studio.raptor.ddal.common.builder.EqualsBuilder Maven / Gradle / Ivy
/*
* 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 studio.raptor.ddal.common.builder;
public class EqualsBuilder implements Builder {
/**
* If the fields tested are equals.
* The default value is true.
*/
private boolean isEquals = true;
/**
* Constructor for EqualsBuilder.
*
* Starts off assuming that equals is true.
* @see Object#equals(Object)
*/
public EqualsBuilder() {
// do nothing for now.
}
/**
* Adds the result of super.equals() to this builder.
*
* @param superEquals the result of calling super.equals()
* @return EqualsBuilder - used to chain calls.
* @since 2.0
*/
public EqualsBuilder appendSuper(final boolean superEquals) {
if (!isEquals) {
return this;
}
isEquals = superEquals;
return this;
}
/**
* Test if two Objects are equal using their
* equals method.
*
* @param lhs the left hand object
* @param rhs the right hand object
* @return EqualsBuilder - used to chain calls.
*/
public EqualsBuilder append(final Object lhs, final Object rhs) {
if (!isEquals) {
return this;
}
if (lhs == rhs) {
return this;
}
if (lhs == null || rhs == null) {
this.setEquals(false);
return this;
}
final Class lhsClass = lhs.getClass();
if (!lhsClass.isArray()) {
// The simple case, not an array, just test the element
isEquals = lhs.equals(rhs);
} else {
// factor out array case in order to keep method small enough
// to be inlined
appendArray(lhs, rhs);
}
return this;
}
/**
* Test if an Object is equal to an array.
*
* @param lhs the left hand object, an array
* @param rhs the right hand object
*/
private void appendArray(final Object lhs, final Object rhs) {
if (lhs.getClass() != rhs.getClass()) {
// Here when we compare different dimensions, for example: a boolean[][] to a boolean[]
this.setEquals(false);
}
// 'Switch' on type of array, to dispatch to the correct handler
// This handles multi dimensional arrays of the same depth
else if (lhs instanceof long[]) {
append((long[]) lhs, (long[]) rhs);
} else if (lhs instanceof int[]) {
append((int[]) lhs, (int[]) rhs);
} else if (lhs instanceof short[]) {
append((short[]) lhs, (short[]) rhs);
} else if (lhs instanceof char[]) {
append((char[]) lhs, (char[]) rhs);
} else if (lhs instanceof byte[]) {
append((byte[]) lhs, (byte[]) rhs);
} else if (lhs instanceof double[]) {
append((double[]) lhs, (double[]) rhs);
} else if (lhs instanceof float[]) {
append((float[]) lhs, (float[]) rhs);
} else if (lhs instanceof boolean[]) {
append((boolean[]) lhs, (boolean[]) rhs);
} else {
// Not an array of primitives
append((Object[]) lhs, (Object[]) rhs);
}
}
/**
*
* Test if two long s are equal.
*
*
* @param lhs
* the left hand long
* @param rhs
* the right hand long
* @return EqualsBuilder - used to chain calls.
*/
public EqualsBuilder append(final long lhs, final long rhs) {
if (!isEquals) {
return this;
}
isEquals = lhs == rhs;
return this;
}
/**
* Test if two ints are equal.
*
* @param lhs the left hand int
* @param rhs the right hand int
* @return EqualsBuilder - used to chain calls.
*/
public EqualsBuilder append(final int lhs, final int rhs) {
if (!isEquals) {
return this;
}
isEquals = lhs == rhs;
return this;
}
/**
* Test if two shorts are equal.
*
* @param lhs the left hand short
* @param rhs the right hand short
* @return EqualsBuilder - used to chain calls.
*/
public EqualsBuilder append(final short lhs, final short rhs) {
if (!isEquals) {
return this;
}
isEquals = lhs == rhs;
return this;
}
/**
* Test if two chars are equal.
*
* @param lhs the left hand char
* @param rhs the right hand char
* @return EqualsBuilder - used to chain calls.
*/
public EqualsBuilder append(final char lhs, final char rhs) {
if (!isEquals) {
return this;
}
isEquals = lhs == rhs;
return this;
}
/**
* Test if two bytes are equal.
*
* @param lhs the left hand byte
* @param rhs the right hand byte
* @return EqualsBuilder - used to chain calls.
