org.apache.sshd.common.util.functors.Int2IntFunction Maven / Gradle / Ivy
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* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.apache.sshd.common.util.functors;
import java.util.function.IntUnaryOperator;
import org.apache.sshd.common.util.ValidateUtils;
/**
* @author Apache MINA SSHD Project
*/
public final class Int2IntFunction {
private Int2IntFunction() {
throw new UnsupportedOperationException("No instance");
}
public static IntUnaryOperator sub(int delta) {
return add(0 - delta);
}
public static IntUnaryOperator add(int delta) {
if (delta == 0) {
return IntUnaryOperator.identity();
} else {
return value -> value + delta;
}
}
public static IntUnaryOperator mul(int factor) {
if (factor == 0) {
return constant(0);
} else if (factor == 1) {
return IntUnaryOperator.identity();
} else {
return value -> value * factor;
}
}
public static IntUnaryOperator constant(int v) {
return value -> v;
}
public static IntUnaryOperator div(int factor) {
if (factor == 1) {
return IntUnaryOperator.identity();
} else {
ValidateUtils.checkTrue(factor != 0, "Zero division factor");
return value -> value / factor;
}
}
}