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Apache CXF example source code file (Base64Type.java)

This example Apache CXF source code file (Base64Type.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Apache CXF tags/keywords

base64type, base64type, bytearrayoutputstream, bytearrayoutputstream, bytearraytype, chararraywriter, context, could, could, databindingexception, databindingexception, io, object, override, xmlstreamexception

The Apache CXF Base64Type.java source code

/**
 * 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.cxf.aegis.type.basic;

import java.io.ByteArrayOutputStream;
import java.io.CharArrayWriter;

import javax.xml.stream.XMLStreamConstants;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.XMLStreamReader;

import org.apache.cxf.aegis.Context;
import org.apache.cxf.aegis.DatabindingException;
import org.apache.cxf.aegis.type.AegisType;
import org.apache.cxf.aegis.type.mtom.AbstractXOPType;
import org.apache.cxf.aegis.type.mtom.ByteArrayType;
import org.apache.cxf.aegis.xml.MessageReader;
import org.apache.cxf.aegis.xml.MessageWriter;
import org.apache.cxf.common.util.Base64Exception;
import org.apache.cxf.common.util.Base64Utility;

/**
 * Converts back and forth to byte[] objects.
 * There is a co-routine between this class and the MTOM ByteArrayType. This class can accept either 
 * inline base64 or an MTOM attachment. It passes the problem over the ByteArrayType for the later. 
 * @author <a href="mailto:dan@envoisolutions.com">Dan Diephouse
 */
public class Base64Type extends AegisType {
    private AbstractXOPType optimizedType;

    public Base64Type() {
        super();
        // no MTOM for this type.
        optimizedType = new ByteArrayType(false, null);
    }
    
    public Base64Type(AbstractXOPType xopType) {
        super();
        optimizedType = xopType;
    }
    
    @Override
    public Object readObject(MessageReader mreader, Context context) throws DatabindingException {
        XMLStreamReader reader = mreader.getXMLStreamReader();

        ByteArrayOutputStream bos = new ByteArrayOutputStream();

        try {
            reader.next();
            while (!reader.isCharacters() && !reader.isEndElement() && !reader.isStartElement()) {
                reader.next();
            }
            
            if (reader.isStartElement() && reader.getName().equals(AbstractXOPType.XOP_INCLUDE)) {
                return optimizedType.readMtoM(mreader, context);
            }

            if (reader.isEndElement()) {
                reader.next();
                return new byte[0];
            }

            CharArrayWriter writer = new CharArrayWriter(2048);
            while (reader.isCharacters()) {
                writer.write(reader.getTextCharacters(),
                             reader.getTextStart(),
                             reader.getTextLength());
                reader.next();
            }
            Base64Utility.decode(writer.toCharArray(), 0, writer.size(), bos);

            while (reader.getEventType() != XMLStreamConstants.END_ELEMENT) {
                reader.next();
            }

            // Advance just past the end element
            reader.next();

            return bos.toByteArray();
        } catch (Base64Exception e) {
            throw new DatabindingException("Could not parse base64Binary data.", e);
        } catch (XMLStreamException e) {
            throw new DatabindingException("Could not parse base64Binary data.", e);
        }
    }

    @Override
    public void writeObject(Object object,
                            MessageWriter writer,
                            Context context) throws DatabindingException {
        boolean mtomEnabled = context.isMtomEnabled();
        if (mtomEnabled) {
            optimizedType.writeObject(object, writer, context);
            return;
        }
        
        byte[] data = (byte[])object;

        if (data != null && data.length > 0) {
            writer.writeValue(Base64Utility.encode(data));
        }
    }
}

Other Apache CXF examples (source code examples)

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