org.inferred.freebuilder.processor.util.testing.Diagnostics.java Source code

Introduction

Here is the source code for org.inferred.freebuilder.processor.util.testing.Diagnostics.java

Source

/*
 * 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 org.inferred.freebuilder.processor.util.testing;

import java.io.File;
import java.util.EnumSet;
import java.util.Locale;

import javax.tools.Diagnostic;
import javax.tools.Diagnostic.Kind;
import javax.tools.JavaFileObject;

import com.google.common.base.Predicate;
import com.google.common.base.Strings;

/**
 * Static utilities for {@link Diagnostic} instances.
 */
public class Diagnostics {

    /**
     * Appends a human-readable form of {@code diagnostic} to {@code appendable}.
     */
    public static void appendTo(StringBuilder appendable, Diagnostic<? extends JavaFileObject> diagnostic,
            int indentLevel) {
        String indent = "\n" + Strings.repeat(" ", indentLevel);
        appendable.append(diagnostic.getMessage(Locale.getDefault()).replace("\n", indent));
        JavaFileObject source = diagnostic.getSource();
        long line = diagnostic.getLineNumber();
        if (source != null && line != Diagnostic.NOPOS) {
            File sourceFile = new File(source.getName());
            appendable.append(" (").append(sourceFile.getName()).append(":").append(line).append(")");
        }
    }

    /**
     * Predicate that returns true if its argument is of kind {@code kind} or any of
     * {@code otherKinds}.
     */
    public static final Predicate<Diagnostic<?>> isKind(Kind kind, Kind... otherKinds) {
        final EnumSet<Kind> allKinds = EnumSet.of(kind, otherKinds);
        return new Predicate<Diagnostic<?>>() {
            @Override
            public boolean apply(Diagnostic<?> diagnostic) {
                return allKinds.contains(diagnostic.getKind());
            }
        };
    }

    private Diagnostics() {
    }
}