com.carmatech.maven.MergeFilesMojo.java Source code

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Here is the source code for com.carmatech.maven.MergeFilesMojo.java

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/*******************************************************************************
 * Copyright 2012-2014 Marc CARRE
 * 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.
 ******************************************************************************/
package com.carmatech.maven;

import java.io.IOException;

import org.apache.maven.plugin.AbstractMojo;
import org.apache.maven.plugin.MojoExecutionException;
import org.apache.maven.plugin.MojoFailureException;
import org.apache.maven.plugin.logging.Log;
import org.apache.maven.plugins.annotations.LifecyclePhase;
import org.apache.maven.plugins.annotations.Mojo;
import org.apache.maven.plugins.annotations.Parameter;
import org.apache.maven.project.MavenProject;

import com.carmatech.maven.model.IMerger;
import com.carmatech.maven.model.MergerFactory;

/**
 * Utilities to manipulate and process properties files.
 * 
 * @author Marc CARRE
 */
@Mojo(name = "merge", defaultPhase = LifecyclePhase.PROCESS_RESOURCES, threadSafe = true, requiresProject = true)
public class MergeFilesMojo extends AbstractMojo {

    @Parameter(defaultValue = "${project}", required = true, readonly = true)
    protected MavenProject project;

    @Parameter(required = true)
    protected MergeOperation[] operations;

    @Parameter(required = false)
    protected boolean parallel = true;

    protected Log logger;

    @Override
    public void execute() throws MojoExecutionException, MojoFailureException {
        logger = getLog();
        validateOperations();
        initializeOperations();

        try {
            mergeFiles();
        } catch (Exception e) {
            throw new MojoExecutionException(e.getMessage(), e);
        }
    }

    private void validateOperations() throws MojoExecutionException {
        if ((operations == null) || (operations.length == 0)) {
            throw new MojoExecutionException(
                    "An operation should be defined for maven-properties-files-plugin to work.");
        }
    }

    private void initializeOperations() {
        for (final MergeOperation operation : operations) {
            operation.setProject(project);
            operation.setLogger(logger);
        }
    }

    private void mergeFiles() throws IOException {
        final int numTotalSourceFiles = countTotalSourceFiles(operations);

        for (final MergeOperation operation : operations) {
            final IMerger merger = MergerFactory.getMerger(logger, numTotalSourceFiles, parallel);
            operation.merge(merger);
        }
    }

    private int countTotalSourceFiles(final MergeOperation[] operations) throws IOException {
        int count = 0;
        for (final MergeOperation operation : operations) {
            count += operation.getSourceFiles().size();
        }
        return count;
    }
}