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/*
* Copyright (c) 2013, 2016, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package crules;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Optional;
import javax.lang.model.element.TypeElement;
import javax.tools.JavaFileObject;
import com.sun.source.tree.Tree;
import com.sun.source.util.JavacTask;
import com.sun.source.util.Plugin;
import com.sun.source.util.TaskEvent;
import com.sun.source.util.TaskEvent.Kind;
import com.sun.source.util.TaskListener;
import com.sun.source.util.Trees;
import com.sun.tools.javac.api.BasicJavacTask;
import com.sun.tools.javac.tree.JCTree;
import com.sun.tools.javac.util.Context;
import com.sun.tools.javac.util.DefinedBy;
import com.sun.tools.javac.util.DefinedBy.Api;
import com.sun.tools.javac.util.Log;
/*
* This code must be run in a context that provides
* access to the following javac internal packages:
* com.sun.tools.javac.api
* com.sun.tools.javac.tree
* com.sun.tools.javac.util
*/
public class CodingRulesAnalyzerPlugin implements Plugin {
protected Log log;
protected Trees trees;
@DefinedBy(Api.COMPILER_TREE)
public void init(JavacTask task, String... args) {
BasicJavacTask impl = (BasicJavacTask)task;
Context context = impl.getContext();
log = Log.instance(context);
trees = Trees.instance(task);
task.addTaskListener(new PostAnalyzeTaskListener(
new MutableFieldsAnalyzer(task),
new AssertCheckAnalyzer(task),
new DefinedByAnalyzer(task)
));
}
private void addExports(String moduleName, String... packageNames) {
for (String packageName : packageNames) {
try {
ModuleLayer layer = ModuleLayer.boot();
Optional<Module> m = layer.findModule(moduleName);
if (!m.isPresent())
throw new Error("module not found: " + moduleName);
m.get().addExports(packageName, getClass().getModule());
} catch (Exception e) {
throw new Error("failed to add exports for " + moduleName + "/" + packageName);
}
}
}
public class PostAnalyzeTaskListener implements TaskListener {
private final Map<Kind, List<AbstractCodingRulesAnalyzer>> analyzers = new HashMap<>();
public PostAnalyzeTaskListener(AbstractCodingRulesAnalyzer... analyzers) {
for (AbstractCodingRulesAnalyzer analyzer : analyzers) {
List<AbstractCodingRulesAnalyzer> currentAnalyzers = this.analyzers.get(analyzer.eventKind);
if (currentAnalyzers == null) {
this.analyzers.put(analyzer.eventKind, currentAnalyzers = new ArrayList<>());
}
currentAnalyzers.add(analyzer);
}
}
@Override @DefinedBy(Api.COMPILER_TREE)
public void started(TaskEvent taskEvent) {}
@Override @DefinedBy(Api.COMPILER_TREE)
public void finished(TaskEvent taskEvent) {
List<AbstractCodingRulesAnalyzer> currentAnalyzers = this.analyzers.get(taskEvent.getKind());
if (currentAnalyzers != null) {
TypeElement typeElem = taskEvent.getTypeElement();
Tree tree = trees.getTree(typeElem);
if (tree != null) {
JavaFileObject prevSource = log.currentSourceFile();
try {
log.useSource(taskEvent.getCompilationUnit().getSourceFile());
for (AbstractCodingRulesAnalyzer analyzer : currentAnalyzers) {
analyzer.treeVisitor.scan((JCTree)tree);
}
} finally {
log.useSource(prevSource);
}
}
}
}
}
@Override @DefinedBy(Api.COMPILER_TREE)
public String getName() {
return "coding_rules";
}
}
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