com.google.errorprone.refaster.testdata.template.PlaceholderTemplate.java Source code

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Here is the source code for com.google.errorprone.refaster.testdata.template.PlaceholderTemplate.java

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/*
 * Copyright 2014 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.refaster.testdata.template;

import com.google.common.base.Predicate;
import com.google.common.collect.Iterables;
import com.google.errorprone.refaster.annotation.AfterTemplate;
import com.google.errorprone.refaster.annotation.BeforeTemplate;
import com.google.errorprone.refaster.annotation.Placeholder;

import java.util.Collection;
import java.util.Iterator;

/**
 * Test case demonstrating use of Refaster placeholder methods.
 * 
 * @author lowasser@google.com (Louis Wasserman)
 */
public abstract class PlaceholderTemplate {
    @BeforeTemplate
    <E> void iteratorRemoveIf(Collection<E> collection) {
        Iterator<E> iterator = collection.iterator();
        while (iterator.hasNext()) {
            if (someBooleanCondition(iterator.next())) {
                iterator.remove();
            }
        }
    }

    @AfterTemplate
    <E> void iterablesRemoveIf(Collection<E> collection) {
        Iterables.removeIf(collection, new Predicate<E>() {
            @Override
            public boolean apply(E input) {
                return someBooleanCondition(input);
            }
        });
    }

    @Placeholder
    abstract <E> boolean someBooleanCondition(E e);
}