de.fanero.uncompress.stream.OneEntryArchiveInputStream.java Source code

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Here is the source code for de.fanero.uncompress.stream.OneEntryArchiveInputStream.java

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/*
* Copyright (C) 2014 Robert Khne
*
* 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 de.fanero.uncompress.stream;

import com.google.common.io.Closeables;
import org.apache.commons.compress.archivers.ArchiveEntry;
import org.apache.commons.compress.archivers.ArchiveInputStream;

import java.io.IOException;
import java.io.InputStream;

/**
 * @author Robert Khne
 */
public class OneEntryArchiveInputStream extends ArchiveInputStream {

    private InputStream in;
    private ArchiveEntry archiveEntry;

    public OneEntryArchiveInputStream(InputStream in, ArchiveEntry archiveEntry) {
        this.in = in;
        this.archiveEntry = archiveEntry;
    }

    @Override
    public ArchiveEntry getNextEntry() throws IOException {

        Closeables.closeQuietly(in);
        ArchiveEntry entry = archiveEntry;
        archiveEntry = null;
        in = EmptyArchiveInputStream.getInstance();
        return entry;
    }

    @Override
    public int read() throws IOException {
        return in.read();
    }

    @Override
    public int read(byte[] b) throws IOException {
        return in.read(b);
    }

    @Override
    public int read(byte[] b, int off, int len) throws IOException {
        return in.read(b, off, len);
    }

    @Override
    public long skip(long n) throws IOException {
        return in.skip(n);
    }

    @Override
    public int available() throws IOException {
        return in.available();
    }

    @Override
    public void close() throws IOException {
        in.close();
    }

    @Override
    public void mark(int readlimit) {
        in.mark(readlimit);
    }

    @Override
    public void reset() throws IOException {
        in.reset();
    }

    @Override
    public boolean markSupported() {
        return in.markSupported();
    }
}