/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.isis.core.runtime.snapshot;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
/**
* Stateless utility methods for manipulating XML documents.
*/
public final class Helper {
/**
* Helper method
*/
String trailingSlash(final String str) {
return str.endsWith("/") ? str : str + "/";
}
/**
* Utility method that returns just the class's name for the supplied fully
* qualified class name.
*
* cf 'basename' in Unix.
*/
String classNameFor(final String fullyQualifiedClassName) {
final int fullNameLastPeriodIdx = fullyQualifiedClassName.lastIndexOf('.');
if (fullNameLastPeriodIdx > 0 && fullNameLastPeriodIdx < fullyQualifiedClassName.length()) {
return fullyQualifiedClassName.substring(fullNameLastPeriodIdx + 1);
} else {
return fullyQualifiedClassName;
}
}
/**
* Utility method that returns the package name for the supplied fully
* qualified class name, or <code>default</code> if the class is in no
* namespace / in the default namespace.
*
* cf 'dirname' in Unix.
*/
String packageNameFor(final String fullyQualifiedClassName) {
final int fullNameLastPeriodIdx = fullyQualifiedClassName.lastIndexOf('.');
if (fullNameLastPeriodIdx > 0) {
return fullyQualifiedClassName.substring(0, fullNameLastPeriodIdx);
} else {
return "default"; // TODO: should provide a better way to specify
// namespace.
}
}
/**
* Returns the root element for the element by looking up the owner document
* for the element, and from that its document element.
*
* If no document element exists, just returns the supplied document.
*/
Element rootElementFor(final Element element) {
final Document doc = element.getOwnerDocument();
if (doc == null) {
return element;
}
final Element rootElement = doc.getDocumentElement();
if (rootElement == null) {
return element;
}
return rootElement;
}
Document docFor(final Element element) {
return element.getOwnerDocument();
}
}