com.epam.deltix.util.io.ZipBuilder Maven / Gradle / Ivy

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/*
 * Copyright 2021 EPAM Systems, Inc
 *
 * See the NOTICE file distributed with this work for additional information
 * regarding copyright ownership. 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.epam.deltix.util.io;

import com.epam.deltix.util.lang.Util;
import java.io.*;
import java.util.*;
import java.util.zip.*;

/**
 *
 */
public class ZipBuilder implements Closeable {
    private ZipOutputStream     mZipOut;
    private Set         mEntryNames = new HashSet  ();
    
    public ZipBuilder (File f) throws IOException {
        FileOutputStream        fos = new FileOutputStream (f);
        
        mZipOut = new ZipOutputStream (new BufferedOutputStream (fos));
    }
    
    public ZipBuilder (ZipOutputStream zos) {
        mZipOut = zos;
    }
    
    public ZipBuilder (OutputStream os) {
        mZipOut = new ZipOutputStream (os);
    }
    
    public boolean          containsEntry (String name) {
        return (mEntryNames.contains (name));
    }
    
    public void             close () throws IOException {
        mZipOut.close ();
    }
    
    private void            addEntryInternal (
        String                  name,
        long                    size,
        long                    time,
        InputStream             is
    )
        throws IOException, InterruptedException
    {
        ZipEntry                e = new ZipEntry (name);
        
        e.setSize (size);
        e.setTime (time);
        
        mZipOut.putNextEntry (e);
        StreamPump.pump (is, mZipOut); 
        mZipOut.flush ();
        mZipOut.closeEntry ();
    }
    
    private void            addEntryNoCheck (ZipFile f, ZipEntry from) 
        throws IOException, InterruptedException
    {
        InputStream     is = f.getInputStream (from);
        
        try {
            addEntryInternal (from.getName (), from.getSize (), from.getTime (), is);
        } finally {
            Util.close (is);
        }
    }
    
    public void             addEntry (ZipFile f, ZipEntry from) 
        throws IOException, InterruptedException
    {
        String          name = from.getName ();
        
        if (!mEntryNames.add (name))
            return;

        addEntryNoCheck (f, from);
    }
    
    public void             addEntry (ZipFile f, String name) 
        throws IOException, InterruptedException
    {
        if (!mEntryNames.add (name))
            return;

        addEntryNoCheck (f, f.getEntry (name));        
    }
    
    public void             addFile (File f, String name) 
        throws IOException, InterruptedException
    {
        if (!mEntryNames.add (name))
            return;
        
        FileInputStream     fis = new FileInputStream (f);

        try {
            addEntryInternal (name, f.length (), f.lastModified (), fis);
        } finally {
            Util.close (fis);
        }
    }
    
    public void             addDir (File dir, String name) 
        throws IOException, InterruptedException
    {
        File []         children = dir.listFiles ();
        
        for (File f : children) {
            String      childName = name + "/" + f.getName ();
            
            if (f.isDirectory ())
                addDir (f, childName);
            else
                addFile (f, childName);
        }
    }    
}