Java BufferedInputStream Create getInputstreamForZipEntry(ZipFile zipFile, String uri)

Description

get Inputstream For Zip Entry

License

Open Source License

Declaration

public static InputStream getInputstreamForZipEntry(ZipFile zipFile,
            String uri) throws IOException 

Method Source Code

//package com.java2s;
/*******************************************************************************
 * Copyright (c) 2001, 2010 IBM Corporation, Red Hat, and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors://from  www  .  j a  v a  2  s .c o  m
 * IBM Corporation - initial API and implementation
 *******************************************************************************/

import java.io.FileNotFoundException;

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

import java.util.zip.ZipEntry;

import java.util.zip.ZipFile;

public class Main {
    public static InputStream getInputstreamForZipEntry(ZipFile zipFile,
            String uri) throws IOException {
        try {
            ZipEntry entry = zipFile.getEntry(uri);
            if (entry == null) {
                // this is a hack, but zip files are sensitive to the difference
                // between '/' and '\\'
                // so the hack is to try all combinations to see if any exist
                char[] chars = uri.toCharArray();
                int[] slashIndices = new int[chars.length];
                int slashCount = 0;
                for (int i = 0; i < uri.length(); i++) {
                    if (chars[i] == '/' || chars[i] == '\\') {
                        slashIndices[slashCount] = i;
                        slashCount++;
                    }
                }
                int slashPow = (int) Math.pow(2, slashCount);
                boolean foundIt = false;
                for (int i = 0; i < slashPow && !foundIt; i++) {
                    for (int j = 0; j < slashCount; j++) {
                        if ((i >> j & 1) == 1) {
                            chars[slashIndices[j]] = '/';
                        } else {
                            chars[slashIndices[j]] = '\\';
                        }
                    }
                    entry = zipFile.getEntry(new String(chars));
                    if (entry != null) {
                        foundIt = true;
                    }
                }
                if (entry == null) {
                    Exception del = new FileNotFoundException(uri);
                    throw new IOException(del.toString());
                }
            }
            return new java.io.BufferedInputStream(
                    zipFile.getInputStream(entry));
        } catch (IllegalStateException zipClosed) {
            throw new IOException(zipClosed.toString());
        }
    }
}

Related

1. getInputStream(final String path)
2. getInputStream(InputStream in)
3. getInputStream(String path)
4. getInputStream(String resource)
5. getInputStream(String string)
6. getInputStreamFromEncodedStr(String encodedDetails)
7. getInputStreamFromString(String _string)
8. getInputStreamFromString(String _string)
9. getInputStreamFromString(String input)