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package org.codehaus.plexus.util.io;

/*
 * Copyright The Codehaus Foundation.
 *
 * 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.
 */

import java.io.File;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.io.StringWriter;
import java.nio.charset.Charset;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.Arrays;
import java.util.Objects;

/**
 * Caching Writer to avoid overwriting a file with
 * the same content.
 */
public class CachingWriter extends OutputStreamWriter
{
    private final CachingOutputStream cos;

    public CachingWriter( File path, Charset charset ) throws IOException
    {
        this( Objects.requireNonNull( path ).toPath(), charset );
    }

    public CachingWriter( Path path, Charset charset ) throws IOException
    {
        this( path, charset, 32 * 1024 );
    }

    public CachingWriter( Path path, Charset charset, int bufferSize ) throws IOException
    {
        this( new CachingOutputStream( path, bufferSize ), charset );
    }

    private CachingWriter( CachingOutputStream outputStream, Charset charset ) throws IOException
    {
        super( outputStream, charset );
        this.cos = outputStream;
    }

    public boolean isModified()
    {
        return cos.isModified();
    }
}