vgritsenko 2002/10/22 20:39:15
Modified: src/java/org/apache/cocoon/xml Tag: cocoon_2_0_3_branch
XMLUtils.java
Log:
Add xsp:expr stuff to the XMLUtil (backported from 2.1)
Revision Changes Path
No revision
No revision
1.6.2.2 +133 -4 xml-cocoon2/src/java/org/apache/cocoon/xml/XMLUtils.java
Index: XMLUtils.java
===================================================================
RCS file: /home/cvs/xml-cocoon2/src/java/org/apache/cocoon/xml/XMLUtils.java,v
retrieving revision 1.6.2.1
retrieving revision 1.6.2.2
diff -u -r1.6.2.1 -r1.6.2.2
--- XMLUtils.java 11 Oct 2002 06:30:41 -0000 1.6.2.1
+++ XMLUtils.java 23 Oct 2002 03:39:15 -0000 1.6.2.2
@@ -53,21 +53,22 @@
import java.io.StringWriter;
import java.util.ArrayList;
import java.util.Properties;
+import java.util.Collection;
+import java.util.Iterator;
-import org.w3c.dom.Attr;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NamedNodeMap;
-import org.w3c.dom.NodeList;
import org.xml.sax.ContentHandler;
+import org.xml.sax.SAXException;
import org.xml.sax.ext.LexicalHandler;
import org.apache.cocoon.ProcessingException;
+import org.apache.cocoon.xml.dom.DOMStreamer;
import javax.xml.transform.Transformer;
-import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.OutputKeys;
import javax.xml.transform.dom.DOMSource;
@@ -244,4 +245,132 @@
}
}
+ /**
+ * Add string data
+ *
+ * @param contentHandler The SAX content handler
+ * @param data The string data
+ */
+ public static void data(ContentHandler contentHandler,
+ String data)
+ throws SAXException {
+ contentHandler.characters(data.toCharArray(), 0, data.length());
+ }
+
+ /**
+ * Implementation of <xsp:expr> for <code>String</code> :
+ * outputs characters representing the value.
+ *
+ * @param contentHandler the SAX content handler
+ * @param text the value
+ */
+ public static void valueOf(ContentHandler contentHandler, String text)
+ throws SAXException {
+ if (text != null) {
+ data(contentHandler, text);
+ }
+ }
+
+ /**
+ * Implementation of <xsp:expr> for <code>XMLizable</code> :
+ * outputs the value by calling <code>v.toSax(contentHandler)</code>.
+ *
+ * @param contentHandler the SAX content handler
+ * @param v the XML fragment
+ */
+ public static void valueOf(ContentHandler contentHandler, XMLizable v)
+ throws SAXException {
+ if (v != null) {
+ try {
+ v.toSAX(contentHandler);
+ } catch(ProcessingException e) {
+ throw new SAXException(e);
+ }
+ }
+ }
+
+ /**
+ * Implementation of <xsp:expr> for <code>org.w3c.dom.Node</code> :
+ * converts the Node to a SAX event stream.
+ *
+ * @param contentHandler the SAX content handler
+ * @param v the value
+ */
+ public static void valueOf(ContentHandler contentHandler, Node v)
+ throws SAXException {
+ if (v != null) {
+ DOMStreamer streamer = new DOMStreamer(contentHandler);
+ streamer.stream(v);
+ }
+ }
+
+ /**
+ * Implementation of <xsp:expr> for <code>java.util.Collection</code> :
+ * outputs the value by calling <code>xspExpr()</code> on each element of the
+ * collection.
+ *
+ * @param contentHandler the SAX content handler
+ * @param v the XML fragment
+ */
+ public static void valueOf(ContentHandler contentHandler,
+ Collection v)
+ throws SAXException {
+ if (v != null) {
+ Iterator iterator = v.iterator();
+ while (iterator.hasNext()) {
+ valueOf(contentHandler, iterator.next());
+ }
+ }
+ }
+
+ /**
+ * Implementation of <xsp:expr> for <code>Object</code> depending on its
class :
+ * <ul>
+ * <li>if it's an array, call <code>xspExpr()</code> on all its elements,</li>
+ * <li>if it's class has a specific <code>xspExpr()</code>implementation, use
it,</li>
+ * <li>else, output it's string representation.</li>
+ * </ul>
+ *
+ * @param contentHandler the SAX content handler
+ * @param v the value
+ */
+ public static void valueOf(ContentHandler contentHandler, Object v)
+ throws SAXException {
+ if (v == null) {
+ return;
+ }
+
+ // Array: recurse over each element
+ if (v.getClass().isArray()) {
+ Object[] elements = (Object[]) v;
+
+ for (int i = 0; i < elements.length; i++) {
+ valueOf(contentHandler, elements[i]);
+ }
+ return;
+ }
+
+ // Check handled object types in case they were not typed in the XSP
+
+ // XMLizable
+ if (v instanceof XMLizable) {
+ valueOf(contentHandler, (XMLizable)v);
+ return;
+ }
+
+ // Node
+ if (v instanceof Node) {
+ valueOf(contentHandler, (Node)v);
+ return;
+ }
+
+ // Collection
+ if (v instanceof Collection) {
+ valueOf(contentHandler, (Collection)v);
+ return;
+ }
+
+ // Give up: hope it's a string or has a meaningful string representation
+ data(contentHandler, String.valueOf(v));
+ }
}
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