com.packenius.datadivider.javaclass.attr.LineNumberTableAttribute Maven / Gradle / Ivy

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package com.packenius.datadivider.javaclass.attr;

import com.packenius.dumpapi.DumpReader;

/**
 * @author Christian Packenius, 2016.
 */
public class LineNumberTableAttribute extends AttributeDescription {
    /**
     * Array mit Zeilennummereinträgen.
     */
    public final LineNumber[] lineNumbers;

    /**
     * Konstruktor.
     */
    public LineNumberTableAttribute(int length, DumpReader reader) {
        super(reader, length);

        int count = reader.readBigEndianU2("Line numbers count: ##DEC##").value;

        lineNumbers = new LineNumber[count];
        for (int i = 0; i < count; i++) {
            lineNumbers[i] = new LineNumber(reader, i);
        }

        setEndAddress(reader);
    }

    @Override
    public String getName() {
        return "LineNumberTable";
    }

    @Override
    public String toString() {
        return "Line Number Table Attribute";
    }

    @Override
    public String getDescription() {
        return "The LineNumberTable attribute is an optional variable-length attribute in the "
                + "attributes table of a Code attribute. It may be used by debuggers to "
                + "determine which part of the code array corresponds to a given line number in the "
                + "original source file. "
                + "If multiple LineNumberTable attributes are present in the attributes table of a "
                + "Code attribute, then they may appear in any order. "
                + "There may be more than one LineNumberTable attribute per line of a source file "
                + "in the attributes table of a Code attribute. That is, LineNumberTable attributes "
                + "may together represent a given line of a source file, and need not be one-to-one "
                + "with source lines.";
    }
}