*/
public EqualsBuilder append(final byte lhs, final byte rhs) {
if (!isEquals) {
return this;
}
isEquals = lhs == rhs;
return this;
}
/**
* Test if two doubles are equal by testing that the
* pattern of bits returned by doubleToLong are equal.
*
* This handles NaNs, Infinities, and -0.0.
*
* It is compatible with the hash code generated by
* HashCodeBuilder.
*
* @param lhs the left hand double
* @param rhs the right hand double
* @return EqualsBuilder - used to chain calls.
*/
public EqualsBuilder append(final double lhs, final double rhs) {
if (!isEquals) {
return this;
}
return append(Double.doubleToLongBits(lhs), Double.doubleToLongBits(rhs));
}
/**
* Test if two floats are equal byt testing that the
* pattern of bits returned by doubleToLong are equal.
*
* This handles NaNs, Infinities, and -0.0.
*
* It is compatible with the hash code generated by
* HashCodeBuilder.
*
* @param lhs the left hand float
* @param rhs the right hand float
* @return EqualsBuilder - used to chain calls.
*/
public EqualsBuilder append(final float lhs, final float rhs) {
if (!isEquals) {
return this;
}
return append(Float.floatToIntBits(lhs), Float.floatToIntBits(rhs));
}
/**
* Test if two booleanss are equal.
*
* @param lhs the left hand boolean
* @param rhs the right hand boolean
* @return EqualsBuilder - used to chain calls.
*/
public EqualsBuilder append(final boolean lhs, final boolean rhs) {
if (!isEquals) {
return this;
}
isEquals = lhs == rhs;
return this;
}
/**
* Performs a deep comparison of two Object arrays.
*
* This also will be called for the top level of
* multi-dimensional, ragged, and multi-typed arrays.
*
* @param lhs the left hand Object[]
* @param rhs the right hand Object[]
* @return EqualsBuilder - used to chain calls.
*/
public EqualsBuilder append(final Object[] lhs, final Object[] rhs) {
if (!isEquals) {
return this;
}
if (lhs == rhs) {
return this;
}
if (lhs == null || rhs == null) {
this.setEquals(false);
return this;
}
if (lhs.length != rhs.length) {
this.setEquals(false);
return this;
}
for (int i = 0; i < lhs.length && isEquals; ++i) {
append(lhs[i], rhs[i]);
}
return this;
}
/**
* Deep comparison of array of long. Length and all
* values are compared.
*
* The method {@link #append(long, long)} is used.
*
* @param lhs the left hand long[]
* @param rhs the right hand long[]
* @return EqualsBuilder - used to chain calls.
*/
public EqualsBuilder append(final long[] lhs, final long[] rhs) {
if (!isEquals) {
return this;
}
if (lhs == rhs) {
return this;
}
if (lhs == null || rhs == null) {
this.setEquals(false);
return this;
}
if (lhs.length != rhs.length) {
this.setEquals(false);
return this;
}
for (int i = 0; i < lhs.length && isEquals; ++i) {
append(lhs[i], rhs[i]);
}
return this;
}
/**
* Deep comparison of array of int. Length and all
* values are compared.
*
* The method {@link #append(int, int)} is used.
*
* @param lhs the left hand int[]
* @param rhs the right hand int[]
* @return EqualsBuilder - used to chain calls.
*/
public EqualsBuilder append(final int[] lhs, final int[] rhs) {
if (!isEquals) {
return this;
}
if (lhs == rhs) {
return this;
}
if (lhs == null || rhs == null) {
this.setEquals(false);
return this;
}
if (lhs.length != rhs.length) {
this.setEquals(false);
return this;
}
for (int i = 0; i < lhs.length && isEquals; ++i) {
append(lhs[i], rhs[i]);
}
return this;
}
/**
* Deep comparison of array of short. Length and all
* values are compared.
*
* The method {@link #append(short, short)} is used.
*
* @param lhs the left hand short[]
* @param rhs the right hand short[]
* @return EqualsBuilder - used to chain calls.
*/
public EqualsBuilder append(final short[] lhs, final short[] rhs) {
if (!isEquals) {
return this;
}
if (lhs == rhs) {
return this;
}
if (lhs == null || rhs == null) {
this.setEquals(false);
return this;
}
if (lhs.length != rhs.length) {
this.setEquals(false);
return this;
}
for (int i = 0; i < lhs.length && isEquals; ++i) {
append(lhs[i], rhs[i]);
}
return this;
}
/**
* Deep comparison of array of char. Length and all
* values are compared.
