org.codehaus.mojo.gwt.shell.CSSMojo.java Source code

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Here is the source code for org.codehaus.mojo.gwt.shell.CSSMojo.java

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package org.codehaus.mojo.gwt.shell;

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.
 */

import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.util.List;

import org.apache.commons.io.FilenameUtils;
import org.apache.commons.lang.SystemUtils;
import org.apache.maven.artifact.Artifact;
import org.apache.maven.model.Resource;
import org.apache.maven.plugin.MojoExecutionException;
import org.apache.maven.plugin.MojoFailureException;
import org.codehaus.plexus.util.cli.StreamConsumer;

/**
 * Creates CSS interfaces for css files.
 * Will use the utility tool provided in gwt sdk which create a corresponding Java interface for accessing 
 * the classnames used in the file.
 * @goal css
 * @author Stale Undheim <undheim@corporater.com>
 * @author olamy
 * @since 2.1.0-1
 */
public class CSSMojo extends AbstractGwtShellMojo {
    /**
     * List of resourceBundles that should be used to generate CSS interfaces.
     * 
     * @parameter
     */
    private String[] cssFiles;

    /**
     * Shortcut for a single cssFile
     * 
     * @parameter
     */
    private String cssFile;

    public void doExecute() throws MojoExecutionException, MojoFailureException {
        setup();
        boolean generated = false;

        // java -cp gwt-dev.jar:gwt-user.jar
        // com.google.gwt.resources.css.InterfaceGenerator -standalone -typeName some.package.MyCssResource -css
        // input.css
        if (cssFiles != null) {
            for (String file : cssFiles) {
                final String typeName = FilenameUtils.separatorsToSystem(file).substring(0, file.lastIndexOf('.'))
                        .replace(File.separatorChar, '.');
                final File javaOutput = new File(getGenerateDirectory(),
                        typeName.replace('.', File.separatorChar) + ".java");
                final StringBuilder content = new StringBuilder();
                out = new StreamConsumer() {
                    public void consumeLine(String line) {
                        content.append(line).append(SystemUtils.LINE_SEPARATOR);
                    }
                };
                for (Resource resource : (List<Resource>) getProject().getResources()) {
                    final File candidate = new File(resource.getDirectory(), file);
                    if (candidate.exists()) {
                        getLog().info("Generating " + javaOutput + " with typeName " + typeName);
                        ensureTargetPackageExists(getGenerateDirectory(), typeName);

                        try {
                            new JavaCommand("com.google.gwt.resources.css.InterfaceGenerator")
                                    .withinScope(Artifact.SCOPE_COMPILE).arg("-standalone").arg("-typeName")
                                    .arg(typeName).arg("-css").arg(candidate.getAbsolutePath())
                                    .withinClasspath(getGwtDevJar()).withinClasspath(getGwtUserJar()).execute();
                            final FileWriter outputWriter = new FileWriter(javaOutput);
                            outputWriter.write(content.toString());
                            outputWriter.close();
                        } catch (IOException e) {
                            throw new MojoExecutionException("Failed to write to file: " + javaOutput);
                        }
                        generated = true;
                        break;
                    }
                }

                if (content.length() == 0) {
                    throw new MojoExecutionException("cannot generate java source from file " + file + ".");
                }
            }
        }

        if (generated) {
            getLog().debug("add compile source root " + getGenerateDirectory());
            addCompileSourceRoot(getGenerateDirectory());
        }

    }

    private void setup()

            throws MojoExecutionException {
        if (cssFiles == null && cssFile != null) {
            cssFiles = new String[] { cssFile };
        }

    }

    private void ensureTargetPackageExists(File generateDirectory, String targetName) {
        targetName = targetName.contains(".") ? targetName.substring(0, targetName.lastIndexOf('.')) : targetName;
        String targetPackage = targetName.replace('.', File.separatorChar);
        getLog().debug(
                "ensureTargetPackageExists, targetName : " + targetName + ", targetPackage : " + targetPackage);
        File targetPackageDirectory = new File(generateDirectory, targetPackage);
        if (!targetPackageDirectory.exists()) {
            targetPackageDirectory.mkdirs();
        }
    }

}