com.github.n_i_e.dirtreedb.ApacheCompressArchiveLister.java Source code

Introduction

Here is the source code for com.github.n_i_e.dirtreedb.ApacheCompressArchiveLister.java

Source

/*
 * Copyright 2015 Namihiko Matsumura (https://github.com/n-i-e/)
 *
 * 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.n_i_e.dirtreedb;

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

import org.apache.commons.compress.archivers.ArchiveEntry;
import org.apache.commons.compress.archivers.ArchiveException;
import org.apache.commons.compress.archivers.ArchiveInputStream;
import org.apache.commons.compress.archivers.ArchiveStreamFactory;

public class ApacheCompressArchiveLister extends AbstractArchiveLister {
    private ArchiveInputStream instream;

    public ApacheCompressArchiveLister(PathEntry basepath, InputStream inf) throws IOException {
        super(basepath);
        Assertion.assertNullPointerException(inf != null);
        Assertion.assertAssertionError(inf.markSupported());
        try {
            instream = new ArchiveStreamFactory().createArchiveInputStream(inf);
        } catch (ArchiveException e) {
            throw new IOException(e.toString());
        }
    }

    @Override
    public InputStream getInputStream() {
        return instream;
    }

    @Override
    protected PathEntry getNext() throws IOException {
        ArchiveEntry z = instream.getNextEntry();
        if (z == null) {
            return null;
        }
        int newtype = z.isDirectory() ? PathEntry.COMPRESSEDFOLDER : PathEntry.COMPRESSEDFILE;
        String s = z.getName();
        s = s.replace("\\", "/");
        PathEntry next_entry = new PathEntry(getBasePath().getPath() + "/" + s, newtype);
        next_entry.setDateLastModified(z.getLastModifiedDate().getTime());
        next_entry.setStatus(PathEntry.DIRTY);
        next_entry.setSize(z.getSize());
        next_entry.setCompressedSize(z.getSize());
        if (isCsumRequested() && newtype == PathEntry.COMPRESSEDFILE) {
            next_entry.setCsum(instream);
        }
        if (next_entry.getSize() < 0) {
            next_entry.setSize(0);
        }
        if (next_entry.getCompressedSize() < 0) {
            next_entry.setCompressedSize(next_entry.getSize());
        }
        return next_entry;
    }

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