/**
* Copyright © 2010-2014 Nokia
*
* 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 org.jsonschema2pojo.integration.util;
import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import static java.util.Arrays.*;
import java.util.Collection;
import javax.tools.JavaCompiler;
import javax.tools.JavaFileObject;
import javax.tools.StandardJavaFileManager;
import javax.tools.ToolProvider;
import static org.apache.commons.io.FileUtils.*;
import static org.hamcrest.Matchers.*;
import static org.junit.Assert.*;
/**
* Compiles all the Java source files found in a given directory using the
* JSR-199 API in Java 6.
*/
public class Compiler {
public void compile(File directory, String classpath) {
JavaCompiler javaCompiler = ToolProvider.getSystemJavaCompiler();
StandardJavaFileManager fileManager = javaCompiler.getStandardFileManager(null, null, null);
Iterable<? extends JavaFileObject> compilationUnits = fileManager.getJavaFileObjectsFromFiles(findAllSourceFiles(directory));
ArrayList<String> options = new ArrayList<String>();
options.add("-classpath");
options.add(classpath);
options.add("-encoding");
options.add("UTF8");
if (compilationUnits.iterator().hasNext()) {
Boolean success = javaCompiler.getTask(null, fileManager, null, options, null, compilationUnits).call();
assertThat("Compilation was not successful, check stdout for errors", success, is(true));
}
}
private Collection<File> findAllSourceFiles(File directory) {
Collection<File> files = listFiles(directory, new String[] { "java" }, true);
for (File file : files) {
debugOutput(file);
}
return files;
}
@edu.umd.cs.findbugs.annotations.SuppressWarnings(value = "NP_ALWAYS_NULL",
justification = "Findbugs bug: false positive when using System.out, http://old.nabble.com/-FB-Discuss--Problems-with-false(-)positive-on-System.out.println-td30586499.html")
private void debugOutput(File file) {
if (System.getProperty("debug") != null) {
try {
System.out.println(readFileToString(file));
} catch (IOException e) {
throw new RuntimeException(e);
}
}
}
}