org.mrgeo.utils.Base64Utils.java Source code

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Here is the source code for org.mrgeo.utils.Base64Utils.java

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/*
 * Copyright 2009-2014 DigitalGlobe, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and limitations under the License.
 */

package org.mrgeo.utils;

import org.apache.commons.codec.binary.Base64;

import java.io.*;

public class Base64Utils {

    public static String encodeObject(Object obj) throws IOException {
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        ObjectOutputStream oos = null;
        byte[] rawBytes;
        try {
            oos = new ObjectOutputStream(baos);
            oos.writeObject(obj);
            rawBytes = baos.toByteArray();
        } catch (IOException e) {
            throw e;
        } finally {
            if (oos != null) {
                oos.close();
            }
            baos.close();
        }

        return new String(Base64.encodeBase64(rawBytes));
    }

    public static Object decodeToObject(String encoded) throws IOException, ClassNotFoundException {
        byte[] objBytes = Base64.decodeBase64(encoded.getBytes());

        ByteArrayInputStream bais = null;
        ObjectInputStream ois = null;

        try {
            bais = new ByteArrayInputStream(objBytes);
            ois = new ObjectInputStream(bais);
            Object obj = ois.readObject();

            return obj;
        } finally {
            if (ois != null) {
                ois.close();
            }
            if (bais != null) {
                bais.close();
            }
        }
    }

    public static String encodeDoubleArray(double[] noData) throws IOException {
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        ObjectOutputStream oos = null;
        byte[] rawBytes;
        try {
            oos = new ObjectOutputStream(baos);
            oos.writeInt(noData.length);
            for (int i = 0; i < noData.length; i++) {
                oos.writeDouble(noData[i]);
            }
            oos.flush();
            rawBytes = baos.toByteArray();
        } finally {
            if (oos != null) {
                oos.close();
            }
            baos.close();
        }

        return new String(Base64.encodeBase64(rawBytes));
    }

    public static double[] decodeToDoubleArray(String encoded) throws IOException {
        byte[] objBytes = Base64.decodeBase64(encoded.getBytes());

        ByteArrayInputStream bais = null;
        ObjectInputStream ois = null;

        try {
            bais = new ByteArrayInputStream(objBytes);
            ois = new ObjectInputStream(bais);
            int arrayLength = ois.readInt();
            double result[] = new double[arrayLength];
            for (int i = 0; i < arrayLength; i++) {
                result[i] = ois.readDouble();
            }
            return result;
        } finally {
            if (ois != null) {
                ois.close();
            }
            if (bais != null) {
                bais.close();
            }
        }
    }
}