com.github.TKnudsen.ComplexDataObject.view.VisualMappingFunction Maven / Gradle / Ivy

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package com.github.TKnudsen.ComplexDataObject.view;

import java.util.HashMap;
import java.util.Map;
import java.util.function.Function;

/**
 * 
 * Title: VisualMapping
 * 
 * 
 * 
 * Description: provides the basic functionality for mapping abstract data to
 * the visual space.
 * 
 * 
 * 
 * Copyright: Copyright (c) 2015-2017
 * 
 * 
 * @author Juergen Bernard
 * @TODO: define visual variable data structure
 */
public abstract class VisualMappingFunction implements Function {

	protected Map mappingLookup = new HashMap();

	protected abstract M calculateMapping(T t);

	@Override
	public M apply(T t) {
		if (mappingLookup.get(t) == null) {
			M mapping = calculateMapping(t);
			mappingLookup.put(t, mapping);
		}
		return mappingLookup.get(t);
	}
}