Java tutorial
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We also recommend that a * file or class name and description of purpose be included on the * same "printed page" as the copyright notice for easier * identification within third-party archives. * * Copyright 21013 Angelo Zerr * * Licensed 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 com.mongodb.jee.util; import java.io.IOException; import java.io.InputStream; import java.io.StringWriter; import java.util.Iterator; import org.bson.types.BasicBSONList; import com.mongodb.BasicDBList; import com.mongodb.DBObject; import com.mongodb.jee.util.org.apache.commons.io.IOUtils; /** * Helper classes for BSON object. * */ public class BSONHelper { /** * Transform the JSON array stream to iterable DBObject * * @param entityStream * the JSON array stream. * @return * @throws IOException */ public static Iterable<DBObject> toIterable(InputStream entityStream) throws IOException { // FIXME : JSON#parse should manage stream and not only String. StringWriter writer = new StringWriter(); IOUtils.copy(entityStream, writer); String json = writer.toString(); BasicDBList o = (BasicDBList) JSON.parse(json); return BSONHelper.toIterable(o); } /** * Transform the BSON array to iterable DBObject. * * @param list * @return */ public static Iterable<DBObject> toIterable(BasicBSONList list) { final Iterator<DBObject> it = toIterator(list); return new Iterable<DBObject>() { public Iterator<DBObject> iterator() { return it; } }; } /** * Transform the BSON array to iterator DBObject. * * @param list * @return */ public static Iterator<DBObject> toIterator(BasicBSONList list) { return new BasicBSONListWrapper(list); } /** * BasicBSONList wrapper. * */ static class BasicBSONListWrapper implements Iterator<DBObject> { private final Iterator<Object> it; public BasicBSONListWrapper(BasicBSONList list) { this.it = list.iterator(); } public boolean hasNext() { return it.hasNext(); } public DBObject next() { return (DBObject) it.next(); } public void remove() { it.remove(); } } }