com.github.steveash.jg2p.util.ReadWrite.java Source code

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Here is the source code for com.github.steveash.jg2p.util.ReadWrite.java

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/*
 * Copyright 2014 Steve Ash
 *
 * 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 com.github.steveash.jg2p.util;

import com.google.common.io.ByteSink;
import com.google.common.io.ByteSource;
import com.google.common.io.Files;
import com.google.common.io.Resources;

import java.io.File;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;

/**
 * Reads/writes single externalizeable files to disk
 * @author Steve Ash
 */
public class ReadWrite {

    public static <T> T readFromClasspath(Class<T> clazz, String resourceName)
            throws IOException, ClassNotFoundException {
        ByteSource bs = Resources.asByteSource(Resources.getResource(resourceName));
        return (T) readFromSource(bs);
    }

    public static <T> T readFromFile(Class<T> clazz, File inputFile) throws IOException, ClassNotFoundException {
        ByteSource source = Files.asByteSource(inputFile);
        return (T) readFromSource(source);
    }

    private static <T> T readFromSource(ByteSource bs) throws IOException, ClassNotFoundException {
        try (ObjectInputStream ois = new ObjectInputStream(bs.openBufferedStream())) {
            return (T) ois.readObject();
        }
    }

    public static <T> void writeTo(T model, File outputFile) throws IOException {
        ByteSink sink = Files.asByteSink(outputFile);
        try (ObjectOutputStream oos = new ObjectOutputStream(sink.openBufferedStream())) {
            oos.writeObject(model);
        }
    }

}