/*******************************************************************************
* 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.solvers.sumproduct.sampledfactor;
import com.analog.lyric.dimple.model.variables.Discrete;
import com.analog.lyric.dimple.solvers.core.parameterizedMessages.DiscreteMessage;
import com.analog.lyric.dimple.solvers.gibbs.GibbsDiscrete;
import com.analog.lyric.dimple.solvers.sumproduct.SumProductDiscreteEdge;
import com.analog.lyric.util.misc.Internal;
/**
*
* @since 0.08
* @author Christopher Barber
* @category internal
*/
@Internal
class SumProductSampledDiscreteEdge extends SumProductDiscreteEdge
implements ISumProductSampledEdge<DiscreteMessage>
{
private final GibbsDiscrete _svar;
SumProductSampledDiscreteEdge(GibbsDiscrete svar)
{
super(svar.getModelObject());
_svar = svar;
setVariableInputUniform();
}
@Override
public void setFactorToVarDirection()
{
setVariableInputUniform();
}
@Override
public void setVarToFactorDirection()
{
Discrete var = _svar.getModelObject();
if (!var.hasFixedValue()) // Only set the input if there isn't already a fixed value
var.setPrior(varToFactorMsg);
}
@Override
public void setFactorToVarMsgFromSamples()
{
factorToVarMsg.setWeights(_svar.getBelief());
}
private void setVariableInputUniform()
{
Discrete var = _svar.getModelObject();
if (!var.hasFixedValue()) // Only set the input if there isn't already a fixed value
{
var.setPrior(null);
}
}
}