/*
* Copyright 2016 higherfrequencytrading.com
*
* 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 net.openhft.lang;
/**
* A generic Compare class for many types. It can be sub-classed so you can give types a different behaviour.
*/
public abstract class Compare {
private static final long NULL_HASHCODE = Long.MIN_VALUE;
public static boolean isEqual(boolean a, boolean b) {
return a == b;
}
private static long calcLongHashCode(boolean a) {
return a ? 1 : 0;
}
public static boolean isEqual(Boolean a, Boolean b) {
return a == null ? b == null : b != null && a.booleanValue() == b.booleanValue();
}
public static long calcLongHashCode(Boolean a) {
return a == null ? NULL_HASHCODE : calcLongHashCode(a.booleanValue());
}
public static boolean isEqual(byte a, byte b) {
return a == b;
}
private static long calcLongHashCode(byte a) {
return a;
}
public static boolean isEqual(Byte a, Byte b) {
return a == null ? b == null : b != null && a.byteValue() == b.byteValue();
}
public static long calcLongHashCode(Byte a) {
return a == null ? NULL_HASHCODE : calcLongHashCode(a.byteValue());
}
public static boolean isEqual(char a, char b) {
return a == b;
}
private static long calcLongHashCode(char a) {
return a;
}
public static boolean isEqual(Character a, Character b) {
return a == null ? b == null : b != null && a.charValue() == b.charValue();
}
public static long calcLongHashCode(Character a) {
return a == null ? NULL_HASHCODE : calcLongHashCode(a.charValue());
}
public static boolean isEqual(short a, short b) {
return a == b;
}
private static long calcLongHashCode(short a) {
return a;
}
public static boolean isEqual(Short a, Short b) {
return a == null ? b == null : b != null && a.shortValue() == b.shortValue();
}
public static long calcLongHashCode(Short a) {
return a == null ? NULL_HASHCODE : calcLongHashCode(a.shortValue());
}
public static boolean isEqual(int a, int b) {
return a == b;
}
private static long calcLongHashCode(int a) {
return a;
}
public static long calcLongHashCode(Integer a) {
return a == null ? NULL_HASHCODE : calcLongHashCode(a.intValue());
}
public static boolean isEqual(Integer a, Integer b) {
return a == null ? b == null : b != null && a.intValue() == b.intValue();
}
public static boolean isEqual(long a, long b) {
return a == b;
}
private static long calcLongHashCode(long a) {
return a;
}
public static boolean isEqual(Long a, Long b) {
return a == null ? b == null : b != null && a.longValue() == b.longValue();
}
public static long calcLongHashCode(Long a) {
return a == null ? NULL_HASHCODE : calcLongHashCode(a.longValue());
}
private static boolean isEqual(float a, float b) {
return Float.floatToRawIntBits(a) == Float.floatToRawIntBits(b);
}
private static long calcLongHashCode(float a) {
return Float.floatToRawIntBits(a);
}
public static boolean isEqual(Float a, Float b) {
return a == null ? b == null : b != null && isEqual(a.floatValue(), b.floatValue());
}
public static long calcLongHashCode(Float a) {
return a == null ? NULL_HASHCODE : calcLongHashCode(a.floatValue());
}
private static boolean isEqual(double a, double b) {
return Double.doubleToRawLongBits(a) == Double.doubleToRawLongBits(b);
}
private static long calcLongHashCode(double a) {
return Double.doubleToRawLongBits(a);
}
public static boolean isEqual(Double a, Double b) {
return a == null ? b == null : b != null && isEqual(a.doubleValue(), b.doubleValue());
}
public static long calcLongHashCode(Double a) {
return a == null ? NULL_HASHCODE : calcLongHashCode(a.doubleValue());
}
public static <T> boolean isEqual(T a, T b) {
return a == null ? b == null : b != null && a.equals(b);
}
private static long calcLongHashCode(LongHashable t) {
return t.longHashCode();
}
public static long calcLongHashCode(Object t) {
return t == null ? NULL_HASHCODE :
t instanceof LongHashable ? calcLongHashCode((LongHashable) t) :
t instanceof CharSequence ? calcLongHashCode((CharSequence) t) :
t.hashCode();
}
public static long calcLongHashCode(CharSequence s) {
if (s == null)
return NULL_HASHCODE;
long hash = 0;
for (int i = 0, len = s.length(); i < len; i++) {
hash = 57 * hash + s.charAt(i);
}
return hash;
}
}