org.farng.mp3.object.ObjectGroupRepeated Maven / Gradle / Ivy

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This library reads song information, such as song title, artist, and album, from an MP3 file. It supports ID3v1, ID3v1.1, Lyrics3v1, Lyrics3v2, ID3v2.2, ID3v2.3, and ID3v2.4 tags. MP3 Frame Headers can also be read. There is a FilenameTag, a ID3v2.4 tag that is intelligently derived from the file name. It contains tag synchronization utilities, multiple save options, and easy tag conversion methods.

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package org.farng.mp3.object;

import org.farng.mp3.TagUtility;

import java.util.ArrayList;
import java.util.Iterator;

/**
 * ID3v2 and Lyrics3v2 tags have individual fields AbstractMP3Fragments Then each fragment is broken down
 * in to individual AbstractMP3Objects
 *
 * @author Eric Farng
 * @version $Revision: 1.5 $
 */
public class ObjectGroupRepeated extends AbstractMP3Object {

    private ArrayList objectList;
    private ArrayList propertyList;

    /**
     * Creates a new ObjectGroupRepeated object.
     */
    public ObjectGroupRepeated(final String identifier) {
        this.identifier = identifier;
        this.propertyList = new ArrayList();
        this.objectList = new ArrayList();
    }

    /**
     * Creates a new ObjectGroupRepeated object.
     */
    public ObjectGroupRepeated(final ObjectGroupRepeated copyObject) {
        super(copyObject);
        AbstractMP3Object newObject;
        for (int i = 0; i < copyObject.objectList.size(); i++) {
            newObject = (AbstractMP3Object) TagUtility.copyObject(copyObject.objectList.get(i));
            this.objectList.add(newObject);
        }
        for (int i = 0; i < copyObject.propertyList.size(); i++) {
            newObject = (AbstractMP3Object) TagUtility.copyObject(copyObject.propertyList.get(i));
            this.propertyList.add(newObject);
        }
    }

    public ArrayList getObjectList() {
        return this.objectList;
    }

    public ArrayList getPropertyList() {
        return this.propertyList;
    }

    public int getSize() {
        int size = 0;
        AbstractMP3Object object;
        final Iterator iterator = this.objectList.listIterator();
        while (iterator.hasNext()) {
            object = (AbstractMP3Object) iterator.next();
            size += object.getSize();
        }
        return size;
    }

    public void addObject(final AbstractMP3Object object) {
        this.objectList.add(object);
    }

    public void addProperty(final AbstractMP3Object object) {
        this.propertyList.add(object);
    }

    public boolean equals(final Object obj) {
        if ((obj instanceof ObjectGroupRepeated) == false) {
            return false;
        }
        final ObjectGroupRepeated objectGroupRepeated = (ObjectGroupRepeated) obj;
        if (this.objectList.equals(objectGroupRepeated.objectList) == false) {
            return false;
        }
        if (this.propertyList.equals(objectGroupRepeated.propertyList) == false) {
            return false;
        }
        return super.equals(obj);
    }

    public void readByteArray(final byte[] arr, int offset) {
        if (arr == null) {
            throw new NullPointerException("Byte array is null");
        }
        if ((offset < 0) || (offset >= arr.length)) {
            throw new IndexOutOfBoundsException("Offset to byte array is out of bounds: offset = " +
                                                offset +
                                                ", array.length = " +
                                                arr
                                                        .length);
        }
        AbstractMP3Object object;
        Class className;
        Iterator iterator;
        if (this.propertyList.size() > 0) {
            while (offset < arr.length) {
                iterator = this.propertyList.listIterator();
                while (iterator.hasNext()) {
                    className = iterator.next().getClass();
                    try {
                        object = (AbstractMP3Object) className.newInstance();
                        this.objectList.add(object);
                        object.readByteArray(arr, offset);
                        offset += object.getSize();
                    } catch (IllegalAccessException ex) {
                        ex.printStackTrace();

                        // do nothing, just skip this one
                    } catch (InstantiationException ex) {
                        ex.printStackTrace();

                        // do nothing, just skip this one
                    }
                }
            }
        }
    }

    public String toString() {
        String str = "";
        AbstractMP3Object object;
        final Iterator iterator = this.objectList.listIterator();
        while (iterator.hasNext()) {
            object = (AbstractMP3Object) iterator.next();
            str += (object.toString() + "\n");
        }
        return str;
    }

    public byte[] writeByteArray() {
        AbstractMP3Object object;
        final byte[] totalArray = new byte[this.getSize()];
        byte[] objectArray;
        final Iterator iterator = this.objectList.listIterator();
        while (iterator.hasNext()) {
            object = (AbstractMP3Object) iterator.next();
            objectArray = object.writeByteArray();
            System.arraycopy(objectArray, 0, totalArray, 0, totalArray.length);
        }
        return totalArray;
    }
}