Drawing.java

package fr.tvbarthel.apps.sayitfromthesky.models;

import android.os.Parcel;
import android.os.Parcelable;

import com.google.android.gms.maps.model.LatLng;
import com.google.maps.android.PolyUtil;
import com.google.maps.android.SphericalUtil;

import java.util.ArrayList;
import java.util.List;

/**
 * A simple data class that represents a drawing.
 */
public final class Drawing implements Parcelable {

    public static final Drawing EMPTY = new Drawing("empty_drawing", 0, new ArrayList<String>());
    public static final int NON_VALID_ID = -1;

    private int mId;
    private String mTitle;
    private long mCreationTimeInMillis;
    private List<String> mEncodedPolylines;
    private double mLength;

    public Drawing(String title, long creationTimeInMillis, List<String> encodedPolylines) {
        mId = NON_VALID_ID;
        mTitle = title;
        mCreationTimeInMillis = creationTimeInMillis;
        mEncodedPolylines = encodedPolylines;
        mLength = computeDrawingLength();
    }

    /**
     * Compute the length of the drawing in meters.
     *
     * @return the length of the drawing in meters.
     */
    private double computeDrawingLength() {
        double length = 0d;
        for (String encodedPath : mEncodedPolylines) {
            final List<LatLng> path = PolyUtil.decode(encodedPath);
            length += SphericalUtil.computeLength(path);
        }
        return length;
    }

    public Drawing(Parcel in) {
        readFromParcel(in);
        mLength = computeDrawingLength();
    }

    public String getTitle() {
        return mTitle;
    }

    public long getCreationTimeInMillis() {
        return mCreationTimeInMillis;
    }

    public List<String> getEncodedPolylines() {
        return mEncodedPolylines;
    }

    public int getId() {
        return mId;
    }

    public void setId(int id) {
        mId = id;
    }

    public double getLength() {
        return mLength;
    }


    @Override
    public int describeContents() {
        return 0;
    }

    @Override
    public void writeToParcel(Parcel dest, int flags) {
        dest.writeInt(mId);
        dest.writeString(mTitle);
        dest.writeLong(mCreationTimeInMillis);
        dest.writeStringList(mEncodedPolylines);
    }

    public void readFromParcel(Parcel in) {
        mId = in.readInt();
        mTitle = in.readString();
        mCreationTimeInMillis = in.readLong();
        mEncodedPolylines = new ArrayList<String>();
        in.readStringList(mEncodedPolylines);
    }

    public static final Parcelable.Creator<Drawing> CREATOR
            = new Parcelable.Creator<Drawing>() {
        public Drawing createFromParcel(Parcel in) {
            return new Drawing(in);
        }

        public Drawing[] newArray(int size) {
            return new Drawing[size];
        }
    };
}