*
* The method {@link #append(char, char)} is used.
*
* @param lhs the left hand char[]
* @param rhs the right hand char[]
* @return EqualsBuilder - used to chain calls.
*/
public EqualsBuilder append(final char[] lhs, final char[] rhs) {
if (!isEquals) {
return this;
}
if (lhs == rhs) {
return this;
}
if (lhs == null || rhs == null) {
this.setEquals(false);
return this;
}
if (lhs.length != rhs.length) {
this.setEquals(false);
return this;
}
for (int i = 0; i < lhs.length && isEquals; ++i) {
append(lhs[i], rhs[i]);
}
return this;
}
/**
* Deep comparison of array of byte. Length and all
* values are compared.
*
* The method {@link #append(byte, byte)} is used.
*
* @param lhs the left hand byte[]
* @param rhs the right hand byte[]
* @return EqualsBuilder - used to chain calls.
*/
public EqualsBuilder append(final byte[] lhs, final byte[] rhs) {
if (!isEquals) {
return this;
}
if (lhs == rhs) {
return this;
}
if (lhs == null || rhs == null) {
this.setEquals(false);
return this;
}
if (lhs.length != rhs.length) {
this.setEquals(false);
return this;
}
for (int i = 0; i < lhs.length && isEquals; ++i) {
append(lhs[i], rhs[i]);
}
return this;
}
/**
* Deep comparison of array of double. Length and all
* values are compared.
*
* The method {@link #append(double, double)} is used.
*
* @param lhs the left hand double[]
* @param rhs the right hand double[]
* @return EqualsBuilder - used to chain calls.
*/
public EqualsBuilder append(final double[] lhs, final double[] rhs) {
if (!isEquals) {
return this;
}
if (lhs == rhs) {
return this;
}
if (lhs == null || rhs == null) {
this.setEquals(false);
return this;
}
if (lhs.length != rhs.length) {
this.setEquals(false);
return this;
}
for (int i = 0; i < lhs.length && isEquals; ++i) {
append(lhs[i], rhs[i]);
}
return this;
}
/**
* Deep comparison of array of float. Length and all
* values are compared.
*
* The method {@link #append(float, float)} is used.
*
* @param lhs the left hand float[]
* @param rhs the right hand float[]
* @return EqualsBuilder - used to chain calls.
*/
public EqualsBuilder append(final float[] lhs, final float[] rhs) {
if (!isEquals) {
return this;
}
if (lhs == rhs) {
return this;
}
if (lhs == null || rhs == null) {
this.setEquals(false);
return this;
}
if (lhs.length != rhs.length) {
this.setEquals(false);
return this;
}
for (int i = 0; i < lhs.length && isEquals; ++i) {
append(lhs[i], rhs[i]);
}
return this;
}
/**
* Deep comparison of array of boolean. Length and all
* values are compared.
*
* The method {@link #append(boolean, boolean)} is used.
*
* @param lhs the left hand boolean[]
* @param rhs the right hand boolean[]
* @return EqualsBuilder - used to chain calls.
*/
public EqualsBuilder append(final boolean[] lhs, final boolean[] rhs) {
if (!isEquals) {
return this;
}
if (lhs == rhs) {
return this;
}
if (lhs == null || rhs == null) {
this.setEquals(false);
return this;
}
if (lhs.length != rhs.length) {
this.setEquals(false);
return this;
}
for (int i = 0; i < lhs.length && isEquals; ++i) {
append(lhs[i], rhs[i]);
}
return this;
}
/**
* Returns true if the fields that have been checked
* are all equal.
*
* @return boolean
*/
public boolean isEquals() {
return this.isEquals;
}
/**
* Returns true if the fields that have been checked
* are all equal.
*
* @return true if all of the fields that have been checked
* are equal, false otherwise.
*
* @since 3.0
*/
@Override
public Boolean build() {
return Boolean.valueOf(isEquals());
}
/**
* Sets the isEquals value.
*
* @param isEquals The value to set.
* @since 2.1
*/
protected void setEquals(final boolean isEquals) {
this.isEquals = isEquals;
}
/**
* Reset the EqualsBuilder so you can use the same object again
* @since 2.5
*/
public void reset() {
this.isEquals = true;
}
}