| /* |
| * 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.server.core.serializer.json; |
| |
| import java.io.IOException; |
| |
| import org.apache.olingo.commons.api.Constants; |
| import org.apache.olingo.commons.api.edm.EdmEntityContainer; |
| import org.apache.olingo.commons.api.edm.EdmEntitySet; |
| import org.apache.olingo.commons.api.edm.EdmFunctionImport; |
| import org.apache.olingo.commons.api.edm.EdmSingleton; |
| import org.apache.olingo.server.api.ServiceMetadata; |
| import org.apache.olingo.server.api.serializer.SerializerException; |
| |
| import com.fasterxml.jackson.core.JsonGenerator; |
| |
| public class ServiceDocumentJsonSerializer { |
| public static final String KIND = "kind"; |
| |
| public static final String FUNCTION_IMPORT = "FunctionImport"; |
| public static final String SINGLETON = "Singleton"; |
| public static final String SERVICE_DOCUMENT = "ServiceDocument"; |
| |
| private final ServiceMetadata metadata; |
| private final String serviceRoot; |
| private final boolean isODataMetadataNone; |
| |
| public ServiceDocumentJsonSerializer(final ServiceMetadata metadata, final String serviceRoot, |
| final boolean isODataMetadataNone) throws SerializerException { |
| if (metadata == null || metadata.getEdm() == null) { |
| throw new SerializerException("Service Metadata and EDM must not be null for a service.", |
| SerializerException.MessageKeys.NULL_METADATA_OR_EDM); |
| } |
| this.metadata = metadata; |
| this.serviceRoot = serviceRoot; |
| this.isODataMetadataNone = isODataMetadataNone; |
| } |
| |
| public void writeServiceDocument(final JsonGenerator gen) throws IOException { |
| gen.writeStartObject(); |
| |
| if (!isODataMetadataNone) { |
| final String metadataUri = |
| (serviceRoot == null ? "" : |
| serviceRoot.endsWith("/") ? serviceRoot : (serviceRoot + "/")) |
| + Constants.METADATA; |
| gen.writeObjectField(Constants.JSON_CONTEXT, metadataUri); |
| |
| if (metadata != null |
| && metadata.getServiceMetadataETagSupport() != null |
| && metadata.getServiceMetadataETagSupport().getMetadataETag() != null) { |
| gen.writeStringField(Constants.JSON_METADATA_ETAG, |
| metadata.getServiceMetadataETagSupport().getMetadataETag()); |
| } |
| } |
| |
| gen.writeArrayFieldStart(Constants.VALUE); |
| if(metadata != null){ |
| final EdmEntityContainer container = metadata.getEdm().getEntityContainer(); |
| if (container != null) { |
| writeEntitySets(gen, container); |
| writeFunctionImports(gen, container); |
| writeSingletons(gen, container); |
| } |
| } |
| } |
| |
| private void writeEntitySets(final JsonGenerator gen, final EdmEntityContainer container) throws IOException { |
| for (EdmEntitySet edmEntitySet : container.getEntitySets()) { |
| if (edmEntitySet.isIncludeInServiceDocument()) { |
| writeElement(gen, null, edmEntitySet.getName(), edmEntitySet.getName(), edmEntitySet.getTitle()); |
| } |
| } |
| } |
| |
| private void writeFunctionImports(final JsonGenerator gen, final EdmEntityContainer container) throws IOException { |
| for (EdmFunctionImport edmFI : container.getFunctionImports()) { |
| if (edmFI.isIncludeInServiceDocument()) { |
| writeElement(gen, FUNCTION_IMPORT, edmFI.getName(), edmFI.getName(), edmFI.getTitle()); |
| } |
| } |
| } |
| |
| private void writeSingletons(final JsonGenerator gen, final EdmEntityContainer container) throws IOException { |
| for (EdmSingleton edmSingleton : container.getSingletons()) { |
| writeElement(gen, SINGLETON, edmSingleton.getName(), edmSingleton.getName(), edmSingleton.getTitle()); |
| } |
| } |
| |
| private void writeElement(final JsonGenerator gen, final String kind, final String reference, final String name, |
| final String title) |
| throws IOException { |
| gen.writeStartObject(); |
| gen.writeObjectField(Constants.JSON_NAME, name); |
| if (title != null) { |
| gen.writeObjectField(Constants.JSON_TITLE, title); |
| } |
| gen.writeObjectField(Constants.JSON_URL, reference); |
| if (kind != null) { |
| gen.writeObjectField(KIND, kind); |
| } |
| gen.writeEndObject(); |
| } |
| } |