/*
* reserved comment block
* DO NOT REMOVE OR ALTER!
*/
package com.sun.org.apache.bcel.internal.generic;
/* ====================================================================
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* Alternately, this acknowledgment may appear in the software itself,
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*
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* individuals on behalf of the Apache Software Foundation. For more
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import java.io.*;
import com.sun.org.apache.bcel.internal.util.ByteSequence;
import com.sun.org.apache.bcel.internal.classfile.ConstantPool;
import com.sun.org.apache.bcel.internal.ExceptionConstants;
/**
* MULTIANEWARRAY - Create new mutidimensional array of references
* <PRE>Stack: ..., count1, [count2, ...] -> ..., arrayref</PRE>
*
* @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A>
*/
public class MULTIANEWARRAY extends CPInstruction implements LoadClass, AllocationInstruction, ExceptionThrower {
private short dimensions;
/**
* Empty constructor needed for the Class.newInstance() statement in
* Instruction.readInstruction(). Not to be used otherwise.
*/
MULTIANEWARRAY() {}
public MULTIANEWARRAY(int index, short dimensions) {
super(com.sun.org.apache.bcel.internal.Constants.MULTIANEWARRAY, index);
if(dimensions < 1)
throw new ClassGenException("Invalid dimensions value: " + dimensions);
this.dimensions = dimensions;
length = 4;
}
/**
* Dump instruction as byte code to stream out.
* @param out Output stream
*/
public void dump(DataOutputStream out) throws IOException {
out.writeByte(opcode);
out.writeShort(index);
out.writeByte(dimensions);
}
/**
* Read needed data (i.e., no. dimension) from file.
*/
protected void initFromFile(ByteSequence bytes, boolean wide)
throws IOException
{
super.initFromFile(bytes, wide);
dimensions = bytes.readByte();
length = 4;
}
/**
* @return number of dimensions to be created
*/
public final short getDimensions() { return dimensions; }
/**
* @return mnemonic for instruction
*/
public String toString(boolean verbose) {
return super.toString(verbose) + " " + index + " " + dimensions;
}
/**
* @return mnemonic for instruction with symbolic references resolved
*/
public String toString(ConstantPool cp) {
return super.toString(cp) + " " + dimensions;
}
/**
* Also works for instructions whose stack effect depends on the
* constant pool entry they reference.
* @return Number of words consumed from stack by this instruction
*/
public int consumeStack(ConstantPoolGen cpg) { return dimensions; }
public Class[] getExceptions() {
Class[] cs = new Class[2 + ExceptionConstants.EXCS_CLASS_AND_INTERFACE_RESOLUTION.length];
System.arraycopy(ExceptionConstants.EXCS_CLASS_AND_INTERFACE_RESOLUTION, 0,
cs, 0, ExceptionConstants.EXCS_CLASS_AND_INTERFACE_RESOLUTION.length);
cs[ExceptionConstants.EXCS_CLASS_AND_INTERFACE_RESOLUTION.length+1] = ExceptionConstants.NEGATIVE_ARRAY_SIZE_EXCEPTION;
cs[ExceptionConstants.EXCS_CLASS_AND_INTERFACE_RESOLUTION.length] = ExceptionConstants.ILLEGAL_ACCESS_ERROR;
return cs;
}
public ObjectType getLoadClassType(ConstantPoolGen cpg) {
Type t = getType(cpg);
if (t instanceof ArrayType){
t = ((ArrayType) t).getBasicType();
}
return (t instanceof ObjectType)? (ObjectType) t : null;
}
/**
* 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
*/
public void accept(Visitor v) {
v.visitLoadClass(this);
v.visitAllocationInstruction(this);
v.visitExceptionThrower(this);
v.visitTypedInstruction(this);
v.visitCPInstruction(this);
v.visitMULTIANEWARRAY(this);
}
}