/*
* Copyright 2015 Google Inc. All rights reserved.
*
* 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.google.errorprone.scanner;
import com.google.auto.value.AutoValue;
import com.google.common.collect.ImmutableClassToInstanceMap;
import com.google.errorprone.CodeTransformer;
import com.google.errorprone.DescriptionListener;
import com.google.errorprone.ErrorProneOptions;
import com.google.errorprone.VisitorState;
import com.sun.source.util.TreePath;
import com.sun.tools.javac.util.Context;
import java.lang.annotation.Annotation;
/**
* Adapter from an {@link ErrorProneScanner} to a {@link CodeTransformer}.
*/
@AutoValue
public abstract class ErrorProneScannerTransformer implements CodeTransformer {
public static ErrorProneScannerTransformer create(Scanner scanner) {
return new AutoValue_ErrorProneScannerTransformer(scanner);
}
abstract Scanner scanner();
@Override
public void apply(TreePath tree, Context context, DescriptionListener listener) {
scanner().scan(tree, createVisitorState(context, listener).withPath(tree));
}
@Override
public ImmutableClassToInstanceMap<Annotation> annotations() {
return ImmutableClassToInstanceMap.<Annotation>builder().build();
}
/**
* Create a VisitorState object from a compilation unit.
*/
private VisitorState createVisitorState(Context context, DescriptionListener listener) {
return new VisitorState(
context, listener, scanner().severityMap(), context.get(ErrorProneOptions.class));
}
}