TypedSingleDocumentReader.java

/*
 * (C) Copyright 2012 Nuxeo SA (http://nuxeo.com/) and others.
 *
 * 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.
 *
 * Contributors:
 *     ataillefer
 */

package org.nuxeo.ecm.core.io.impl.plugins;

import java.io.IOException;

import org.nuxeo.ecm.core.api.CoreSession;
import org.nuxeo.ecm.core.api.DocumentModel;
import org.nuxeo.ecm.core.api.DocumentRef;
import org.nuxeo.ecm.core.io.ExportedDocument;
import org.nuxeo.ecm.core.io.impl.TypedExportedDocumentImpl;

/**
 * @author <a href="mailto:ataillefer@nuxeo.com">Antoine Taillefer</a>
 * @since 5.6
 */
public class TypedSingleDocumentReader extends SingleDocumentReader {

    public TypedSingleDocumentReader(CoreSession session, DocumentModel root) {
        super(session, root);
    }

    public TypedSingleDocumentReader(CoreSession session, DocumentRef root) {
        this(session, session.getDocument(root));
    }

    @Override
    public ExportedDocument read() throws IOException {
        if (doc != null) {
            if (readDone && !enableRepeatedReads) {
                return null;
            } else {
                readDone = true;
                return new TypedExportedDocumentImpl(doc);
            }
        }
        doc = null;
        return null;
    }

}