tinytablescoringengine.TinyTableCustomOpFactory.java Source code

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Here is the source code for tinytablescoringengine.TinyTableCustomOpFactory.java

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/*******************************************************************************
 * Educational Online Test Delivery System 
 * Copyright (c) 2014 American Institutes for Research
 *     
 * Distributed under the AIR Open Source License, Version 1.0 
 * See accompanying file AIR-License-1_0.txt or at
 * 
 * http://www.smarterapp.org/documents/American_Institutes_for_Research_Open_Source_Software_License.pdf
 ******************************************************************************/
package tinytablescoringengine;

import java.util.HashMap;
import java.util.Map;

import org.apache.commons.lang3.StringUtils;
import org.jdom2.Element;

import qtiscoringengine.Expression;
import qtiscoringengine.ICustomOperatorFactory;

public class TinyTableCustomOpFactory implements ICustomOperatorFactory {
    interface ITTConstructor {
        TinyTableExpression getTTConstructor(Element node);
    }

    public Map<String, ITTConstructor> _ttConstructors = new HashMap<String, ITTConstructor>();

    public TinyTableCustomOpFactory() {
        addConstructor("GETCOLUMN", new TTConGetColumn());
        addConstructor("GETHEADERROW", new TTConGetHeaderRow());
        addConstructor("GETVALUENUMERIC", new TTConGetValueNumeric());
    }

    class TTConGetColumn implements ITTConstructor {
        public TinyTableExpression getTTConstructor(Element node) {
            return new TTGetColumn(node);
        }
    }

    class TTConGetValueNumeric implements ITTConstructor {
        public TinyTableExpression getTTConstructor(Element node) {
            return new TTGetValueNumeric(node);
        }
    }

    class TTConGetHeaderRow implements ITTConstructor {
        public TinyTableExpression getTTConstructor(Element node) {
            return new TTGetHeaderRow(node);
        }
    }

    public void addConstructor(String name, ITTConstructor del) {
        if (_ttConstructors.containsKey(name))
            _ttConstructors.remove(name);
        _ttConstructors.put(name, del);
    }

    @Override
    public boolean supportsOperator(Element customOperatorNode) {
        Element coElement = customOperatorNode;
        if (!StringUtils.equals("TABLE", coElement.getAttribute("type").getValue())) {
            return false;
        }
        return _ttConstructors.containsKey(coElement.getAttribute("functionName").getValue());
    }

    @Override
    public Expression createExpression(Element customOperatorNode) {
        Element coElement = customOperatorNode;
        return (Expression) _ttConstructors.get(coElement.getAttribute("functionName").getValue())
                .getTTConstructor(coElement);
    }
}