/*
* Copyright 2012 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.bugpatterns.testdata;
import static com.google.common.util.concurrent.Futures.immediateFuture;
import com.google.common.base.Function;
import com.google.common.util.concurrent.Futures;
import com.google.common.util.concurrent.ListenableFuture;
import java.util.concurrent.Future;
/** @author eaftan@google.com (Eddie Aftandilian) */
public class FutureReturnValueIgnoredPositiveCases {
IntValue intValue = new IntValue(0);
private Future<Integer> increment(int bar) {
return null;
}
public <T extends Future> T returnFutureType(T input) {
return input;
}
public void testFutureGenerics() {
// BUG: Diagnostic contains: Future must be checked
returnFutureType(Futures.immediateCancelledFuture());
}
public void foo() {
int i = 1;
// BUG: Diagnostic contains: Future must be checked
increment(i);
System.out.println(i);
}
public void bar() {
// BUG: Diagnostic contains: Future must be checked
this.intValue.increment();
}
public void testIntValue() {
IntValue value = new IntValue(10);
// BUG: Diagnostic contains: Future must be checked
value.increment();
}
public void testFunction() {
new Function<Object, ListenableFuture<?>>() {
@Override
public ListenableFuture<?> apply(Object input) {
return immediateFuture(null);
}
// BUG: Diagnostic contains: Future must be checked
}.apply(null);
}
private class IntValue {
final int i;
public IntValue(int i) {
this.i = i;
}
public ListenableFuture<IntValue> increment() {
return immediateFuture(new IntValue(i + 1));
}
public void increment2() {
// BUG: Diagnostic contains: Future must be checked
this.increment();
}
public void increment3() {
// BUG: Diagnostic contains: Future must be checked
increment();
}
}
}