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Refactored QNameUtils.getQNameForSource() into separate helper class to fix code tangle.

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This commit is contained in:
Arjen Poutsma
2007-05-12 20:53:35 +00:00
parent 5c32714869
commit 022c271db9
8 changed files with 100 additions and 124 deletions
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48
xml/src/main/java/org/springframework/xml/namespace/QNameUtils.java
View File

@@ -17,19 +17,9 @@
package org.springframework.xml.namespace;
import javax.xml.namespace.QName;
import javax.xml.stream.XMLStreamConstants;
import javax.xml.stream.XMLStreamReader;
import javax.xml.transform.Source;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMResult;
import javax.xml.transform.dom.DOMSource;
import org.springframework.util.Assert;
import org.springframework.util.StringUtils;
import org.springframework.xml.transform.StaxSource;
import org.w3c.dom.Document;
import org.w3c.dom.Node;
/**
@@ -128,44 +118,6 @@ public abstract class QNameUtils {
}
}
/**
* Returns the root qualified name of the given source, transforming it if necessary.
*
* @param source the source to get the root element from
* @param transformerFactory a transformer factory, necessary if the given source is not a <code>DOMSource</code>
* @return the root element
*/
public static QName getQNameForSource(Source source, TransformerFactory transformerFactory)
throws TransformerException {
if (source instanceof DOMSource) {
DOMSource domSource = (DOMSource) source;
Node node = domSource.getNode();
if (node.getNodeType() == Node.ELEMENT_NODE) {
return getQNameForNode(node);
}
else if (node.getNodeType() == Node.DOCUMENT_NODE) {
Document document = (Document) node;
return getQNameForNode(document.getDocumentElement());
}
}
else if (source instanceof StaxSource) {
StaxSource staxSource = (StaxSource) source;
if (staxSource.getXMLStreamReader() != null) {
XMLStreamReader streamReader = staxSource.getXMLStreamReader();
if (streamReader.getEventType() == XMLStreamConstants.START_ELEMENT ||
streamReader.getEventType() == XMLStreamConstants.END_ELEMENT) {
return streamReader.getName();
}
}
}
// we have no other option than to transform
Transformer transformer = transformerFactory.newTransformer();
DOMResult domResult = new DOMResult();
transformer.transform(source, domResult);
Document document = (Document) domResult.getNode();
return getQNameForNode(document.getDocumentElement());
}
/**
* Convert a <code>QName</code> to a qualified name, as used by DOM and SAX. The returned string has a format of
* <code>prefix:localName</code> if the prefix is set, or just <code>localName</code> if not.

59
xml/src/test/java/org/springframework/xml/namespace/QNameUtilsTest.java
View File

@@ -16,25 +16,14 @@
package org.springframework.xml.namespace;
import java.io.StringReader;
import javax.xml.namespace.QName;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.stream.XMLInputFactory;
import javax.xml.stream.XMLStreamConstants;
import javax.xml.stream.XMLStreamReader;
import javax.xml.transform.Source;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.sax.SAXSource;
import javax.xml.transform.stream.StreamSource;
import junit.framework.TestCase;
import org.springframework.util.StringUtils;
import org.springframework.xml.transform.StaxSource;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.xml.sax.InputSource;
public class QNameUtilsTest extends TestCase {
@@ -113,53 +102,5 @@ public class QNameUtilsTest extends TestCase {
assertEquals("invalid localname", "localName", result.getLocalPart());
}
public void testGetQNameForDomSource() throws Exception {
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
DocumentBuilder builder = factory.newDocumentBuilder();
Document document = builder.newDocument();
Element element = document.createElementNS("namespace", "prefix:localname");
document.appendChild(element);
Source source = new DOMSource(document);
QName qName = QNameUtils.getQNameForSource(source, TransformerFactory.newInstance());
assertNotNull("getQNameForNode returns null", qName);
assertEquals("QName has invalid localname", "localname", qName.getLocalPart());
assertEquals("Qname has invalid namespace", "namespace", qName.getNamespaceURI());
assertEquals("Qname has invalid prefix", "prefix", qName.getPrefix());
}
public void testGetQNameForStaxSource() throws Exception {
String contents = "<prefix:localname xmlns:prefix='namespace'/>";
XMLInputFactory inputFactory = XMLInputFactory.newInstance();
XMLStreamReader streamReader = inputFactory.createXMLStreamReader(new StringReader(contents));
while (streamReader.getEventType() != XMLStreamConstants.START_ELEMENT) {
streamReader.next();
}
Source source = new StaxSource(streamReader);
QName qName = QNameUtils.getQNameForSource(source, TransformerFactory.newInstance());
assertNotNull("getQNameForNode returns null", qName);
assertEquals("QName has invalid localname", "localname", qName.getLocalPart());
assertEquals("Qname has invalid namespace", "namespace", qName.getNamespaceURI());
assertEquals("Qname has invalid prefix", "prefix", qName.getPrefix());
}
public void testGetQNameForStreamSource() throws Exception {
String contents = "<prefix:localname xmlns:prefix='namespace'/>";
Source source = new StreamSource(new StringReader(contents));
QName qName = QNameUtils.getQNameForSource(source, TransformerFactory.newInstance());
assertNotNull("getQNameForNode returns null", qName);
assertEquals("QName has invalid localname", "localname", qName.getLocalPart());
assertEquals("Qname has invalid namespace", "namespace", qName.getNamespaceURI());
assertEquals("Qname has invalid prefix", "prefix", qName.getPrefix());
}
public void testGetQNameForSaxSource() throws Exception {
String contents = "<prefix:localname xmlns:prefix='namespace'/>";
Source source = new SAXSource(new InputSource(new StringReader(contents)));
QName qName = QNameUtils.getQNameForSource(source, TransformerFactory.newInstance());
assertNotNull("getQNameForNode returns null", qName);
assertEquals("QName has invalid localname", "localname", qName.getLocalPart());
assertEquals("Qname has invalid namespace", "namespace", qName.getNamespaceURI());
assertEquals("Qname has invalid prefix", "prefix", qName.getPrefix());
}
}