GroupHandler.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.GroupBuilder;
import org.eclipse.buckminster.core.cspec.builder.PrerequisiteBuilder;
import org.eclipse.buckminster.core.cspec.builder.TopLevelAttributeBuilder;
import org.eclipse.buckminster.core.cspec.model.Group;
import org.eclipse.buckminster.core.cspec.model.PrerequisiteAlreadyDefinedException;
import org.eclipse.buckminster.sax.AbstractHandler;
import org.eclipse.buckminster.sax.ChildHandler;
import org.eclipse.buckminster.sax.ChildPoppedListener;
import org.eclipse.core.runtime.Path;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.SAXParseException;

/**
 * @author Thomas Hallgren
 */
public class GroupHandler extends TopLevelAttributeHandler implements ChildPoppedListener {
	private final PrerequisiteHandler prerequisiteHandler = new PrerequisiteHandler(this);

	public GroupHandler(AbstractHandler parent, boolean publ) {
		super(parent, publ);
	}

	@Override
	public void childPopped(ChildHandler child) throws SAXException {
		if (child == prerequisiteHandler) {
			try {
				((GroupBuilder) this.getBuilder()).addPrerequisite((PrerequisiteBuilder) prerequisiteHandler.getBuilder());
			} catch (PrerequisiteAlreadyDefinedException e) {
				throw new SAXParseException(e.getMessage(), this.getDocumentLocator());
			}
		} else
			super.childPopped(child);
	}

	@Override
	public ChildHandler createHandler(String uri, String localName, Attributes attrs) throws SAXException {
		ChildHandler ch;
		if (PrerequisiteHandler.TAG.equals(localName))
			ch = prerequisiteHandler;
		else
			ch = super.createHandler(uri, localName, attrs);
		return ch;
	}

	@Override
	public void handleAttributes(Attributes attrs) throws SAXException {
		super.handleAttributes(attrs);
		String tmp = getOptionalStringValue(attrs, Group.ATTR_REBASE);
		if (tmp != null)
			this.getGroupBuilder().setPrerequisiteRebase(Path.fromPortableString(tmp));
	}

	@Override
	protected TopLevelAttributeBuilder createAttributeBuilder() {
		return this.getCSpecBuilder().createGroupBuilder();
	}

	final GroupBuilder getGroupBuilder() {
		return (GroupBuilder) this.getBuilder();
	}
}