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/*
* ============LICENSE_START=======================================================
* Copyright (C) 2016-2018 Ericsson. 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.
*
* SPDX-License-Identifier: Apache-2.0
* ============LICENSE_END=========================================================
*/
package org.onap.policy.apex.model.utilities.comparison;
/**
* This class is used to template key differences for bulk key comparisons in models. It performs a difference check between two keys.
*
* @author Liam Fallon (liam.fallon@ericsson.com)
* @param <K> the generic type
*/
public class KeyDifference<K> {
// The keys being compared
private K leftKey;
private K rightKey;
/**
* Constructor used to set the keys being compared.
*
* @param leftKey the left key that is being compared
* @param rightKey the right key that is being compared
*/
public KeyDifference(final K leftKey, final K rightKey) {
this.leftKey = leftKey;
this.rightKey = rightKey;
}
/**
* Gets the left key.
*
* @return the left key
*/
public K getLeftKey() {
return leftKey;
}
/**
* Gets the right key.
*
* @return the right key
*/
public K getRightKey() {
return rightKey;
}
/**
* Checks if the left and right keys are equal.
*
* @return true, if checks if is equal
*/
public boolean isEqual() {
return leftKey.equals(rightKey);
}
/**
* Gets a string representation of the difference between the keys.
*
* @param diffsOnly if set, then a blank string is returned if the keys are equal
* @return the difference between the keys as a string
*/
public String asString(final boolean diffsOnly) {
StringBuilder builder = new StringBuilder();
if (leftKey.equals(rightKey)) {
if (!diffsOnly) {
builder.append("left key ");
builder.append(leftKey);
builder.append(" equals right key ");
builder.append(rightKey);
builder.append('\n');
}
}
else {
builder.append("left key ");
builder.append(leftKey);
builder.append(" and right key ");
builder.append(rightKey);
builder.append(" differ\n");
}
return builder.toString();
}
}
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