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/*******************************************************************************
* Copyright (c) 2006 IBM Corporation.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.equinox.ds.parser;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.DefaultHandler;
/**
* Base class for element handlers to provide some common behavior.
*
*/
abstract class ElementHandler extends DefaultHandler {
protected ParserHandler root;
/**
* Return the name of the handled element.
*
* @return The name of the handled element.
*/
protected abstract String getElementName();
protected boolean isSCRNamespace(String uri) {
return (uri.length() == 0) || uri.equals(ParserConstants.SCR_NAMESPACE);
}
protected void processAttributes(Attributes attributes) {
int size = attributes.getLength();
for (int i = 0; i < size; i++) {
if (isSCRNamespace(attributes.getURI(i))) {
handleAttribute(attributes.getLocalName(i), attributes.getValue(i));
}
}
}
protected abstract void handleAttribute(String name, String value);
public void startElement(String uri, String localName, String qName, Attributes attributes) throws SAXException {
if (isSCRNamespace(uri)) {
root.logError("unrecognized element "+ qName);
}
root.setHandler(new IgnoredElement(root, this));
}
public void characters(char[] ch, int start, int length) {
int end = start + length;
for (int i = start; i < end; i++) {
if (!Character.isWhitespace(ch[i])) {
root.logError(getElementName()+ " element body must be empty");
}
}
}
}
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