org.commonjava.maven.plugins.monolith.handler.PluginDescriptorHandler.java Source code

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Here is the source code for org.commonjava.maven.plugins.monolith.handler.PluginDescriptorHandler.java

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/*
 * Copyright (c) 2011 Red Hat, Inc.
 * 
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published
 * by the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see 
 * <http://www.gnu.org/licenses>.
 */

package org.commonjava.maven.plugins.monolith.handler;

import static org.apache.commons.io.IOUtils.closeQuietly;
import static org.commonjava.maven.plugins.monolith.util.DomUtils.getChild;
import static org.commonjava.maven.plugins.monolith.util.DomUtils.getChildren;
import static org.commonjava.maven.plugins.monolith.util.DomUtils.writeDocument;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.Collections;
import java.util.List;

import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.transform.TransformerException;

import org.codehaus.plexus.archiver.Archiver;
import org.codehaus.plexus.archiver.ArchiverException;
import org.codehaus.plexus.components.io.fileselectors.FileInfo;
import org.codehaus.plexus.logging.Logger;
import org.commonjava.maven.plugins.monolith.comp.MonolithVersioningContext;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.xml.sax.SAXException;

public class PluginDescriptorHandler extends AbstractMonolithDescriptorHandler {

    private static final String PLUGIN_XML_PATH = "META-INF/maven/plugin.xml";

    private Document doc;

    public PluginDescriptorHandler(final MonolithVersioningContext context, final Logger logger) {
        super(context, logger);
    }

    @Override
    protected boolean process(final FileInfo fileInfo) throws IOException {
        if (fileInfo.isFile()) {
            String entry = fileInfo.getName().replace('\\', '/');

            if (entry.startsWith("/")) {
                entry = entry.substring(1);
            }

            if (PLUGIN_XML_PATH.equals(entry)) {
                logger.info("Found plugin descriptor...");
                if (doc == null) {
                    logger.info("Parsing plugin descriptor.");

                    try {
                        doc = DocumentBuilderFactory.newInstance().newDocumentBuilder()
                                .parse(fileInfo.getContents());
                    } catch (final SAXException e) {
                        throw new ArchiverException("Failed to parse plugin.xml file: " + e.getMessage(), e);
                    } catch (final ParserConfigurationException e) {
                        throw new ArchiverException("Failed to parse plugin.xml file: " + e.getMessage(), e);
                    }

                    final String modifiedVersion = monolithVersioningContext.getCurrentMonolithVersion();
                    if (modifiedVersion != null) {
                        final Element version = getChild(doc.getDocumentElement(), "version");
                        if (version != null && !version.getTextContent().equals(modifiedVersion)) {
                            version.setTextContent(modifiedVersion);
                        }
                    }

                    final Element depRoot = getChild(doc.getDocumentElement(), "dependencies");
                    if (depRoot != null) {
                        final List<Element> deps = getChildren(depRoot, "dependency");
                        for (final Element dep : deps) {
                            if (!monolithVersioningContext.isMonolith(dep)) {
                                depRoot.removeChild(dep);
                            }
                        }
                    }
                } else {
                    logger.info("Skipping...plugin descriptor was already stored for inclusion.");
                }

                return true;
            }
        }

        return false;
    }

    @Override
    protected void generateOnCreation(final Archiver archiver) throws ArchiverException {
        if (doc != null) {
            File f = null;
            FileOutputStream stream = null;
            try {
                f = File.createTempFile("maven-assembly-plugin", "tmp");
                f.deleteOnExit();

                stream = new FileOutputStream(f);
                writeDocument(doc, stream);
            } catch (final TransformerException e) {
                throw new ArchiverException("Failed to write modified plugin.xml descriptor: " + e.getMessage(), e);
            } catch (final IOException e) {
                throw new ArchiverException("Failed to write modified plugin.xml descriptor: " + e.getMessage(), e);
            } finally {
                closeQuietly(stream);
            }

            logger.info("ADDING - Plugin descriptor: " + PLUGIN_XML_PATH + " from file: " + f.getAbsolutePath());
            archiver.addFile(f, PLUGIN_XML_PATH);
        } else if (logger.isDebugEnabled()) {
            logger.debug("SKIPPING - Plugin descriptor was not encountered. NOT ADDING.");
        }
    }

    @Override
    protected List<String> getGeneratedFileList() {
        logger.info("Parsed plugin.xml: " + doc);
        return doc == null ? null : Collections.singletonList(PLUGIN_XML_PATH);
    }

    @Override
    public void clearState() {
        logger.info("CLEARING parsed plugin.xml: " + doc);
        doc = null;
    }

}