io.reactivex.rxjava3.internal.functions.ObjectHelper Maven / Gradle / Ivy
/*
* Copyright (c) 2016-present, RxJava Contributors.
*
* 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 io.reactivex.rxjava3.internal.functions;
import io.reactivex.rxjava3.functions.BiPredicate;
import java.util.Objects;
/**
* Utility methods containing the backport of Java 7's Objects utility class.
* Named as such to avoid clash with java.util.Objects.
*/
public final class ObjectHelper {
/** Utility class. */
private ObjectHelper() {
throw new IllegalStateException("No instances!");
}
static final BiPredicate EQUALS = new BiObjectPredicate();
/**
* Returns a BiPredicate that compares its parameters via Objects.equals().
* @param the value type
* @return the bi-predicate instance
*/
@SuppressWarnings("unchecked")
public static BiPredicate equalsPredicate() {
return (BiPredicate)EQUALS;
}
/**
* Validate that the given value is positive or report an IllegalArgumentException with
* the parameter name.
* @param value the value to validate
* @param paramName the parameter name of the value
* @return value
* @throws IllegalArgumentException if bufferSize <= 0
*/
public static int verifyPositive(int value, String paramName) {
if (value <= 0) {
throw new IllegalArgumentException(paramName + " > 0 required but it was " + value);
}
return value;
}
/**
* Validate that the given value is positive or report an IllegalArgumentException with
* the parameter name.
* @param value the value to validate
* @param paramName the parameter name of the value
* @return value
* @throws IllegalArgumentException if bufferSize <= 0
*/
public static long verifyPositive(long value, String paramName) {
if (value <= 0L) {
throw new IllegalArgumentException(paramName + " > 0 required but it was " + value);
}
return value;
}
static final class BiObjectPredicate implements BiPredicate {
@Override
public boolean test(Object o1, Object o2) {
return Objects.equals(o1, o2);
}
}
}