| /* |
| * 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.axis2.json; |
| |
| import org.apache.axiom.om.OMException; |
| import org.apache.axiom.om.ds.AbstractPullOMDataSource; |
| import org.codehaus.jettison.AbstractXMLInputFactory; |
| import org.codehaus.jettison.json.JSONTokener; |
| |
| import javax.xml.stream.XMLStreamReader; |
| import javax.xml.stream.XMLStreamException; |
| import java.io.IOException; |
| import java.io.Reader; |
| import java.io.BufferedReader; |
| |
| /** |
| * JSONDataSource keeps the JSON String inside and consumes it when needed. This is to be kept in |
| * the OMSourcedElement and can be used either to expand the tree or get the JSON String |
| * directly without expanding. This uses the "Mapped" JSON convention. |
| */ |
| |
| public abstract class AbstractJSONDataSource extends AbstractPullOMDataSource { |
| |
| private Reader jsonReader; |
| private String jsonString; |
| private boolean isRead = false; |
| |
| public AbstractJSONDataSource(Reader jsonReader) { |
| this.jsonReader = jsonReader; |
| } |
| |
| public final XMLStreamReader getReader() throws XMLStreamException { |
| return getXMLInputFactory().createXMLStreamReader(new JSONTokener(getJSONString())); |
| } |
| |
| protected abstract AbstractXMLInputFactory getXMLInputFactory() throws XMLStreamException; |
| |
| public boolean isDestructiveRead() { |
| // TODO: for the moment the data source in not destructive (because it reads the entire message into memory before processing it), but this will change... |
| return false; |
| } |
| |
| @Override |
| public Object getObject() { |
| return getJSONString(); |
| } |
| |
| //returns the json string by consuming the JSON input stream. |
| private String getJSONString() { |
| if (isRead) { |
| return jsonString; |
| } else { |
| try { |
| BufferedReader br = new BufferedReader(jsonReader); |
| StringBuilder sb = new StringBuilder(512); |
| char[] tempBuf = new char[512]; |
| int readLen; |
| |
| while((readLen = br.read(tempBuf)) != -1) { |
| sb.append(tempBuf, 0, readLen); |
| } |
| jsonString = sb.toString(); |
| } catch (IOException e) { |
| throw new OMException(); |
| } |
| isRead = true; |
| return jsonString; |
| } |
| } |
| } |