org.cyclades.engine.stroma.STROMARequestParameterAggregate Maven / Gradle / Ivy

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 * Copyright (c) 2012, THE BOARD OF TRUSTEES OF THE LELAND STANFORD JUNIOR UNIVERSITY
 * All rights reserved.
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 * are permitted provided that the following conditions are met:
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 *    Redistributions of source code must retain the above copyright notice,
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 *    and/or other materials provided with the distribution.
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 *    may be used to endorse or promote products derived from this software without
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package org.cyclades.engine.stroma;

import java.util.Map;
import java.util.HashMap;
import java.util.List;
import java.util.Vector;
import org.cyclades.engine.NyxletSession;
import org.cyclades.engine.util.MapHelper;
import org.w3c.dom.Node;
import org.cyclades.xml.comparitor.XMLComparitor;
import org.json.JSONObject;

public class STROMARequestParameterAggregate {

    public static Map> getParameters (NyxletSession nyxletSession, String[] requiredParameters) throws Exception {
        return getParameters(nyxletSession, nyxletSession.getParameterMap(), requiredParameters);
    }

    @SuppressWarnings("unchecked")
    public static Map> getParameters (NyxletSession nyxletSession, Map> secondaryParameters, String[] requiredParameters) throws Exception {
        final String eLabel = "STROMARequestParameterAggregate.getParameters: ";
        try {
            if (nyxletSession.getDataObject() != null) {
                Object baseParameters = getBaseParametersFromMeta(nyxletSession);
                return MapHelper.immutableParameterMap(MapHelper.mergeMaps(
                        baseParameters == null ? new HashMap() : nyxletSession.getMetaTypeEnum().getParameterMapFromMeta(baseParameters),
                                secondaryParameters, requiredParameters));
            } else {
                return MapHelper.immutableParameterMap(MapHelper.mergeMaps(secondaryParameters, null, requiredParameters));
            }
        } catch (Exception e) {
            throw new Exception(eLabel + e);
        }
    }

    private static Object getBaseParametersFromMeta (NyxletSession nyxletSession) throws Exception {
        final String eLabel = "STROMARequestParameterAggregate.getBaseParametersFromMeta: ";
        try {
            Object baseParameters = null;
            switch (nyxletSession.getMetaTypeEnum()) {
            case XML:
                @SuppressWarnings("unchecked")
                Vector results = XMLComparitor.getMatchingChildNodes((Node)nyxletSession.getDataObject(), BASE_PARAMETERS);
                if (results.size() > 0) baseParameters = results.firstElement().getChildNodes();
                break;
            case JSON:
                try {
                    baseParameters = ((JSONObject)nyxletSession.getDataObject()).getJSONArray(BASE_PARAMETERS);
                } catch (Exception e) {
                    baseParameters = null;
                }
                break;
            default:
                throw new Exception("Invalid meta type");
            }
            return baseParameters;
        } catch (Exception e) {
            throw new Exception(eLabel + e);
        }
    }

    private final static String BASE_PARAMETERS = "parameters";
}