com.google.errorprone.bugpatterns.apidiff.Java7ApiChecker.java Source code

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Here is the source code for com.google.errorprone.bugpatterns.apidiff.Java7ApiChecker.java

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/*
 * Copyright 2018 The Error Prone Authors.
 *
 * 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.bugpatterns.apidiff;

import static com.google.errorprone.BugPattern.Category.JDK;
import static com.google.errorprone.BugPattern.SeverityLevel.ERROR;

import com.google.common.io.Resources;
import com.google.errorprone.BugPattern;
import java.io.IOException;
import java.io.UncheckedIOException;

/** Checks for uses of classes, fields, or methods that are not compatible with JDK 7 */
@BugPattern(name = "Java7ApiChecker", summary = "Use of class, field, or method that is not compatible with JDK 7", explanation = "Code that needs to be compatible with Java 7 cannot use types or members"
        + " that are only present in the JDK 8 class libraries", category = JDK, severity = ERROR, suppressionAnnotations = {
                SuppressWarnings.class })
public class Java7ApiChecker extends ApiDiffChecker {

    static final ApiDiff API_DIFF = loadApiDiff();

    private static ApiDiff loadApiDiff() {
        try {
            ApiDiffProto.Diff.Builder diffBuilder = ApiDiffProto.Diff.newBuilder();
            byte[] diffData = Resources
                    .toByteArray(Resources.getResource(Java7ApiChecker.class, "7to8diff.binarypb"));
            diffBuilder.mergeFrom(diffData)
                    .addClassDiff(ApiDiffProto.ClassDiff.newBuilder()
                            .setMemberDiff(ApiDiffProto.MemberDiff.newBuilder()
                                    .setClassName("com/google/common/base/Predicate")
                                    .addMember(ApiDiffProto.ClassMember.newBuilder().setIdentifier("test")
                                            .setMemberDescriptor("(Ljava/lang/Object;)Z"))))
                    .addClassDiff(ApiDiffProto.ClassDiff.newBuilder()
                            .setMemberDiff(ApiDiffProto.MemberDiff.newBuilder()
                                    .setClassName("com/google/common/base/BinaryPredicate")
                                    .addMember(ApiDiffProto.ClassMember.newBuilder().setIdentifier("test")
                                            .setMemberDescriptor("(Ljava/lang/Object;Ljava/lang/Object;)Z"))));
            return ApiDiff.fromProto(diffBuilder.build());
        } catch (IOException e) {
            throw new UncheckedIOException(e);
        }
    }

    public Java7ApiChecker() {
        super(API_DIFF);
    }
}