org.eclipse.che.plugin.gwt.Utils.java Source code

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Here is the source code for org.eclipse.che.plugin.gwt.Utils.java

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/*
 * Copyright (c) 2012-2018 Red Hat, Inc.
 * 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:
 *   Red Hat, Inc. - initial API and implementation
 */
package org.eclipse.che.plugin.gwt;

import static java.lang.String.format;

import java.io.IOException;
import java.io.InputStream;
import java.util.Enumeration;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;
import org.apache.commons.compress.utils.IOUtils;

public class Utils {

    private Utils() {
    }

    /**
     * Reads content of the file from ZIP archive.
     *
     * @param zipFile ZIP file
     * @param path path of the file to read content
     * @return content of the file with the given path
     * @throws IOException if error occurs while reading
     * @throws IllegalArgumentException if file not found in ZIP archive
     */
    public static String getFileContent(ZipFile zipFile, String path) throws IOException {
        Enumeration<? extends ZipEntry> entries = zipFile.entries();

        while (entries.hasMoreElements()) {
            ZipEntry entry = entries.nextElement();

            if (path.equals(entry.getName())) {
                try (InputStream in = zipFile.getInputStream(entry)) {
                    byte[] bytes = IOUtils.toByteArray(in);

                    return new String(bytes);
                }
            }
        }

        throw new IllegalArgumentException(format("Cannot find file '%s' in '%s'", path, zipFile.getName()));
    }
}