tinyctrlscoringengine.CtrlCustomOpFactory.java Source code

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Here is the source code for tinyctrlscoringengine.CtrlCustomOpFactory.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 tinyctrlscoringengine;

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 CtrlCustomOpFactory implements ICustomOperatorFactory {
    interface CtrlConstructor {
        CtrlExpression getExpression(Element node);
    }

    private Map<String, CtrlConstructor> _ctrlConstructors = new HashMap<>();

    public CtrlCustomOpFactory() {
        addConstructor("mapExpression", new CCMapExpression());
        addConstructor("stringToFloat", new CCStringToFloat());
        addConstructor("COUNTDOUBLEINRANGE", new CCCountDoubleInRange());
        addConstructor("COUNTBOOL", new CCCountBoolean());
        addConstructor("MAXINT", new CCMaxInt());
        addConstructor("MININT", new CCMinInt());
    }

    class CCMinInt implements CtrlConstructor {
        public CtrlExpression getExpression(Element node) {
            return new CtrlMinInt(node);
        }
    }

    class CCMaxInt implements CtrlConstructor {
        public CtrlExpression getExpression(Element node) {
            return new CtrlMaxInt(node);
        }
    }

    class CCMapExpression implements CtrlConstructor {
        public CtrlExpression getExpression(Element node) {
            return new CtrlMapExpression(node);
        }
    }

    class CCStringToFloat implements CtrlConstructor {
        public CtrlExpression getExpression(Element node) {
            return new CtrlStringToFloat(node);
        }
    }

    class CCCountDoubleInRange implements CtrlConstructor {
        public CtrlExpression getExpression(Element node) {
            return new CtrlCountDoubleInRange(node);
        }
    }

    class CCCountBoolean implements CtrlConstructor {
        public CtrlExpression getExpression(Element node) {
            return new CtrlCountBoolean(node);
        }
    }

    private void addConstructor(String name, CtrlConstructor del) {
        if (_ctrlConstructors.containsKey(name))
            _ctrlConstructors.remove(name);
        _ctrlConstructors.put(name, del);
    }

    @Override
    public boolean supportsOperator(Element customOperatorNode) {
        Element coElement = customOperatorNode;

        if (!StringUtils.equals(coElement.getAttribute("type").getValue(), "CTRL"))
            return false;

        return _ctrlConstructors.containsKey(coElement.getAttribute("functionName").getValue());
    }

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