PrerequisiteHandler.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.cspec.builder.NamedElementBuilder;
import org.eclipse.buckminster.core.cspec.builder.PrerequisiteBuilder;
import org.eclipse.buckminster.core.cspec.model.CSpec;
import org.eclipse.buckminster.core.cspec.model.NamedElement;
import org.eclipse.buckminster.core.cspec.model.Prerequisite;
import org.eclipse.buckminster.core.version.VersionHelper;
import org.eclipse.buckminster.osgi.filter.FilterFactory;
import org.eclipse.buckminster.sax.AbstractHandler;
import org.eclipse.core.runtime.CoreException;
import org.osgi.framework.InvalidSyntaxException;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.SAXParseException;

/**
 * @author Thomas Hallgren
 */
public class PrerequisiteHandler extends CSpecElementHandler {
	public static final String TAG = Prerequisite.TAG;

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

	@Override
	public void handleAttributes(Attributes attrs) throws SAXException {
		super.handleAttributes(attrs);
		PrerequisiteBuilder builder = (PrerequisiteBuilder) this.getBuilder();
		builder.setComponentName(getOptionalStringValue(attrs, Prerequisite.ATTR_COMPONENT));
		builder.setComponentType(getOptionalStringValue(attrs, Prerequisite.ATTR_COMPONENT_TYPE));
		try {
			builder.setVersionRange(VersionHelper.parseVersionRangeAttributes(attrs));
		} catch (CoreException e) {
			throw new SAXParseException(e.getMessage(), this.getDocumentLocator());
		}
		builder.setContributor(getOptionalBooleanValue(attrs, Prerequisite.ATTR_CONTRIBUTOR, true));
		builder.setAlias(getOptionalStringValue(attrs, Prerequisite.ATTR_ALIAS));
		builder.setExcludePattern(getOptionalPatternValue(attrs, Prerequisite.ATTR_EXCLUDE_PATTERN));
		builder.setIncludePattern(getOptionalPatternValue(attrs, Prerequisite.ATTR_INCLUDE_PATTERN));
		String filterStr = getOptionalStringValue(attrs, Prerequisite.ATTR_FILTER);
		if (filterStr != null) {
			try {
				builder.setFilter(FilterFactory.newInstance(filterStr));
			} catch (InvalidSyntaxException e) {
				throw new SAXParseException(e.getMessage(), getDocumentLocator());
			}
		}
	}

	@Override
	protected NamedElementBuilder createBuilder() {
		return getAttributeBuilder().createPrerequisiteBuilder();
	}

	@Override
	protected String getNameAttribute(Attributes attrs) throws SAXException {
		String name = getOptionalStringValue(attrs, NamedElement.ATTR_NAME);
		if (name == null)
			name = CSpec.SELF_ARTIFACT;
		return name;
	}
}