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/********************************************************************************
* Copyright (c) 2015-2018 Contributors to the Eclipse Foundation
*
* See the NOTICE file(s) distributed with this work for additional
* information regarding copyright ownership.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v. 2.0 which is available at
* http://www.eclipse.org/legal/epl-2.0.
*
* SPDX-License-Identifier: EPL-2.0
*
********************************************************************************/
package org.eclipse.mdm.api.base.query;
import java.util.Objects;
import org.eclipse.mdm.api.base.adapter.Attribute;
import org.eclipse.mdm.api.base.model.Value;
/**
* Describes a filter condition.
*
* @since 1.0.0
* @author Viktor Stoehr, Gigatronik Ingolstadt GmbH
* @author Sebastian Dirsch, Gigatronik Ingolstadt GmbH
* @see Attribute
* @see ComparisonOperator
*/
public final class Condition {
// ======================================================================
// Instance variables
// ======================================================================
private final Attribute attribute;
private final Value value;
private final ComparisonOperator comparisonOperator;
// ======================================================================
// Constructors
// ======================================================================
/**
* Constructor.
*
* @param attribute
* The {@link Attribute} this condition will be applied to.
* @param comparisonOperator
* The condition {@link ComparisonOperator}.
* @param unit
* The unit of the created value.
* @param input
* The condition value.
*/
Condition(Attribute attribute, ComparisonOperator comparisonOperator, String unit, Object input) {
this.attribute = attribute;
this.comparisonOperator = comparisonOperator;
value = comparisonOperator.requiresSequence() ? attribute.createValueSeq(unit, input)
: attribute.createValue(unit, input);
}
// ======================================================================
// Public methods
// ======================================================================
/**
* Returns the target {@link Attribute}.
*
* @return The target {@code Attribute} is returned.
*/
public Attribute getAttribute() {
return attribute;
}
/**
* Returns the condition {@link Value}.
*
* @return The condition {@code Value} is returned.
*/
public Value getValue() {
return value;
}
/**
* Returns the condition {@link ComparisonOperator}.
*
* @return The condition {@code ComparisonOperator} is returned.
*/
public ComparisonOperator getComparisonOperator() {
return comparisonOperator;
}
/*
* (non-Javadoc)
* @see java.lang.Object#equals(java.lang.Object)
*/
@Override
public boolean equals(Object other) {
if (other == this) {
return true;
}
if (!(other instanceof Condition)) {
return false;
}
Condition condition = (Condition) other;
return Objects.equals(this.attribute, condition.attribute)
&& Objects.equals(this.value, condition.value)
&& Objects.equals(this.comparisonOperator, condition.comparisonOperator);
}
/*
* (non-Javadoc)
* @see java.lang.Object#hashCode()
*/
@Override
public int hashCode() {
return Objects.hash(attribute, value, comparisonOperator);
}
/*
* (non-Javadoc)
* @see java.lang.Object#toString()
*/
@Override
public String toString() {
return attribute.getEntityType().getName() + "." + attribute.getName() + " " + comparisonOperator + " " + value;
}
}
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