org.fabric3.introspection.xml.definitions.ExternalAttachmentLoader Maven / Gradle / Ivy

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/*
* Fabric3
* Copyright (c) 2009-2013 Metaform Systems
*
* Fabric3 is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as
* published by the Free Software Foundation, either version 3 of
* the License, or (at your option) any later version, with the
* following exception:
*
* Linking this software statically or dynamically with other
* modules is making a combined work based on this software.
* Thus, the terms and conditions of the GNU General Public
* License cover the whole combination.
*
* As a special exception, the copyright holders of this software
* give you permission to link this software with independent
* modules to produce an executable, regardless of the license
* terms of these independent modules, and to copy and distribute
* the resulting executable under terms of your choice, provided
* that you also meet, for each linked independent module, the
* terms and conditions of the license of that module. An
* independent module is a module which is not derived from or
* based on this software. If you modify this software, you may
* extend this exception to your version of the software, but
* you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version.
*
* Fabric3 is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
* See the GNU General Public License for more details.
*
* You should have received a copy of the
* GNU General Public License along with Fabric3.
* If not, see .
*/
package org.fabric3.introspection.xml.definitions;

import javax.xml.namespace.QName;
import javax.xml.stream.Location;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.XMLStreamReader;
import java.net.URI;
import java.util.Set;

import org.fabric3.model.type.definitions.ExternalAttachment;
import org.fabric3.spi.introspection.IntrospectionContext;
import org.fabric3.spi.introspection.xml.AbstractValidatingTypeLoader;
import org.fabric3.spi.introspection.xml.InvalidPrefixException;
import org.fabric3.spi.introspection.xml.InvalidQNamePrefix;
import org.fabric3.spi.introspection.xml.LoaderHelper;
import org.fabric3.spi.introspection.xml.LoaderUtil;
import org.fabric3.spi.introspection.xml.MissingAttribute;
import org.oasisopen.sca.annotation.EagerInit;
import org.oasisopen.sca.annotation.Reference;

/**
 * Loader for the externalAttachment element.
 */
@EagerInit
public class ExternalAttachmentLoader extends AbstractValidatingTypeLoader {

    private final LoaderHelper helper;

    public ExternalAttachmentLoader(@Reference LoaderHelper helper) {
        this.helper = helper;
        addAttributes("intents", "policySets", "attachTo");
    }

    public ExternalAttachment load(XMLStreamReader reader, IntrospectionContext context) throws XMLStreamException {
        Location startLocation = reader.getLocation();

        try {
            Set intents = helper.parseListOfQNames(reader, "intents");
            Set policySets = helper.parseListOfQNames(reader, "policySets");
            String attachTo = reader.getAttributeValue(null, "attachTo");
            if (attachTo == null) {
                context.addError(new MissingAttribute("Attribute attachTo must be specified", startLocation));
                attachTo = "";
            }
            ExternalAttachment attachment = new ExternalAttachment(attachTo, policySets, intents);
            validateAttributes(reader, context, attachment);
            LoaderUtil.skipToEndElement(reader);
            return attachment;
        } catch (InvalidPrefixException e) {
            String prefix = e.getPrefix();
            URI uri = context.getContributionUri();
            InvalidQNamePrefix failure = new InvalidQNamePrefix(
                    "The prefix " + prefix + " specified in the definitions.xml file in contribution " + uri + " is invalid", startLocation);
            context.addError(failure);
        }
        return null;

    }

}