Can you create a minimal but fully working project with maven? I.e. we'd
need code with main, and a pom. I mention this because an additional lib
is needed, unless I misunderstood.
Tilman
Am 09.03.2017 um 16:51 schrieb Thad Humphries:
Here's my code. As I said, it is throwing an exception at "new
DomXmpParser()" and I have no idea why:
protected JSONObject getPdfMetadata(byte [] buffer)
throws IOException, XmpParsingException, JSONException {
ByteArrayInputStream bais = new ByteArrayInputStream(buffer);
JSONObject json = new JSONObject();
PDDocument document = null;
try {
document = PDDocument.load(bais);
PDDocumentCatalog catalog = document.getDocumentCatalog();
PDMetadata meta = catalog.getMetadata();
if (meta != null) {
DomXmpParser xmpParser = new DomXmpParser(); // throws exception
XMPMetadata metadata = xmpParser.parse(meta.createInputStream());
DublinCoreSchema dc = metadata.getDublinCoreSchema();
if (dc != null) {
JSONObject dcj = new JSONObject();
dcj.put("Title", dc.getTitle());
dcj.put("Description", dc.getDescription());
...
json.put("Dublin", dcj);
}
...
My goal is to return a JSON formatted string to a browser, and display the
fomatted metadata to the user. So for now I'm getting around this
DomXmpParser exception from DomXmpParser by simply converting the metadata
to JSON with JSON-java (https://github.com/stleary/JSON-java), and
untangling the namespace, etc. on browser side:
PDMetadata meta = catalog.getMetadata();
if (meta != null) {
InputStream is = meta.exportXMPMetadata();
ByteArrayOutputStream baos = new ByteArrayOutputStream();
int read = 0;
byte [] bytes = new byte[8*1024];
while ((read = is.read(bytes)) != -1) {
baos.write(bytes, 0, read);
}
String string = new String(baos.toByteArray());
json = XML.toJSONObject(string);
...
On Wed, Mar 8, 2017 at 10:11 PM, Thad Humphries <[email protected]>
wrote:
When I run the org.apache.pdfbox.examples.pdmodel.ExtractMetadata
example, it works. However when I put the same code into my class, it
throws an exception when I call "DomXmpParser xmpParser = new
DomXmpParser();" The trace is:
java.lang.AbstractMethodError: javax.xml.parsers.DocumentBuilderFactory.
setFeature(Ljava/lang/String;Z)V
at org.apache.xmpbox.xml.DomXmpParser.<init>(DomXmpParser.java:81)
at com.jthad.util.image.MetadataExtractor.getPdfMetadata(
MetadataExtractor.java:170)
at com. jthad.util.image.TestMetadataExtractor.testPdf0(
TestMetadataExtractor.java:41)
...
Line 81 in DomXmpParser.java is
dbFactory.setFeature("http://apache.org/xml/features/disallow-doctype-decl";,
true);
I am at a loss to understand how "new DomXmpParser()" works from the
command line but fails when called by a JUnit test in Eclipse.
--
"Hell hath no limits, nor is circumscrib'd In one self-place; but where we
are is hell, And where hell is, there must we ever be" --Christopher
Marlowe, *Doctor Faustus* (v. 121-24)
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
