001/*
002 * (C) Copyright 2012 Nuxeo SA (http://nuxeo.com/) and others.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *     http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 *
016 * Contributors:
017 *     ataillefer
018 */
019
020package org.nuxeo.ecm.core.io.impl.plugins;
021
022import java.io.IOException;
023
024import org.nuxeo.ecm.core.api.CoreSession;
025import org.nuxeo.ecm.core.api.DocumentModel;
026import org.nuxeo.ecm.core.api.DocumentRef;
027import org.nuxeo.ecm.core.io.ExportedDocument;
028import org.nuxeo.ecm.core.io.impl.TypedExportedDocumentImpl;
029
030/**
031 * @author <a href="mailto:ataillefer@nuxeo.com">Antoine Taillefer</a>
032 * @since 5.6
033 */
034public class TypedSingleDocumentReader extends SingleDocumentReader {
035
036    public TypedSingleDocumentReader(CoreSession session, DocumentModel root) {
037        super(session, root);
038    }
039
040    public TypedSingleDocumentReader(CoreSession session, DocumentRef root) {
041        this(session, session.getDocument(root));
042    }
043
044    @Override
045    public ExportedDocument read() throws IOException {
046        if (doc != null) {
047            if (readDone && !enableRepeatedReads) {
048                return null;
049            } else {
050                readDone = true;
051                return new TypedExportedDocumentImpl(doc);
052            }
053        }
054        doc = null;
055        return null;
056    }
057
058}