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/*
* Copyright 2015 Open Networking Laboratory
*
* 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 org.onosproject.ovsdb.rfc.notation;
import static com.google.common.base.MoreObjects.toStringHelper;
import static com.google.common.base.Preconditions.checkNotNull;
import java.util.Objects;
import org.onosproject.ovsdb.rfc.notation.json.MutationSerializer;
import com.fasterxml.jackson.databind.annotation.JsonSerialize;
/**
* Mutation is s 3-element JSON array of the form [column, mutator, value] that
* represents a change to a column value.
*/
@JsonSerialize(using = MutationSerializer.class)
public final class Mutation {
/**
* Mutator must be "+=", "-=", "*=", "/=", or (integer only) "%=". The value
* of column is changed to the sum, difference, product, quotient, or
* remainder, respectively, of column and value.
*/
public enum Mutator {
SUM("+="), DIFFERENCE("-="), PRODUCT("*="), QUOTIENT("/="),
REMAINDER("%="), INSERT("insert"), DELETE("delete");
private final String mutator;
private Mutator(String mutator) {
this.mutator = mutator;
}
/**
* Returns the mutator for Mutator.
* @return the mutator
*/
public String mutator() {
return mutator;
}
}
private final String column;
private final Mutator mutator;
private final Object value;
/**
* Mutation constructor.
* @param column the column name
* @param mutator Mutator
* @param value column data
*/
public Mutation(String column, Mutator mutator, Object value) {
checkNotNull(column, "column cannot be null");
checkNotNull(mutator, "mutator cannot be null");
checkNotNull(value, "value cannot be null");
this.column = column;
this.mutator = mutator;
this.value = value;
}
/**
* Returns column name.
* @return column name
*/
public String getColumn() {
return column;
}
/**
* Returns Mutator.
* @return Mutator
*/
public Mutator getMutator() {
return mutator;
}
/**
* Returns column data.
* @return column data
*/
public Object getValue() {
return value;
}
@Override
public int hashCode() {
return Objects.hash(column, mutator, value);
}
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (obj instanceof Mutation) {
final Mutation other = (Mutation) obj;
return Objects.equals(this.column, other.column)
&& Objects.equals(this.mutator, other.mutator)
&& Objects.equals(this.value, other.value);
}
return false;
}
@Override
public String toString() {
return toStringHelper(this).add("column", column)
.add("mutator", mutator).add("value", value).toString();
}
}
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