rossb 01/02/21 15:42:57
Modified: src/org/apache/cocoon/serialization Tag: xml-cocoon2
SVGSerializer.java
Log:
Added support for configuring the Batik transcoders. It's messy but works -
all are welcome to cut it down in size! :-)
Revision Changes Path
No revision
No revision
1.1.2.25 +84 -19
xml-cocoon/src/org/apache/cocoon/serialization/Attic/SVGSerializer.java
Index: SVGSerializer.java
===================================================================
RCS file:
/home/cvs/xml-cocoon/src/org/apache/cocoon/serialization/Attic/SVGSerializer.java,v
retrieving revision 1.1.2.24
retrieving revision 1.1.2.25
diff -u -r1.1.2.24 -r1.1.2.25
--- SVGSerializer.java 2001/02/20 21:06:46 1.1.2.24
+++ SVGSerializer.java 2001/02/21 23:42:54 1.1.2.25
@@ -18,23 +18,20 @@
import java.io.*;
import java.awt.*;
import java.awt.image.*;
+import java.util.Iterator;
import org.xml.sax.*;
import org.xml.sax.ext.*;
import org.w3c.dom.*;
import org.w3c.dom.svg.*;
-
-import org.apache.batik.refimpl.transcoder.*;
import org.apache.batik.transcoder.*;
-import org.apache.batik.refimpl.transcoder.AbstractTranscoder;
-
-import java.io.ByteArrayInputStream;
-import java.io.ByteArrayOutputStream;
+import org.apache.cocoon.util.ClassUtils;
/**
- * A Batik based Serializer for generating PNG/JPG images
+ * A Batik based Serializer for generating PNG/JPEG images
*
* @author <a href="mailto:[EMAIL PROTECTED]">Davanum Srinivas</a>
- * @version CVS $Revision: 1.1.2.24 $ $Date: 2001/02/20 21:06:46 $
+ * @author <a href="mailto:[EMAIL PROTECTED]">Ross Burton</a>
+ * @version CVS $Revision: 1.1.2.25 $ $Date: 2001/02/21 23:42:54 $
*/
public class SVGSerializer extends SVGBuilder implements Composer,
Serializer, Configurable, PoolClient {
@@ -62,22 +59,92 @@
private OutputStream output=null;
/** The current <code>mime-type</code>. */
private String mimetype = null;
+ /** The current <code>Transcoder</code>. */
+ Transcoder transcoder = null;
/**
* Set the <code>OutputStream</code> where the XML should be serialized.
*/
public void setOutputStream(OutputStream out) {
- this.output=new BufferedOutputStream(out);
+ this.output = new BufferedOutputStream(out);
}
-
+
/**
* Set the configurations for this serializer.
*/
public void configure(Configuration conf) throws ConfigurationException {
- this.config = conf;
-
- mimetype = this.config.getAttribute("mime-type");
+ this.mimetype = conf.getAttribute("mime-type");
log.debug("SVGSerializer mime-type:" + mimetype);
+ // TODO: take the mime type and create a transcoder from it
+ // allow the parameter "transcoder" to override it however
+ String transcoderName = null; // TODO: whatever the factory will say
it is
+
+ // Iterate through the parameters, looking for a transcoder reference
+ for (Iterator i = conf.getChildren("parameter"); i.hasNext(); ) {
+ Configuration paramConf = (Configuration)i.next();
+ String name = paramConf.getAttribute("name");
+ if ("transcoder".equals(name)) {
+ transcoderName = paramConf.getAttribute("value");
+ }
+ }
+ // Now try creating this transcoder
+ try {
+ this.transcoder =
(Transcoder)ClassUtils.newInstance(transcoderName);
+ } catch (Exception ex) {
+ log.error("Cannot load class " + transcoderName, ex);
+ throw new ConfigurationException("Cannot load class " +
transcoderName, ex);
+ }
+ // Now run through the other parameters, using them as hints
+ // to the transcoder
+ for (Iterator i = conf.getChildren("parameter"); i.hasNext(); ) {
+ Configuration paramConf = (Configuration)i.next();
+ String name = paramConf.getAttribute("name");
+ // Skip over the parameters we've dealt with. Ensure this
+ // is kept in sync with the above list!
+ if ("transcoder".equals(name)) continue;
+ // Now try and get the hints out
+ try {
+ // Turn it into a key name (assume the current Batik style
continues!
+ name = ("KEY_" + name).toUpperCase();
+ // Use reflection to get a reference to the key object
+ TranscodingHints.Key key = (TranscodingHints.Key)
+ (transcoder.getClass().getField(name).get(transcoder));
+ Object value;
+ String keyType = paramConf.getAttribute("type",
"STRING").toUpperCase();
+ if ("FLOAT".equals(keyType)) {
+ // Can throw an exception.
+ value = new
Float(paramConf.getAttributeAsFloat("value"));
+ } else if ("INTEGER".equals(keyType)) {
+ // Can throw an exception.
+ value = new
Integer(paramConf.getAttributeAsInt("value"));
+ } else if ("BOOLEAN".equals(keyType)) {
+ // Can throw an exception.
+ value = new
Boolean(paramConf.getAttributeAsBoolean("value"));
+ } else if ("COLOR".equals(keyType)) {
+ // Can throw an exception
+ String stringValue = paramConf.getAttribute("value");
+ if (stringValue.startsWith("#")) {
+ stringValue = stringValue.substring(1);
+ }
+ value = new Color(Integer.parseInt(stringValue, 16));
+ } else {
+ // Assume String, and get the value. Allow an empty
string.
+ value = paramConf.getValue("");
+ }
+ // TODO: if (logger.isDebug())
+ log.debug("SVG Serializer: adding hint \"" + name + "\" with
value \"" + value.toString() + "\"");
+ transcoder.addTranscodingHint(key, value);
+ } catch (ClassCastException ex) {
+ // This is only thrown from the String keyType... line
+ throw new ConfigurationException("Specified key (" + name +
") is not a valid Batik Transcoder key.", ex);
+ } catch (ConfigurationException ex) {
+ throw new ConfigurationException("Name or value not
specified.", ex);
+ } catch (IllegalAccessException ex) {
+ throw new ConfigurationException("Cannot access the key for
parameter \"" + name + "\"", ex);
+ } catch (NoSuchFieldException ex) {
+ throw new ConfigurationException("No field available for
parameter \"" + name + "\"", ex);
+ }
+ }
}
/**
@@ -128,14 +195,12 @@
*/
public void notify(Document doc) throws SAXException {
try {
- TranscoderFactory transcoderFactory =
-
ConcreteTranscoderFactory.getTranscoderFactoryImplementation();
- AbstractTranscoder transcoder = (AbstractTranscoder)
- transcoderFactory.createTranscoder(mimetype);
- transcoder.transcodeToStream(doc,this.output);
+ TranscoderInput transInput = new TranscoderInput(doc);
+ TranscoderOutput transOutput = new TranscoderOutput(this.output);
+ transcoder.transcode(transInput, transOutput);
this.output.flush();
} catch (Exception ex) {
- log.warn("SVGSerializer: Exception writing image", ex);
+ log.error("SVGSerializer: Exception writing image", ex);
throw new SAXException("Exception writing image ", ex);
}
}
