org.apache.olingo.fit.utils.XMLElement.java Source code

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Here is the source code for org.apache.olingo.fit.utils.XMLElement.java

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/*
 * 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.olingo.fit.utils;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;

import javax.xml.stream.XMLEventReader;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.events.EndElement;
import javax.xml.stream.events.StartElement;

import org.apache.commons.io.IOUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class XMLElement {

    /**
     * Logger.
     */
    private static final Logger LOG = LoggerFactory.getLogger(XMLElement.class);

    private StartElement start;

    private EndElement end;

    private ByteArrayOutputStream content = new ByteArrayOutputStream();

    public StartElement getStart() {
        return start;
    }

    public void setStart(final StartElement start) {
        this.start = start;
    }

    public EndElement getEnd() {
        return end;
    }

    public void setEnd(final EndElement end) {
        this.end = end;
    }

    public InputStream getContent() throws XMLStreamException {
        return new ByteArrayInputStream(content.toByteArray());
    }

    public XMLEventReader getContentReader() throws XMLStreamException, IOException {
        return new XMLEventReaderWrapper(getContent());
    }

    public void setContent(final InputStream content) throws IOException {
        this.content.reset();

        final InputStreamReader reader = new InputStreamReader(content, Constants.ENCODING);
        final OutputStreamWriter writer = new OutputStreamWriter(this.content, Constants.ENCODING);
        IOUtils.copyLarge(reader, writer);

        writer.flush();
        IOUtils.closeQuietly(reader);
        IOUtils.closeQuietly(writer);
        IOUtils.closeQuietly(content);
    }

    public InputStream toStream() {
        InputStream res;
        try {
            final ByteArrayOutputStream bos = new ByteArrayOutputStream();
            final OutputStreamWriter osw = new OutputStreamWriter(bos, Constants.ENCODING);

            getStart().writeAsEncodedUnicode(osw);

            IOUtils.copy(getContent(), osw, Constants.ENCODING);

            getEnd().writeAsEncodedUnicode(osw);
            osw.flush();
            osw.close();

            res = new ByteArrayInputStream(bos.toByteArray());
        } catch (IOException e) {
            LOG.error("Error serializing element", e);
            res = null;
        } catch (XMLStreamException e) {
            LOG.error("Error serializing element", e);
            res = null;
        }
        return res;
    }
}