| /* |
| * 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.tinkerpop.gremlin.process.traversal.dsl; |
| |
| import com.google.testing.compile.Compilation; |
| import com.google.testing.compile.JavaFileObjects; |
| import org.junit.Test; |
| |
| import javax.tools.JavaFileObject; |
| import javax.tools.StandardLocation; |
| import java.io.ByteArrayOutputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.function.Function; |
| import java.util.stream.Collectors; |
| |
| import static com.google.testing.compile.CompilationSubject.assertThat; |
| import static com.google.testing.compile.Compiler.javac; |
| |
| /** |
| * @author Stephen Mallette (http://stephen.genoprime.com) |
| */ |
| public class GremlinDslProcessorTest { |
| |
| @Test |
| public void shouldCompileToDefaultPackage() { |
| final Compilation compilation = javac() |
| .withProcessors(new GremlinDslProcessor()) |
| .compile(JavaFileObjects.forResource(GremlinDsl.class.getResource("SocialTraversalDsl.java"))); |
| assertThat(compilation).succeededWithoutWarnings(); |
| } |
| |
| @Test |
| public void shouldCompileAndMovePackage() { |
| final Compilation compilation = javac() |
| .withProcessors(new GremlinDslProcessor()) |
| .compile(JavaFileObjects.forResource(GremlinDsl.class.getResource("SocialMoveTraversalDsl.java"))); |
| assertThat(compilation).succeededWithoutWarnings(); |
| assertThat(compilation) |
| .generatedFile(StandardLocation.SOURCE_OUTPUT, "org.apache.tinkerpop.gremlin.process.traversal.dsl.social", "SocialMoveTraversal.java"); |
| } |
| |
| @Test |
| public void shouldCompileTraversalAndTraversalSourceToDefaultPackage() { |
| final Compilation compilation = javac() |
| .withProcessors(new GremlinDslProcessor()) |
| .compile(JavaFileObjects.forResource(GremlinDsl.class.getResource("SocialPackageTraversalDsl.java"))); |
| assertThat(compilation).succeededWithoutWarnings(); |
| } |
| |
| @Test |
| public void shouldCompileWithNoDefaultMethods() { |
| final Compilation compilation = javac() |
| .withProcessors(new GremlinDslProcessor()) |
| .compile(JavaFileObjects.forResource(GremlinDsl.class.getResource("SocialNoDefaultMethodsTraversalDsl.java"))); |
| assertThat(compilation).succeededWithoutWarnings(); |
| } |
| |
| @Test |
| public void shouldCompileRemoteDslTraversal() { |
| final Compilation compilation = javac() |
| .withProcessors(new GremlinDslProcessor()) |
| .compile(JavaFileObjects.forResource(GremlinDsl.class.getResource("SocialTraversalDsl.java")), |
| JavaFileObjects.forResource(GremlinDsl.class.getResource("RemoteDslTraversal.java"))); |
| |
| try { |
| final ClassLoader cl = new JavaFileObjectClassLoader(compilation.generatedFiles()); |
| final Class cls = cl.loadClass("org.apache.tinkerpop.gremlin.process.traversal.dsl.RemoteDslTraversal"); |
| cls.getConstructor().newInstance(); |
| } catch (Exception e) { |
| throw new RuntimeException(e); |
| } |
| } |
| |
| static class JavaFileObjectClassLoader extends ClassLoader { |
| Map<String, JavaFileObject> classFileMap; |
| |
| JavaFileObjectClassLoader(List<JavaFileObject> classFiles) { |
| classFileMap = classFiles.stream().collect(Collectors.toMap( |
| f -> f.toUri().toString() |
| .replaceFirst(".*(?=org/apache/tinkerpop)", ""), |
| Function.identity())); |
| } |
| |
| public Class findClass(String name) { |
| try { |
| byte[] b = loadClassData(name); |
| return defineClass(name, b, 0, b.length); |
| } catch (IOException ex) { |
| throw new RuntimeException(ex); |
| } |
| } |
| |
| private byte[] loadClassData(String name) throws IOException { |
| final ByteArrayOutputStream out = new ByteArrayOutputStream(); |
| final String classFilename = name.replaceAll("\\.", "/") + ".class"; |
| final InputStream in = classFileMap.get(classFilename).openInputStream(); |
| try { |
| final byte[] buf = new byte[1024]; |
| int len = in.read(buf); |
| while (len != -1) { |
| out.write(buf, 0, len); |
| len = in.read(buf); |
| } |
| } finally { |
| in.close(); |
| } |
| return out.toByteArray(); |
| } |
| } |
| } |