/*
* 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.bugpatterns.testdata;
import java.util.Comparator;
/**
* @author irogers@google.com (Ian Rogers)
*/
public class BadComparableNegativeCases {
// The corrected cases of the PositiveCases test.
static class ComparableTest implements Comparable<ComparableTest> {
private final long value = 0;
public int compareTo(ComparableTest other) {
return Long.compare(value, other.value);
}
}
static class BoxedComparableTest implements Comparable<BoxedComparableTest> {
private final Long value = Long.valueOf(0);
public int compareTo(BoxedComparableTest other) {
return value.compareTo(other.value);
}
}
static final Comparator<Number> COMPARATOR_UNBOXED_INT_CAST =
new Comparator<Number>() {
public int compare(Number n1, Number n2) {
return Long.compare(n1.longValue(), n2.longValue());
}
};
static final Comparator<Long> COMPARATOR_BOXED_INT_CAST =
new Comparator<Long>() {
public int compare(Long n1, Long n2) {
return n1.compareTo(n2);
}
};
// Don't match non-Comparable or Comparator cases.
static class NonComparableTest {
private final long value = 0;
public int compareTo(ComparableTest other) {
return (int) (value - other.value);
}
}
static final Object COMPARATOR_LIKE_INT_CAST =
new Object() {
public int compare(Long n1, Long n2) {
return (int) (n1 - n2);
}
};
// Narrowing conversions that don't follow the long -> int pattern.
static final Comparator<Number> COMPARATOR_UNBOXED_NON_PATTERN_LONG_CAST =
new Comparator<Number>() {
// To match the Comparator API.
@Override
public int compare(Number n1, Number n2) {
return (int) (n1.intValue() - n2.intValue());
}
public short compare(int n1, int n2) {
return (short) (n1 - n2);
}
public byte compare(long n1, long n2) {
return (byte) (n1 - n2);
}
};
// Not narrowing conversions.
static final Comparator<Number> COMPARATOR_UNBOXED_NON_NARROW_LONG_CAST =
new Comparator<Number>() {
// To match the Comparator API.
@Override
public int compare(Number n1, Number n2) {
return (int) (n1.intValue() - n2.intValue());
}
public long compare(long n1, long n2) {
return (long) (n1 - n2);
}
};
static final Comparator<Number> COMPARATOR_UNBOXED_NON_NARROW_INT_CAST =
new Comparator<Number>() {
public int compare(Number n1, Number n2) {
return (int) (n1.intValue() - n2.intValue());
}
};
static final Comparator<Number> COMPARATOR_UNBOXED_NON_NARROW_SHORT_CAST =
new Comparator<Number>() {
// To match the Comparator API.
@Override
public int compare(Number n1, Number n2) {
return (int) (n1.intValue() - n2.intValue());
}
public short compare(short n1, short n2) {
return (short) (n1 - n2);
}
};
static final Comparator<Number> COMPARATOR_UNBOXED_NON_NARROW_BYTE_CAST =
new Comparator<Number>() {
// To match the Comparator API.
@Override
public int compare(Number n1, Number n2) {
return (int) (n1.intValue() - n2.intValue());
}
public byte compare(byte n1, byte n2) {
return (byte) (n1 - n2);
}
};
// Not signed conversions.
static final Comparator<Number> COMPARATOR_UNBOXED_NON_NARROW_CHAR_CAST =
new Comparator<Number>() {
@Override
public int compare(Number n1, Number n2) {
return (char) (n1.shortValue() - n2.shortValue());
}
public char compare(char n1, char n2) {
return (char) (n1 - n2);
}
public char compare(byte n1, byte n2) {
return (char) (n1 - n2);
}
};
}