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/*
 * www.javagl.de - JglTF
 *
 * Copyright 2015-2017 Marco Hutter - http://www.javagl.de
 *
 * Permission is hereby granted, free of charge, to any person
 * obtaining a copy of this software and associated documentation
 * files (the "Software"), to deal in the Software without
 * restriction, including without limitation the rights to use,
 * copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following
 * conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 */
package de.javagl.jgltf.model.gl.impl;

import java.util.Collections;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.Objects;

import de.javagl.jgltf.model.gl.ProgramModel;
import de.javagl.jgltf.model.gl.TechniqueModel;
import de.javagl.jgltf.model.gl.TechniqueParametersModel;
import de.javagl.jgltf.model.gl.TechniqueStatesModel;
import de.javagl.jgltf.model.impl.AbstractNamedModelElement;

/**
 * Implementation of a {@link TechniqueModel}
 */
public class DefaultTechniqueModel extends AbstractNamedModelElement
    implements TechniqueModel 
{
    /**
     * The {@link ProgramModel}
     */
    private ProgramModel programModel;
    
    /**
     * The parameters
     */
    private final Map parameters;
    
    /**
     * The attributes
     */
    private final Map attributes;
    
    /**
     * The uniforms
     */
    private final Map uniforms;
    
    /**
     * The {@link TechniqueStatesModel}
     */
    private TechniqueStatesModel techniqueStatesModel;
    
    /**
     * Default constructor
     */
    public DefaultTechniqueModel()
    {
        this.parameters = new LinkedHashMap();
        this.attributes = new LinkedHashMap();
        this.uniforms = new LinkedHashMap();
    }
    
    /**
     * Set the {@link ProgramModel}
     * 
     * @param programModel The {@link ProgramModel}
     */
    public void setProgramModel(ProgramModel programModel)
    {
        this.programModel = programModel;
    }
    
    @Override
    public ProgramModel getProgramModel()
    {
        return programModel;
    }
    
    @Override
    public Map getParameters()
    {
        return Collections.unmodifiableMap(parameters);
    }
    
    /**
     * Add the given attribute to this technique
     * 
     * @param attributeName The attribute name
     * @param parameterName The parameter name
     */
    public void addAttribute(String attributeName, String parameterName)
    {
        Objects.requireNonNull(
            attributeName, "The attributeName may not be null");
        Objects.requireNonNull(
            parameterName, "The parameterName may not be null");
        attributes.put(attributeName, parameterName);
    }
    
    /**
     * Add the given parameter to this technique
     * 
     * @param parameterName The parameter name
     * @param techniqueParametersModel The {@link TechniqueParametersModel}
     */
    public void addParameter(
        String parameterName, TechniqueParametersModel techniqueParametersModel)
    {
        Objects.requireNonNull(
            parameterName, "The parameterName may not be null");
        Objects.requireNonNull(techniqueParametersModel, 
            "The techniqueParametersModel may not be null");
        parameters.put(parameterName, techniqueParametersModel);
    }

    @Override
    public Map getAttributes()
    {
        return Collections.unmodifiableMap(attributes);
    }
    
    @Override
    public TechniqueParametersModel getAttributeParameters(String attributeName)
    {
        String parameterName = attributes.get(attributeName);
        return parameters.get(parameterName);
    }
    
    /**
     * Add the given uniform to this technique
     * 
     * @param uniformName The uniform name
     * @param parameterName The parameter name
     */
    public void addUniform(String uniformName, String parameterName)
    {
        Objects.requireNonNull(
            uniformName, "The uniformName may not be null");
        Objects.requireNonNull(
            parameterName, "The parameterName may not be null");
        uniforms.put(uniformName, parameterName);
    }
    
    @Override
    public Map getUniforms()
    {
        return Collections.unmodifiableMap(uniforms);
    }

    @Override
    public TechniqueParametersModel getUniformParameters(String uniformName)
    {
        String parameterName = uniforms.get(uniformName);
        return parameters.get(parameterName);
    }
    
    /**
     * Set the {@link TechniqueStatesModel}
     * 
     * @param techniqueStatesModel The {@link TechniqueStatesModel}
     */
    public void setTechniqueStatesModel(
        TechniqueStatesModel techniqueStatesModel)
    {
        this.techniqueStatesModel = techniqueStatesModel;
    }

    @Override
    public TechniqueStatesModel getTechniqueStatesModel()
    {
        return techniqueStatesModel;
    }
}