com.onespatial.dwglib.objects.LayerControlObj Maven / Gradle / Ivy

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dwg-lib is a Java library for reading AutoCad files version 2010 and later

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package com.onespatial.dwglib.objects;

import java.util.AbstractList;
import java.util.List;

import com.onespatial.dwglib.FileVersion;
import com.onespatial.dwglib.bitstreams.BitBuffer;
import com.onespatial.dwglib.bitstreams.Handle;

public class LayerControlObj extends NonEntityObject {

    public Handle[] layerObjectHandles;

    public LayerControlObj(ObjectMap objectMap) {
        super(objectMap);
    }

    @Override
    public void readObjectTypeSpecificData(BitBuffer dataStream, BitBuffer stringStream, BitBuffer handleStream,
            FileVersion fileVersion) {
        // 19.4.51 LAYER CONTROL (50) page 157

        int numentries = dataStream.getBL();

        // The handles

        layerObjectHandles = new Handle[numentries];
        for (int i = 0; i < numentries; i++) {
            layerObjectHandles[i] = handleStream.getHandle(handleOfThisObject);
        }

        handleStream.advanceToByteBoundary();

        dataStream.assertEndOfStream();
        stringStream.assertEndOfStream();
        handleStream.assertEndOfStream();
    }

    @Override
    public String toString() {
        return "LAYER CONTROL OBJ";
    }

    public List getLayers() {
        return new AbstractList() {

            @Override
            public Layer get(int index) {
                CadObject result = objectMap.parseObjectPossiblyNull(layerObjectHandles[index]);
                return (Layer) result;
            }

            @Override
            public int size() {
                return layerObjectHandles.length;
            }
        };
    }

}