org.apache.olingo.commons.core.data.JSONEntrySerializer.java Source code

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Here is the source code for org.apache.olingo.commons.core.data.JSONEntrySerializer.java

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/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 org.apache.olingo.commons.core.data;

import com.fasterxml.jackson.core.JsonGenerator;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.SerializerProvider;
import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.apache.commons.lang3.StringUtils;
import org.apache.olingo.commons.api.Constants;
import org.apache.olingo.commons.api.data.Entry;
import org.apache.olingo.commons.api.data.Link;
import org.apache.olingo.commons.api.data.Property;
import org.apache.olingo.commons.api.domain.ODataLinkType;

/**
 * Writes out JSON string from an entry.
 */
public class JSONEntrySerializer extends AbstractJsonSerializer<JSONEntryImpl> {

    @Override
    protected void doSerialize(final JSONEntryImpl entry, final JsonGenerator jgen,
            final SerializerProvider provider) throws IOException, JsonProcessingException {

        jgen.writeStartObject();

        if (entry.getMetadata() != null) {
            jgen.writeStringField(Constants.JSON_METADATA, entry.getMetadata().toASCIIString());
        }
        if (entry.getId() != null) {
            jgen.writeStringField(Constants.JSON_ID, entry.getId());
        }

        final Map<String, List<String>> entitySetLinks = new HashMap<String, List<String>>();

        for (Link link : entry.getNavigationLinks()) {
            ODataLinkType type = null;
            try {
                type = ODataLinkType.fromString(version, link.getRel(), link.getType());
            } catch (IllegalArgumentException e) {
                // ignore   
            }

            if (type == ODataLinkType.ENTITY_SET_NAVIGATION) {
                final List<String> uris;
                if (entitySetLinks.containsKey(link.getTitle())) {
                    uris = entitySetLinks.get(link.getTitle());
                } else {
                    uris = new ArrayList<String>();
                    entitySetLinks.put(link.getTitle(), uris);
                }
                uris.add(link.getHref());
            } else {
                if (StringUtils.isNotBlank(link.getHref())) {
                    jgen.writeStringField(link.getTitle() + Constants.JSON_BIND_LINK_SUFFIX, link.getHref());
                }
            }

            if (link.getInlineEntry() != null) {
                jgen.writeObjectField(link.getTitle(), link.getInlineEntry());
            } else if (link.getInlineFeed() != null) {
                jgen.writeArrayFieldStart(link.getTitle());
                for (Entry subEntry : link.getInlineFeed().getEntries()) {
                    jgen.writeObject(subEntry);
                }
                jgen.writeEndArray();
            }
        }
        for (Map.Entry<String, List<String>> entitySetLink : entitySetLinks.entrySet()) {
            jgen.writeArrayFieldStart(entitySetLink.getKey() + Constants.JSON_BIND_LINK_SUFFIX);
            for (String uri : entitySetLink.getValue()) {
                jgen.writeString(uri);
            }
            jgen.writeEndArray();
        }

        for (Link link : entry.getMediaEditLinks()) {
            if (link.getTitle() == null) {
                jgen.writeStringField(Constants.JSON_MEDIAEDIT_LINK, link.getHref());
            }

            if (link.getInlineEntry() != null) {
                jgen.writeObjectField(link.getTitle(), link.getInlineEntry());
            }
            if (link.getInlineFeed() != null) {
                jgen.writeArrayFieldStart(link.getTitle());
                for (Entry subEntry : link.getInlineFeed().getEntries()) {
                    jgen.writeObject(subEntry);
                }
                jgen.writeEndArray();
            }
        }

        for (Property property : entry.getProperties()) {
            property(jgen, property, property.getName());
        }

        jgen.writeEndObject();
    }
}