org.apache.olingo.client.core.serialization.JsonEntitySerializer.java Source code

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Here is the source code for org.apache.olingo.client.core.serialization.JsonEntitySerializer.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.client.core.serialization;

import java.io.IOException;

import org.apache.commons.lang3.StringUtils;
import org.apache.olingo.client.api.data.ResWrap;
import org.apache.olingo.commons.api.Constants;
import org.apache.olingo.commons.api.data.Annotation;
import org.apache.olingo.commons.api.data.Entity;
import org.apache.olingo.commons.api.data.Link;
import org.apache.olingo.commons.api.data.Operation;
import org.apache.olingo.commons.api.data.Property;
import org.apache.olingo.commons.api.edm.EdmPrimitiveTypeException;
import org.apache.olingo.commons.api.format.ContentType;
import org.apache.olingo.commons.core.edm.EdmTypeInfo;

import com.fasterxml.jackson.core.JsonGenerator;

/**
 * Writes out JSON string from an entity.
 */
public class JsonEntitySerializer extends JsonSerializer {

    public JsonEntitySerializer(final boolean serverMode, final ContentType contentType) {
        super(serverMode, contentType);
    }

    protected void doSerialize(final Entity entity, final JsonGenerator jgen)
            throws IOException, EdmPrimitiveTypeException {

        doContainerSerialize(new ResWrap<Entity>(null, null, entity), jgen);
    }

    protected void doContainerSerialize(final ResWrap<Entity> container, final JsonGenerator jgen)
            throws IOException, EdmPrimitiveTypeException {

        final Entity entity = container.getPayload();

        jgen.writeStartObject();

        if (serverMode) {
            if (container.getContextURL() != null) {
                jgen.writeStringField(Constants.JSON_CONTEXT, container.getContextURL().toASCIIString());
            }
            if (StringUtils.isNotBlank(container.getMetadataETag())) {
                jgen.writeStringField(Constants.JSON_METADATA_ETAG, container.getMetadataETag());
            }

            if (StringUtils.isNotBlank(entity.getETag())) {
                jgen.writeStringField(Constants.JSON_ETAG, entity.getETag());
            }
        }

        if (StringUtils.isNotBlank(entity.getType()) && !isODataMetadataNone(contentType)) {
            jgen.writeStringField(Constants.JSON_TYPE,
                    new EdmTypeInfo.Builder().setTypeExpression(entity.getType()).build().external());
        }

        if (entity.getId() != null && !isODataMetadataNone(contentType)) {
            jgen.writeStringField(Constants.JSON_ID, entity.getId().toASCIIString());
        }

        for (Annotation annotation : entity.getAnnotations()) {
            valuable(jgen, annotation, "@" + annotation.getTerm());
        }

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

        if (serverMode && entity.getEditLink() != null && StringUtils.isNotBlank(entity.getEditLink().getHref())) {
            jgen.writeStringField(Constants.JSON_EDIT_LINK, entity.getEditLink().getHref());

            if (entity.isMediaEntity()) {
                jgen.writeStringField(Constants.JSON_MEDIA_READ_LINK, entity.getEditLink().getHref() + "/$value");
            }
        }

        if (!isODataMetadataNone(contentType)) {
            links(entity, jgen);
        }

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

            if (link.getInlineEntity() != null) {
                jgen.writeObjectField(link.getTitle(), link.getInlineEntity());
            }
            if (link.getInlineEntitySet() != null) {
                jgen.writeArrayFieldStart(link.getTitle());
                for (Entity subEntry : link.getInlineEntitySet().getEntities()) {
                    jgen.writeObject(subEntry);
                }
                jgen.writeEndArray();
            }
        }

        if (serverMode) {
            for (Operation operation : entity.getOperations()) {
                jgen.writeObjectFieldStart(
                        "#" + StringUtils.substringAfterLast(operation.getMetadataAnchor(), "#"));
                jgen.writeStringField(Constants.ATTR_TITLE, operation.getTitle());
                jgen.writeStringField(Constants.ATTR_TARGET, operation.getTarget().toASCIIString());
                jgen.writeEndObject();
            }
        }

        jgen.writeEndObject();
    }
}