com.sun.mail.handlers.text_xml Maven / Gradle / Ivy
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package com.sun.mail.handlers;
import java.awt.datatransfer.DataFlavor;
import java.io.IOException;
import java.io.OutputStream;
import javax.activation.ActivationDataFlavor;
import javax.activation.DataContentHandler;
import javax.activation.DataSource;
import javax.mail.internet.ContentType;
import javax.mail.internet.ParseException;
import javax.xml.transform.Source;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.TransformerException;
import javax.xml.transform.stream.StreamResult;
import javax.xml.transform.stream.StreamSource;
/**
* DataContentHandler for text/xml.
*
* @author Anil Vijendran
* @author Bill Shannon
*/
public class text_xml extends text_plain {
private final DataFlavor[] flavors;
public text_xml() {
flavors = new DataFlavor[] {
new ActivationDataFlavor(String.class, "text/xml", "XML String"),
new ActivationDataFlavor(String.class, "application/xml",
"XML String"),
new ActivationDataFlavor(StreamSource.class, "text/xml", "XML"),
new ActivationDataFlavor(StreamSource.class, "application/xml",
"XML")
};
}
/**
* Return the DataFlavors for this DataContentHandler.
*
* @return the DataFlavors
*/
public DataFlavor[] getTransferDataFlavors() { // throws Exception;
return (DataFlavor[])flavors.clone();
}
/**
* Return the Transfer Data of type DataFlavor from InputStream.
*
* @param df the DataFlavor
* @param ds the InputStream corresponding to the data
* @return the constructed Object
*/
public Object getTransferData(DataFlavor df, DataSource ds)
throws IOException {
for (int i = 0; i < flavors.length; i++) {
DataFlavor aFlavor = flavors[i];
if (aFlavor.equals(df)) {
if (aFlavor.getRepresentationClass() == String.class)
return super.getContent(ds);
else if (aFlavor.getRepresentationClass() == StreamSource.class)
return new StreamSource(ds.getInputStream());
else
return null; // XXX - should never happen
}
}
return null;
}
/**
*/
public void writeTo(Object obj, String mimeType, OutputStream os)
throws IOException {
if (!isXmlType(mimeType))
throw new IOException(
"Invalid content type \"" + mimeType + "\" for text/xml DCH");
if (obj instanceof String) {
super.writeTo(obj, mimeType, os);
return;
}
if (!(obj instanceof DataSource || obj instanceof Source)) {
throw new IOException("Invalid Object type = "+obj.getClass()+
". XmlDCH can only convert DataSource or Source to XML.");
}
try {
Transformer transformer =
TransformerFactory.newInstance().newTransformer();
StreamResult result = new StreamResult(os);
if (obj instanceof DataSource) {
// Streaming transform applies only to
// javax.xml.transform.StreamSource
transformer.transform(
new StreamSource(((DataSource)obj).getInputStream()),
result);
} else {
transformer.transform((Source)obj, result);
}
} catch (TransformerException ex) {
IOException ioex = new IOException(
"Unable to run the JAXP transformer on a stream "
+ ex.getMessage());
ioex.initCause(ex);
throw ioex;
} catch (RuntimeException ex) {
IOException ioex = new IOException(
"Unable to run the JAXP transformer on a stream "
+ ex.getMessage());
ioex.initCause(ex);
throw ioex;
}
}
private boolean isXmlType(String type) {
try {
ContentType ct = new ContentType(type);
return ct.getSubType().equals("xml") &&
(ct.getPrimaryType().equals("text") ||
ct.getPrimaryType().equals("application"));
} catch (ParseException ex) {
return false;
} catch (RuntimeException ex) {
return false;
}
}
}