/*******************************************************************************
* Copyright 2015 Analog Devices, Inc.
*
* 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 com.analog.lyric.dimple.model.variables;
import org.eclipse.jdt.annotation.Nullable;
import com.analog.lyric.dimple.model.domains.Domain;
import com.analog.lyric.dimple.model.domains.RealDomain;
import com.google.common.base.Predicate;
/**
* Canned predicates for testing variable attributes.
* <p>
* @since 0.08
* @author Christopher Barber
*/
public final class VariablePredicates
{
// Prevent instantiation
private VariablePredicates() {}
private static enum IsDiscrete implements Predicate<Variable>
{
INSTANCE;
@Override
public boolean apply(@Nullable Variable var)
{
return var instanceof Discrete;
}
}
/**
* Returns a predicate that is true for {@link Discrete} variables.
* @since 0.08
*/
static public Predicate<Variable> isDiscrete()
{
return IsDiscrete.INSTANCE;
}
private static enum IsUnboundedReal implements Predicate<Variable>
{
INSTANCE;
@Override
public boolean apply(@Nullable Variable var)
{
return var != null && var.getDomain().equals(RealDomain.unbounded());
}
}
/**
* Returns a predicate that is true for {@link Real} variables with unbounded domain.
* @since 0.08
*/
static public Predicate<Variable> isUnboundedReal()
{
return IsUnboundedReal.INSTANCE;
}
private static enum IsUnboundedRealJoint implements Predicate<Variable>
{
INSTANCE;
@Override
public boolean apply(@Nullable Variable var)
{
if (var != null)
{
Domain domain = var.getDomain();
return domain.isRealJoint() && !domain.isBounded();
}
return false;
}
}
/**
* Returns a predicate that is true for {@link RealJoint} variables with unbounded domain.
* @since 0.08
*/
static public Predicate<Variable> isUnboundedRealJoint()
{
return IsUnboundedRealJoint.INSTANCE;
}
}