
freeze();
}
catch (JCode.OffsetTooBigException e) {
throw new Error(e);
}
}
stream.writeShort(accessFlags);
stream.writeShort(nameIndex);
stream.writeShort(signatureIndex);
JAttribute.writeTo(getAttributes(), stream);
}
}
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