Java example source code file (MULTIANEWARRAY.java)

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Java - Java tags/keywords

allocationinstruction, arraytype, class, classgenexception, cpinstruction, exceptionthrower, invalid, ioexception, loadclass, multianewarray, objecttype, string

The MULTIANEWARRAY.java Java example source code

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package com.sun.org.apache.bcel.internal.generic;

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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

* * @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm */ 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); } }