TopicTransform.java

/*
 * #%L
 * carewebframework
 * %%
 * Copyright (C) 2008 - 2016 Regenstrief Institute, Inc.
 * %%
 * 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.
 * 
 * This Source Code Form is also subject to the terms of the Health-Related
 * Additional Disclaimer of Warranty and Limitation of Liability available at
 *
 *      http://www.carewebframework.org/licensing/disclaimer.
 *
 * #L%
 */
package org.carewebframework.maven.plugin.help.chm;

import java.io.InputStream;
import java.io.OutputStream;

import org.carewebframework.maven.plugin.core.BaseMojo;

/**
 * Transforms #TOPICS file to XML format.
 */
public class TopicTransform extends BinaryTransform {
    
    public TopicTransform(BaseMojo mojo) {
        super(mojo, "topics");
    }
    
    @Override
    public void transform(InputStream inputStream, OutputStream outputStream) throws Exception {
        byte[] strings = loadBinaryFile("#STRINGS");
        byte[] urltbl = loadBinaryFile("#URLTBL");
        byte[] urlstr = loadBinaryFile("#URLSTR");
        byte[] data = new byte[16];
        
        while (inputStream.read(data) == 16) {
            String id = getString(strings, readDWord(data, 4));
            String label = id.replace("_no", "").replace("_", " ");
            int urltblOffset = readDWord(data, 8);
            int urlstrOffset = readDWord(urltbl, urltblOffset + 8);
            String url = getString(urlstr, urlstrOffset + 8);
            write(outputStream, "<topic", false, 1);
            writeAttribute(outputStream, "id", id);
            writeAttribute(outputStream, "label", label);
            writeAttribute(outputStream, "url", url);
            write(outputStream, " />", true, 0);
        }
    }
    
}