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INVOKEINTERFACE.javaAPI DocJava SE 5 API6226Fri Aug 26 14:55:22 BST 2005com.sun.org.apache.bcel.internal.generic

INVOKEINTERFACE

public final class INVOKEINTERFACE extends InvokeInstruction
INVOKEINTERFACE - Invoke interface method 
Stack: ..., objectref, [arg1, [arg2 ...]] -> ...
version
$Id: INVOKEINTERFACE.java,v 1.1.1.1 2001/10/29 20:00:16 jvanzyl Exp $
author
M. Dahm

Fields Summary
private int
nargs
Constructors Summary
INVOKEINTERFACE()
Empty constructor needed for the Class.newInstance() statement in Instruction.readInstruction(). Not to be used otherwise.

public INVOKEINTERFACE(int index, int nargs)
    super(Constants.INVOKEINTERFACE, index);
    length = 5;

    if(nargs < 1)
      throw new ClassGenException("Number of arguments must be > 0 " + nargs);

    this.nargs = nargs;
  
Methods Summary
public voidaccept(com.sun.org.apache.bcel.internal.generic.Visitor v)
Call corresponding visitor method(s). The order is:
Call visitor methods of implemented interfaces first, then
call methods according to the class hierarchy in descending order,
i.e., the most specific visitXXX() call comes last.
param
v Visitor object
    v.visitExceptionThrower(this);
    v.visitTypedInstruction(this);
    v.visitStackConsumer(this);
    v.visitStackProducer(this);
    v.visitLoadClass(this);
    v.visitCPInstruction(this);
    v.visitFieldOrMethod(this);
    v.visitInvokeInstruction(this);
    v.visitINVOKEINTERFACE(this);
  
public intconsumeStack(com.sun.org.apache.bcel.internal.generic.ConstantPoolGen cpg)
 // nargs is given in byte-code
    return nargs;  // nargs includes this reference
  
public voiddump(java.io.DataOutputStream out)
Dump instruction as byte code to stream out.
param
out Output stream
    out.writeByte(opcode);
    out.writeShort(index);
    out.writeByte(nargs);
    out.writeByte(0);
  
public intgetCount()
The count argument according to the Java Language Specification,
Second Edition.
 return nargs; 
public java.lang.Class[]getExceptions()
    Class[] cs = new Class[4 + ExceptionConstants.EXCS_INTERFACE_METHOD_RESOLUTION.length];

    System.arraycopy(ExceptionConstants.EXCS_INTERFACE_METHOD_RESOLUTION, 0,
		     cs, 0, ExceptionConstants.EXCS_INTERFACE_METHOD_RESOLUTION.length);

    cs[ExceptionConstants.EXCS_INTERFACE_METHOD_RESOLUTION.length+3] = ExceptionConstants.INCOMPATIBLE_CLASS_CHANGE_ERROR;
    cs[ExceptionConstants.EXCS_INTERFACE_METHOD_RESOLUTION.length+2] = ExceptionConstants.ILLEGAL_ACCESS_ERROR;
    cs[ExceptionConstants.EXCS_INTERFACE_METHOD_RESOLUTION.length+1] = ExceptionConstants.ABSTRACT_METHOD_ERROR;
    cs[ExceptionConstants.EXCS_INTERFACE_METHOD_RESOLUTION.length]   = ExceptionConstants.UNSATISFIED_LINK_ERROR;

    return cs;
  
protected voidinitFromFile(com.sun.org.apache.bcel.internal.util.ByteSequence bytes, boolean wide)
Read needed data (i.e., index) from file.
    super.initFromFile(bytes, wide);

    length = 5;
    nargs = bytes.readUnsignedByte();
    bytes.readByte(); // Skip 0 byte
  
public java.lang.StringtoString(com.sun.org.apache.bcel.internal.classfile.ConstantPool cp)
return
mnemonic for instruction with symbolic references resolved
    return super.toString(cp) + " " + nargs;