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Apache CXF Runtime JAXB DataBinding
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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.cxf.jaxb;

import java.lang.annotation.Annotation;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;

import javax.xml.bind.JAXBContext;
import javax.xml.bind.annotation.XmlAttachmentRef;
import javax.xml.bind.annotation.XmlList;
import javax.xml.bind.annotation.adapters.XmlJavaTypeAdapter;
import javax.xml.bind.attachment.AttachmentMarshaller;
import javax.xml.bind.attachment.AttachmentUnmarshaller;
import javax.xml.validation.Schema;

import org.apache.cxf.jaxb.attachment.JAXBAttachmentMarshaller;
import org.apache.cxf.jaxb.attachment.JAXBAttachmentUnmarshaller;
import org.apache.cxf.message.Attachment;
import org.apache.cxf.service.model.AbstractMessageContainer;
import org.apache.cxf.service.model.MessageInfo;
import org.apache.cxf.service.model.MessagePartInfo;
import org.apache.cxf.service.model.OperationInfo;

/**
 * 
 */
public abstract class JAXBDataBase {
    
    protected JAXBContext context; 
    protected Schema schema;
    protected Collection attachments;
    protected Integer mtomThreshold; // null if we should default.
    
    protected JAXBDataBase(JAXBContext ctx) {
        context = ctx;
    }
    
    public void setSchema(Schema s) {
        this.schema = s;
    }

    public void setJAXBContext(JAXBContext jc) {
        this.context = jc;
    }
    
    public Schema getSchema() {
        return schema;
    }
    public JAXBContext getJAXBContext() {
        return context;
    }

    public Collection getAttachments() {
        return attachments;
    }

    public void setAttachments(Collection attachments) {
        this.attachments = attachments;
    }

    protected AttachmentUnmarshaller getAttachmentUnmarshaller() {
        return new JAXBAttachmentUnmarshaller(attachments);
    }

    protected AttachmentMarshaller getAttachmentMarshaller() {
        return new JAXBAttachmentMarshaller(attachments, mtomThreshold);
    }
    
    public void setProperty(String prop, Object value) {
    }
    
    protected Annotation[] getJAXBAnnotation(MessagePartInfo mpi) {
        List annoList = null;
        if (mpi != null) {
            annoList = extractJAXBAnnotations((Annotation[])mpi.getProperty("parameter.annotations"));
            if (annoList == null) {
                annoList = extractJAXBAnnotations(getReturnMethodAnnotations(mpi));
            }
        }
        return annoList == null ? new Annotation[0] : annoList.toArray(new Annotation[annoList.size()]);       
    }
    
    private List extractJAXBAnnotations(Annotation[] anns) {
        List annoList = null;
        if (anns != null) {
            for (Annotation ann : anns) {
                if (ann instanceof XmlList || ann instanceof XmlAttachmentRef
                    || ann instanceof XmlJavaTypeAdapter) {
                    if (annoList == null) {
                        annoList = new ArrayList();
                    }
                    annoList.add(ann);
                }
            }
        }
        return annoList;
    }
    
    private Annotation[] getReturnMethodAnnotations(MessagePartInfo mpi) {
        AbstractMessageContainer mi = mpi.getMessageInfo();
        if (mi == null || !isOutputMessage(mi)) {
            return null;
        }
        OperationInfo oi = mi != null ? mi.getOperation() : null;
        return oi != null ? (Annotation[])oi.getProperty("method.return.annotations") : null;
    }
    
    protected boolean isOutputMessage(AbstractMessageContainer messageContainer) {
        if (messageContainer instanceof MessageInfo) {
            return MessageInfo.Type.OUTPUT.equals(((MessageInfo)messageContainer).getType());
        }
        return false;
    }

    public Integer getMtomThreshold() {
        return mtomThreshold;
    }

    public void setMtomThreshold(Integer threshold) {
        this.mtomThreshold = threshold;
    }
    
    protected final boolean honorJAXBAnnotations(MessagePartInfo part) {
        if (part == null) {
            return false;
        }
        if (!part.isElement()) {
            //RPC-Lit always needs to look for these
            return true;
        }
        //certain cases that use XmlJavaTypeAdapters will require this and the
        //JAXBSchemaInitializer will set this.
        Boolean b = (Boolean)part.getProperty("honor.jaxb.annotations");
        return b == null ? false : b;
    }
    
    
}