001/*
002 * (C) Copyright 2006-2007 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 *     Nuxeo - initial API and implementation
018 *
019 */
020package org.nuxeo.ecm.core.convert.plugins.text.extractors;
021
022import java.io.IOException;
023import java.io.InputStream;
024import java.io.Serializable;
025import java.util.Map;
026
027import javax.xml.parsers.ParserConfigurationException;
028
029import org.nuxeo.ecm.core.api.Blob;
030import org.nuxeo.ecm.core.api.blobholder.BlobHolder;
031import org.nuxeo.ecm.core.api.blobholder.SimpleBlobHolder;
032import org.nuxeo.ecm.core.api.impl.blob.StringBlob;
033import org.nuxeo.ecm.core.convert.api.ConversionException;
034import org.nuxeo.ecm.core.convert.extension.Converter;
035import org.nuxeo.ecm.core.convert.extension.ConverterDescriptor;
036import org.xml.sax.SAXException;
037
038public class XML2TextConverter implements Converter {
039
040    @Override
041    public BlobHolder convert(BlobHolder holder, Map<String, Serializable> parameters) throws ConversionException {
042        return new SimpleBlobHolder(new StringBlob(convert(holder.getBlob(), parameters)));
043    }
044
045    String convert(Blob blob, Map<String, Serializable> parameters) {
046        if (blob.getLength() == 0L) {
047            return "";
048        }
049        try (InputStream stream = blob.getStream()) {
050            Xml2TextHandler xml2text = new Xml2TextHandler();
051            return xml2text.parse(stream);
052        } catch (IOException | SAXException | ParserConfigurationException e) {
053            throw new ConversionException("Error during XML2Text conversion", e);
054        }
055    }
056
057    @Override
058    public void init(ConverterDescriptor descriptor) {
059    }
060
061}