AttributeHandler.java

/*****************************************************************************
 * Copyright (c) 2006-2013, Cloudsmith Inc.
 * The code, documentation and other materials contained herein have been
 * licensed under the Eclipse Public License - v 1.0 by the copyright holder
 * listed above, as the Initial Contributor under such license. The text of
 * such license is available at www.eclipse.org.
 *****************************************************************************/
package org.eclipse.buckminster.core.cspec.parser;

import org.eclipse.buckminster.core.common.parser.DocumentationHandler;
import org.eclipse.buckminster.core.cspec.builder.AttributeBuilder;
import org.eclipse.buckminster.core.cspec.builder.CSpecElementBuilder;
import org.eclipse.buckminster.core.cspec.model.Attribute;
import org.eclipse.buckminster.osgi.filter.FilterFactory;
import org.eclipse.buckminster.sax.AbstractHandler;
import org.eclipse.buckminster.sax.ChildHandler;
import org.eclipse.buckminster.sax.ChildPoppedListener;
import org.osgi.framework.InvalidSyntaxException;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.SAXParseException;

/**
 * @author Thomas Hallgren
 */
public abstract class AttributeHandler extends CSpecElementHandler implements ChildPoppedListener {
	private DocumentationHandler documentationHandler;

	public AttributeHandler(AbstractHandler parent) {
		super(parent);
	}

	@Override
	public void childPopped(ChildHandler child) throws SAXException {
		if (child == documentationHandler)
			((AttributeBuilder) getBuilder()).setDocumentation(documentationHandler.createDocumentation());
	}

	@Override
	public ChildHandler createHandler(String uri, String localName, Attributes attrs) throws SAXException {
		ChildHandler ch;
		if (DocumentationHandler.TAG.equals(localName)) {
			if (documentationHandler == null)
				documentationHandler = new DocumentationHandler(this);
			ch = documentationHandler;
		} else
			ch = super.createHandler(uri, localName, attrs);
		return ch;
	}

	@Override
	public void handleAttributes(Attributes attrs) throws SAXException {
		super.handleAttributes(attrs);
		String filterStr = getOptionalStringValue(attrs, Attribute.ATTR_FILTER);
		if (filterStr != null) {
			try {
				getAttributeBuilder().setFilter(FilterFactory.newInstance(filterStr));
			} catch (InvalidSyntaxException e) {
				throw new SAXParseException(e.getMessage(), getDocumentLocator());
			}
		}
	}

	@Override
	protected CSpecElementBuilder createBuilder() {
		return getCSpecBuilder().createAttributeBuilder();
	}
}