| /* |
| * 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.geode.rest.internal.web.controllers.support; |
| |
| import java.io.IOException; |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.Iterator; |
| import java.util.List; |
| |
| import javax.xml.bind.annotation.XmlRootElement; |
| import javax.xml.bind.annotation.XmlType; |
| |
| import com.fasterxml.jackson.core.JsonGenerator; |
| import com.fasterxml.jackson.databind.JsonSerializable; |
| import com.fasterxml.jackson.databind.SerializerProvider; |
| import com.fasterxml.jackson.databind.jsontype.TypeSerializer; |
| import org.springframework.util.Assert; |
| import org.springframework.util.StringUtils; |
| |
| import org.apache.geode.pdx.JSONFormatter; |
| import org.apache.geode.pdx.PdxInstance; |
| import org.apache.geode.rest.internal.web.util.JsonWriter; |
| |
| /** |
| * The RegionData class is a container for data fetched from a GemFire Cache Region. |
| * |
| * @see com.fasterxml.jackson.databind.JsonSerializable |
| * @see java.lang.Iterable |
| * @since GemFire 8.0 |
| */ |
| @SuppressWarnings("unused") |
| @XmlRootElement(name = "region") |
| @XmlType(name = "org.gopivotal.app.web.controllers.support.RegionData") |
| public class RegionData<T> implements Iterable<T>, JsonSerializable { |
| |
| private final List<T> data = new ArrayList<T>(); |
| |
| private String regionNamePath; |
| |
| public RegionData() {} |
| |
| public RegionData(final String regionNamePath) { |
| setRegionNamePath(regionNamePath); |
| } |
| |
| public String getRegionNamePath() { |
| Assert.state(StringUtils.hasText(this.regionNamePath), |
| "The Region name/path was not properly initialized!"); |
| return regionNamePath; |
| } |
| |
| public void setRegionNamePath(final String regionNamePath) { |
| Assert.hasText(regionNamePath, "The name or path of the Region must be specified!"); |
| this.regionNamePath = regionNamePath; |
| } |
| |
| public RegionData<T> add(final T data) { |
| this.data.add(data); |
| return this; |
| } |
| |
| public RegionData<T> add(final T... data) { |
| for (final T element : data) { |
| if (element != null) { |
| add(element); |
| } |
| } |
| |
| return this; |
| } |
| |
| public RegionData<T> add(final Iterable<T> data) { |
| for (final T element : data) { |
| add(element); |
| } |
| |
| return this; |
| } |
| |
| public T get(final int index) { |
| return list().get(index); |
| } |
| |
| public boolean isEmpty() { |
| return this.data.isEmpty(); |
| } |
| |
| @Override |
| public Iterator<T> iterator() { |
| return list().iterator(); |
| } |
| |
| public List<T> list() { |
| return Collections.unmodifiableList(this.data); |
| } |
| |
| public int size() { |
| return this.data.size(); |
| } |
| |
| protected String convertToJson(final PdxInstance pdxObj) { |
| return (pdxObj != null ? JSONFormatter.toJSON(pdxObj) : null); |
| } |
| |
| @Override |
| public void serialize(final JsonGenerator jsonGenerator, |
| final SerializerProvider serializerProvider) throws IOException { |
| |
| jsonGenerator.writeStartObject(); |
| jsonGenerator.writeArrayFieldStart(getRegionNamePath()); |
| |
| for (T element : this) { |
| JsonWriter.writeValueAsJson(jsonGenerator, element, null); |
| } |
| |
| jsonGenerator.writeEndArray(); |
| jsonGenerator.writeEndObject(); |
| } |
| |
| @Override |
| public void serializeWithType(final JsonGenerator jsonGenerator, |
| final SerializerProvider serializerProvider, final TypeSerializer typeSerializer) |
| throws IOException { |
| // NOTE serializing "type" meta-data is not necessary in this case; just call serialize. |
| serialize(jsonGenerator, serializerProvider); |
| } |
| |
| } |