Package org.jrdf.query.server

Source Code of org.jrdf.query.server.ConfigurableRestletResource

/*
* $Header$
* $Revision: 982 $
* $Date: 2006-12-08 18:42:51 +1000 (Fri, 08 Dec 2006) $
*
* ====================================================================
*
* The Apache Software License, Version 1.1
*
* Copyright (c) 2003-2009 The JRDF Project.  All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
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*    the documentation and/or other materials provided with the
*    distribution.
*
* 3. The end-user documentation included with the redistribution, if
*    any, must include the following acknowlegement:
*       "This product includes software developed by the
*        the JRDF Project (http://jrdf.sf.net/)."
*    Alternately, this acknowlegement may appear in the software itself,
*    if and wherever such third-party acknowlegements normally appear.
*
* 4. The names "The JRDF Project" and "JRDF" must not be used to endorse
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*    newmana@users.sourceforge.net.
*
* 5. Products derived from this software may not be called "JRDF"
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* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the JRDF Project.  For more
* information on JRDF, please see <http://jrdf.sourceforge.net/>.
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*/

package org.jrdf.query.server;

import org.restlet.Context;
import org.restlet.data.MediaType;
import org.restlet.data.Request;
import org.restlet.data.Response;
import org.restlet.resource.Representation;
import org.restlet.resource.Resource;
import org.restlet.resource.Variant;
import org.springframework.beans.BeanUtils;

import java.util.Collections;
import java.util.LinkedHashMap;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;

/**
* A Spring-configurable Restlet Resource.
*
* @author Konstantin Laufer (laufer@cs.luc.edu)
*/
public class ConfigurableRestletResource extends Resource {
    private LinkedHashMap<MediaType, RepresentationFactory> representationTemplates;

    // TODO generation of representations of response entities methods other than GET
    // TODO think about how to deal with dependencies on so many concrete representations

    @Override
    public void init(final Context context, final Request request, final Response response) {
        // workaround for overzealous init method
        final ResourcePropertyHolder backup = new ResourcePropertyHolder();
        BeanUtils.copyProperties(this, backup);
        super.init(context, request, response);
        BeanUtils.copyProperties(backup, this);
    }

    @Override
    public List<Variant> getVariants() {
        final List<Variant> variants = new LinkedList<Variant>();
        for (MediaType mediaType : getRepresentationTemplates().keySet()) {
            variants.add(new Variant(mediaType));
        }
        return variants;
    }

    @Override
    public void setVariants(List<Variant> variants) {
        throw new UnsupportedOperationException("use setRepresentationTemplates instead");
    }

    public Map<MediaType, RepresentationFactory> getRepresentationTemplates() {
        if (representationTemplates != null) {
            return representationTemplates;
        } else {
            return Collections.emptyMap();
        }
    }

    public void setRepresentationTemplates(final Map<MediaType, RepresentationFactory> newRepresentationTemplates) {
        if (this.representationTemplates == null) {
            this.representationTemplates = new LinkedHashMap<MediaType, RepresentationFactory>();
        } else {
            this.representationTemplates.clear();
        }
        this.representationTemplates.putAll(newRepresentationTemplates);
    }

    protected Representation createTemplateRepresentation(final MediaType mediaType,
        final Map<String, Object> dataModel) {
        final RepresentationFactory factory = representationTemplates.get(mediaType);
        return factory.createRepresentation(mediaType, dataModel);
    }

}
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