core-it-support/core-it-plugins/maven-it-plugin-context-passing/src/main/java/org/apache/maven/plugin/coreit/CatchMojo.java

/*
 * 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.
 */
package org.apache.maven.plugin.coreit;

import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.io.Writer;

import org.apache.maven.plugin.AbstractMojo;
import org.apache.maven.plugin.MojoExecutionException;
import org.apache.maven.plugins.annotations.Mojo;
import org.apache.maven.plugins.annotations.Parameter;

/**
 * "Catch" a parameter "thrown" by the ThrowMojo through the plugin context, and
 * write a file based on it's value to the build output directory.
 *
 */
@Mojo(name = "catch")
public class CatchMojo extends AbstractMojo {

    /**
     */
    @Parameter(defaultValue = "${project.build.directory}", readonly = true, required = true)
    private File outDir;

    public File getOutDir() {
        return outDir;
    }

    public void setOutDir(File outDir) {
        this.outDir = outDir;
    }

    public void execute() throws MojoExecutionException {
        String value = (String) getPluginContext().get(ThrowMojo.THROWN_PARAMETER);

        if (!outDir.exists()) {
            outDir.mkdirs();
        }

        File outfile = new File(outDir, value);

        Writer writer = null;
        try {
            writer = new FileWriter(outfile);

            writer.write(value);

            writer.flush();
        } catch (IOException e) {
            throw new MojoExecutionException("Cannot write output file: " + outfile, e);
        } finally {
            if (writer != null) {
                try {
                    writer.close();
                } catch (IOException e) {
                    // ignore
                }
            }
        }
    }
}