com.itude.mobile.mobbl.core.model.parser.MBJsonDocumentParser.java Source code

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Here is the source code for com.itude.mobile.mobbl.core.model.parser.MBJsonDocumentParser.java

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/*
 * (C) Copyright Itude Mobile B.V., The Netherlands
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.itude.mobile.mobbl.core.model.parser;

import java.util.List;

import org.json.JSONArray;
import org.json.JSONObject;

import com.itude.mobile.mobbl.core.configuration.MBDefinition;
import com.itude.mobile.mobbl.core.configuration.mvc.MBAttributeDefinition;
import com.itude.mobile.mobbl.core.configuration.mvc.MBDocumentDefinition;
import com.itude.mobile.mobbl.core.configuration.mvc.MBElementDefinition;
import com.itude.mobile.mobbl.core.model.MBDocument;
import com.itude.mobile.mobbl.core.model.MBElement;
import com.itude.mobile.mobbl.core.model.MBElementContainer;
import com.itude.mobile.mobbl.core.model.exceptions.MBParseErrorException;

/**
 * Parser for JSON type documents
 *
 */
public class MBJsonDocumentParser implements MBDocumentParser {

    @Override
    public MBDocument getDocumentWithData(byte[] data, MBDocumentDefinition definition) {
        try {
            String string = new String(data, "UTF-8");
            MBDocument result = MBJsonDocumentParser.getDocumentWithString(string, definition);

            return result;
        } catch (Exception e) {
            String message = "Error parsing document " + definition.getName() + " : " + e.getMessage();
            throw new MBParseErrorException(message, e);
        }

    }

    public static MBDocument getDocumentWithString(String string, MBDocumentDefinition definition) {
        MBJsonDocumentParser parser = new MBJsonDocumentParser();
        MBDocument result = parser.parseJsonString(string, definition);

        return result;
    }

    public MBDocument parseJsonString(String jsonString, MBDocumentDefinition definition) {

        try {
            JSONObject jsonDoc = new JSONObject(jsonString);
            MBDocument document = new MBDocument(definition);
            // ignore the first Element, use its child as the root
            JSONObject jsonRoot = jsonDoc.optJSONObject(jsonDoc.names().getString(0));

            // kick off recursive construction, starting with root element
            parseJsonValue(jsonRoot, definition, document);

            return document;
        } catch (Exception e) {
            String message = "Error parsing document " + definition.getName() + " : " + e.getMessage();
            throw new MBParseErrorException(message, e);
        }

    }

    public void parseJsonValue(Object jsonValue, MBDefinition definition, MBElementContainer element) {

        if (jsonValue instanceof JSONObject) {
            JSONObject jsonObject = (JSONObject) jsonValue;
            List<MBElementDefinition> elements = definition.getChildElements();

            for (MBElementDefinition childDefinition : elements) {

                try {
                    if (!jsonObject.has(childDefinition.getName())) {
                        element.addElement(childDefinition.createElement());
                    } else {

                        Object jsonChild = jsonObject.get(childDefinition.getName());

                        if (!(jsonChild instanceof JSONObject) && !(jsonChild instanceof JSONArray)) {
                            MBElement childElement = childDefinition.createElement();

                            if (jsonChild instanceof String) {
                                childElement.setBodyText((String) jsonChild);
                            }
                            if (jsonChild instanceof Integer) {
                                childElement.setBodyText(Integer.toString((Integer) jsonChild));
                            }
                            if (jsonChild instanceof Double) {
                                childElement.setBodyText(Double.toString((Double) jsonChild));
                            }
                            if (jsonChild instanceof Long) {
                                childElement.setBodyText(Long.toString((Long) jsonChild));
                            }

                            element.addElement(childElement);
                        }

                        if (jsonChild instanceof JSONObject) {
                            MBElement childElement = childDefinition.createElement();
                            element.addElement(childElement);
                            parseJsonValue((jsonChild), childDefinition, childElement);
                        }

                        if (jsonChild instanceof JSONArray) {

                            for (int i = 0; i < ((JSONArray) jsonChild).length(); i++) {
                                MBElement childElement = childDefinition.createElement();
                                element.addElement(childElement);
                                parseJsonValue(((JSONArray) jsonChild).get(i), childDefinition, childElement);
                            }
                        }
                    }
                } catch (Exception e) {
                    String message = "Error parsing value : " + childDefinition.getName() + " of document "
                            + definition.getName() + " : " + e.getMessage();
                    throw new MBParseErrorException(message, e);
                }

            }

        }

        // get attributes
        if (definition instanceof MBElementDefinition && element instanceof MBElement) {

            try {
                for (MBAttributeDefinition attributeDefinition : ((MBElementDefinition) definition)
                        .getAttributes()) {
                    JSONObject jsonObject = (JSONObject) jsonValue;
                    Object attributeValue = JSONObject.NULL;
                    if (jsonObject.has(attributeDefinition.getName()))
                        attributeValue = jsonObject.get(attributeDefinition.getName());

                    if (attributeValue == JSONObject.NULL)
                        attributeValue = attributeDefinition.getDefaultValue();
                    else
                        attributeValue = attributeValue.toString();

                    ((MBElement) element).setAttributeValue((String) attributeValue, attributeDefinition.getName());

                }
            } catch (Exception e) {
                String message = "Error parsing document " + definition.getName() + " : " + e.getMessage();
                throw new MBParseErrorException(message, e);
            }

        }

    }

}