com.packenius.datadivider.javaclass.cp.CpInvokeDynamic Maven / Gradle / Ivy

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package com.packenius.datadivider.javaclass.cp;

import com.packenius.datadivider.javaclass.ConstantPool;
import com.packenius.datadivider.javaclass.ConstantPoolEntryCrossPointer;
import com.packenius.dumpapi.DumpReader;
import com.packenius.dumpapi.DumpReader.BigEndianUnsigned2ByteInteger;

/**
 * @author Christian Packenius, 2016.
 */
public class CpInvokeDynamic extends ConstantPoolEntry {
    /**
     * Index auf die Tabelle der Bootstrap-Methoden.
     */
    public final int bootstrapMethodAttrIndex;

    /**
     * Name und Typ (Index).
     */
    public final int nameAndTypeIndex;

    /**
     * Konstruktor.
     */
    public CpInvokeDynamic(DumpReader reader, int id, ConstantPool constantpool) {
        super(reader, id);

        BigEndianUnsigned2ByteInteger bmrDumpBlock = reader
                .readBigEndianU2("Bootstrap method attribute index: ###DEC##");
        bmrDumpBlock.setCrossPointer(new ConstantPoolEntryCrossPointer(bmrDumpBlock.value));
        bootstrapMethodAttrIndex = bmrDumpBlock.value;

        BigEndianUnsigned2ByteInteger natDumpBlock = reader.readBigEndianU2("Name and type index: ###DEC##");
        natDumpBlock.setCrossPointer(new ConstantPoolEntryCrossPointer(natDumpBlock.value));
        nameAndTypeIndex = natDumpBlock.value;

        setEndAddress(reader);
    }

    @Override
    public String getDescription() {
        return "Constant pool entry #" + id + "\r\nInvoke dynamic constant, bootstrap method attribute #"
                + bootstrapMethodAttrIndex + ", name and type #" + nameAndTypeIndex;
    }

    @Override
    public String toString() {
        ConstantPool cp = reader.getUserObject(ConstantPool.class);
        ConstantPoolEntry bootstrapMethodAttr = cp.getEntry(bootstrapMethodAttrIndex);
        if (bootstrapMethodAttr == null) {
            return "Invoke Dynamic: " + cp.getEntry(nameAndTypeIndex).toString() + " [#" + id + "]";
        }
        return "Invoke Dynamic: " + cp.getEntry(nameAndTypeIndex).toString() + ", with Bootstrap method: "
                + bootstrapMethodAttr.toString() + " [#" + id + "]";
    }
}