[rules-users] Accessing properties of an object within a Nested Collection of a Nested Collection

[aa034373]

I am having a hard time trying to figure this out, maybe it is obvious and I
have overlooked it....  I am trying to evaluate properties of a object
contained within a nested collection of a nested collection on the LHS. 

Here is an example of the object model I am working with. 
*AutoManufacturer* is the parent class, with *Brand* residing in a
collection on the object, with *Model* residing in a collection on *Brand*,
and finally, *Part* residing in a collection of *Model*.  These classes were
created for illustration purposes for this question.....

My question more specifically would be, on the LHS, how would I write a rule
for instance that would find all *Part* objects with a Vendor of "PV999999".

Secondly, on the RHS, how could I iterate the resulting collection of Part
objects to print something like the partname for each of them.

Here are the class objects:

AutoManufacturer class
-----------------------------------------------------
package com.nabble.demo.model;

import java.util.ArrayList;
import java.util.List;

/**
 * Class that represents an automobile manufacturer
 */
public class AutoManufacturer
{
	private String		manufacturerName;
	private String		manufacturerId;
	private List<Brand>	brandsCollection;


	/**
	 *  Default constructor 
	 */
	public AutoManufacturer()
	{
		this.brandsCollection = new ArrayList<Brand>();
	}

	
	/**
	 * @return the manufacturerName
	 */
	public String getManufacturerName()
	{
		return this.manufacturerName;
	}

	/**
	 * @param manufacturerName the manufacturerName to set
	 */
	public void setManufacturerName( String manufacturerName )
	{
		this.manufacturerName = manufacturerName;
	}

	/**
	 * @return the manufacturerId
	 */
	public String getManufacturerId()
	{
		return this.manufacturerId;
	}

	/**
	 * @param manufacturerId the manufacturerId to set
	 */
	public void setManufacturerId( String manufacturerId )
	{
		this.manufacturerId = manufacturerId;
	}

	/**
	 * @return the brandsCollection
	 */
	public List<Brand> getBrandsCollection()
	{
		return this.brandsCollection;
	}

	/**
	 * @param brand the Brand to add to the collection
	 */
	public void addBrand( Brand brand )
	{
		this.brandsCollection.add(brand);
	}

}


Brand class
------------------------------------------------------
package com.nabble.demo.model;

import java.util.ArrayList;
import java.util.List;

public class Brand
{
	
	private String brandName;
	private String brandId;
	private List<Model> brandModels;
	
	public Brand()
	{
		this.brandModels = new ArrayList<Model>();
	}

	/**
	 * @return the brandName
	 */
	public String getBrandName()
	{
		return brandName;
	}

	/**
	 * @param brandName the brandName to set
	 */
	public void setBrandName( String brandName )
	{
		this.brandName = brandName;
	}

	/**
	 * @return the brandId
	 */
	public String getBrandId()
	{
		return brandId;
	}

	/**
	 * @param brandId the brandId to set
	 */
	public void setBrandId( String brandId )
	{
		this.brandId = brandId;
	}

	/**
	 * @return the brandModels
	 */
	public List<Model> getBrandModels()
	{
		return brandModels;
	}

	/**
	 * @param model the Model to add
	 */
	public void addModel( Model model )
	{
		this.brandModels.add(model);
	}

}


Model class
--------------------------------------------------------
package com.nabble.demo.model;

import java.util.ArrayList;
import java.util.List;

/**
 * Class that represents a particular model of an automaker's brand of car
 */
public class Model
{
	private String		modelName;
	private String		modelId;
	private List<Part>	partsList;

	public Model()
	{
		this.partsList = new ArrayList<Part>();
	}

	/**
	 * @return the modelName
	 */
	public String getModelName()
	{
		return this.modelName;
	}

	/**
	 * @param modelName the modelName to set
	 */
	public void setModelName( String modelName )
	{
		this.modelName = modelName;
	}

	/**
	 * @return the modelId
	 */
	public String getModelId()
	{
		return this.modelId;
	}

	/**
	 * @param modelId the modelId to set
	 */
	public void setModelId( String modelId )
	{
		this.modelId = modelId;
	}

	/**
	 * @return the partsList
	 */
	public List<Part> getPartsList()
	{
		return this.partsList;
	}

	/**
	 * Method to add new part to collection
	 * 
	 * @param part
	 */
	public void addPart( Part part )
	{
		this.partsList.add(part);
	}

}


Part Class
----------------------------------------------------------------

package com.nabble.demo.model;

/**
 *  Class that represents a part used on a Model of car 
 */
public class Part
{
	private String	partsId;	
	private String	partsName;
	private String  partVendor;

	/**
	 * Default constructor
	 */
	public Part()
	{

	}

	/**
	 * @return the partsId
	 */
	public String getPartsId()
	{
		return this.partsId;
	}

	/**
	 * @param partsId the partsId to set
	 */
	public void setPartsId( String partsId )
	{
		this.partsId = partsId;
	}	

	/**
	 * @return the partsName
	 */
	public String getPartsName()
	{
		return this.partsName;
	}

	/**
	 * @param partsName the partsName to set
	 */
	public void setPartsName( String partsName )
	{
		this.partsName = partsName;
	}

	/**
	 * @return the partVendor
	 */
	public String getPartVendor()
	{
		return partVendor;
	}

	/**
	 * @param partVendor the partVendor to set
	 */
	public void setPartVendor( String partVendor )
	{
		this.partVendor = partVendor;
	}

}


Finally...... here is my class to create an instance of the AutoManufacturer
object that would become the FACT for the rule to fire upon.

package com.nabble.demo;

import com.nabble.demo.model.AutoManufacturer;
import com.nabble.demo.model.Brand;
import com.nabble.demo.model.Model;
import com.nabble.demo.model.Part;

/**
 * Class to demonstrate using Autommaker model objects
 
 */
public class ProcessAutomaker
{

	/**
	 * @param args
	 */
	public static void main( String[] args )
	{

		//Create instance of AutoManufacturer
		AutoManufacturer automanf = new AutoManufacturer();
		automanf.setManufacturerId("123456");
		automanf.setManufacturerName("Large Auto Maker");

        //Create instance of Model		
		Model model = new Model();		
		model.setModelName("LargeSUV");
		model.setModelName("MN444555");
		
		//Create instances of Part, add to current Model instance
		Part part = new Part();
		part.setPartsId("PP123456");
		part.setPartsName("Steering Wheel");
		part.setPartVendor("PV999999");
		model.addPart(part);
		
		part = new Part();
		part.setPartsId("PP123499");
		part.setPartsName("Brake Pedal");
		part.setPartVendor("PV999999");
		model.addPart(part);
		
		part = new Part();
		part.setPartsId("PP123499");
		part.setPartsName("Floor Mat");
		part.setPartVendor("PV111111");
		model.addPart(part);
		
				
		//Create instance of Brand
		Brand brand = new Brand();
		brand.setBrandName("Brand1");
		brand.setBrandId("BB123456");
		brand.addModel(model);
		
		automanf.addBrand(brand);
		

	}

}


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