/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * See LICENSE.txt included in this distribution for the specific
 * language governing permissions and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at LICENSE.txt.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */

/*
 * Copyright (c) 2005, 2012, Oracle and/or its affiliates. All rights reserved.
 */
package org.opensolaris.opengrok.analysis.archive;

import java.io.IOException;
import java.io.InputStream;
import java.io.Reader;
import java.io.Writer;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;
import org.apache.lucene.document.Document;
import org.apache.lucene.document.Field;
import org.apache.lucene.document.TextField;
import org.opensolaris.opengrok.analysis.AnalyzerGuru;
import org.opensolaris.opengrok.analysis.FileAnalyzer;
import org.opensolaris.opengrok.analysis.FileAnalyzerFactory;
import org.opensolaris.opengrok.analysis.plain.PlainFullTokenizer;
import org.opensolaris.opengrok.web.Util;

/**
 * Analyzes Zip files Created on September 22, 2005
 *
 * @author Chandan
 */
public class ZipAnalyzer extends FileAnalyzer {

    private final StringBuilder content;
    private PlainFullTokenizer plainfull;
    TokenStreamComponents tc;

    protected ZipAnalyzer(FileAnalyzerFactory factory) {
        super(factory);
        content = new StringBuilder(64 * 1024);
    }

    @Override
    public void analyze(Document doc, InputStream in) throws IOException {
        content.setLength(0);
        ZipInputStream zis = new ZipInputStream(in);
        ZipEntry entry;
        while ((entry = zis.getNextEntry()) != null) {
            content.append(entry.getName()).append('\n');
        }
        content.trimToSize();
        doc.add(new Field("full", AnalyzerGuru.dummyS, TextField.TYPE_STORED));
    }

    @Override
    public TokenStreamComponents createComponents(String fieldName, Reader reader) {
        if ("full".equals(fieldName)) {
            plainfull = new PlainFullTokenizer(reader);
            plainfull.reInit(content.toString());
            tc = new TokenStreamComponents(plainfull) {
                @Override
                protected void setReader(final Reader reader) throws IOException {
                    plainfull.reInit(content.toString());
                    super.setReader(reader);
                }
            };
            return tc;
        }
        return super.createComponents(fieldName, reader);
    }

    /**
     * Write a cross referenced HTML file.
     *
     * @param out Writer to store HTML cross-reference
     */
    @Override
    public void writeXref(Writer out) throws IOException {
        out.write(Util.htmlize(content));
    }
}