nl.toolforge.karma.core.scm.maven.MavenDependencyReader.java Source code

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Here is the source code for nl.toolforge.karma.core.scm.maven.MavenDependencyReader.java

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/*
Karma core - Core of the Karma application
Copyright (C) 2004  Toolforge <www.toolforge.nl>
    
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
    
This library 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
Lesser General Public License for more details.
    
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*/
package nl.toolforge.karma.core.scm.maven;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;

import java.util.ArrayList;
import java.util.List;

import org.apache.commons.digester.Digester;
import org.xml.sax.SAXException;
import nl.toolforge.karma.core.KarmaException;

/**
 * This class is a lightweight reader for Maven project.xml's. Using the Maven stuff itself sucks, as it
 * is very heavy stuff for the purpose of reading the project's dependencies only.
 *
 * @author D.A. Smedes
 */
public class MavenDependencyReader {

    // todo name the correct maven dependency
    //
    /**
     * Parses a Maven project.xml file and stores all <code>&lt;dependency&gt;</code>-elements in a <code>List</code>.
     *
     * @param dependencyFileIs
     * @return A <code>List</code>, containing <code>org.apache.maven.project.Dependency</code> instances.
     */
    public List parse(InputStream dependencyFileIs) throws KarmaException {

        Digester digester = new Digester();

        digester.addObjectCreate("project", ArrayList.class);
        digester.addObjectCreate("project/dependencies/dependency", "org.apache.maven.project.Dependency");

        digester.addCallMethod("project/dependencies/dependency/Id", "setId", 1);
        digester.addCallParam("project/dependencies/dependency/Id", 0);
        digester.addCallMethod("project/dependencies/dependency/groupId", "setGroupId", 1);
        digester.addCallParam("project/dependencies/dependency/groupId", 0);
        digester.addCallMethod("project/dependencies/dependency/artifactId", "setArtifactId", 1);
        digester.addCallParam("project/dependencies/dependency/artifactId", 0);
        digester.addCallMethod("project/dependencies/dependency/version", "setVersion", 1);
        digester.addCallParam("project/dependencies/dependency/version", 0);
        digester.addCallMethod("project/dependencies/dependency/jar", "setJar", 1);
        digester.addCallParam("project/dependencies/dependency/jar", 0);

        // Call List.add(Dependency)
        //
        digester.addSetNext("project/dependencies/dependency", "add", "org.apache.maven.project.Dependency");

        List deps = null;
        try {
            deps = (List) digester.parse(dependencyFileIs);
        } catch (IOException e) {
            e.printStackTrace();
            //      throw new KarmaException(KarmaException.LAZY_BASTARD);
        } catch (SAXException e) {
            e.printStackTrace();
            //      throw new KarmaException(KarmaException.LAZY_BASTARD);
        }

        return deps;
    }

    public List parse(File projectXmlFile) throws KarmaException {
        try {
            return parse(new FileInputStream(projectXmlFile));
        } catch (FileNotFoundException e) {
            throw new KarmaException(KarmaException.NO_MAVEN_PROJECT_XML);
        }
    }
}