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From jonathan wood <jonathanshaww...@gmail.com>
Subject Re: org.xml.sax.SAXParseException: Invalid encoding name "HP-ROMAN8"
Date Wed, 30 Nov 2011 18:07:27 GMT
Saw this today and thought I'd drop it here for reference ... a java5
solution to programmatic lookup:

"This class handles looking up service providers on the class path. It
implements the Service Provider section of the JAR File
Specification<http://java.sun.com/javase/6/docs/technotes/guides/jar/jar.html#Service%20Provider>
.

The Service Provider programmatic lookup was not specified prior to Java 6
so this interface allows use of the specification prior to Java 6."
http://docs.jboss.org/seam/3/solder/latest/api/org/jboss/solder/util/service/ServiceLoader.html



On Fri, Nov 25, 2011 at 3:12 AM, jonathan wood
<jonathanshawwood@gmail.com>wrote:

> Note that the linked second form of newInstance(...) seems to bo 1.6
> specific
>
>
> On Fri, Nov 25, 2011 at 3:06 AM, jonathan wood <jonathanshawwood@gmail.com
> > wrote:
>
>>
>> I believe you are experiencing a ServiceLoader in your xerces jar file.
>>  You can test this by looking for the file
>> /META-INF/services/javax.xml.parsers.SAXParserFactory.  If it exists, you
>> have a few choices....
>>
>> Brute force...remove the file from the xerces jar and repackage (relies
>> on classpath and a one-off jar...not a good solution).
>>
>> You can manipulate the load of the "service" implementation by iterating
>> over the options...
>>
>>         ServiceLoader<SAXParserFactory> serviceLoader =
>> ServiceLoader.load(SAXParserFactory.class);
>>         serviceLoader.iterator();
>>         for (SAXParserFactory spf : serviceLoader) {
>>               // spf.???
>>         }
>>
>> Directly load the impl you want ...   SAXParserFactory.html#newInstance(java.lang.String,
>> java.lang.ClassLoader)<http://docs.oracle.com/javase/6/docs/api/javax/xml/parsers/SAXParserFactory.html#newInstance(java.lang.String,%20java.lang.ClassLoader)>
>>
>>
>> I'd advise reading the javadoc for both forms of newInstance
>>
>>
>> Hope this helps
>>
>>
>>
>> On Thu, Nov 24, 2011 at 5:05 AM, Alex Geller <ag@4js.com> wrote:
>>
>>> Hi,
>>> I am not sure if this is a Batik only issue but since I encountered it
>>> using
>>> Batik I will share the problem and the solution I have found so far.
>>>
>>> Description of the problem:
>>> If you have a program that reads XML files and you add
>>> "xerces_2_5_0.jar" to
>>> your CLASSPATH on a HP-UX machine (or any other machine that has
>>> proprietary
>>> XML encodings) then the program may fail with the exception
>>> "org.xml.sax.SAXParseException: Invalid encoding name "HP-ROMAN8"".
>>>
>>> Note that the existence of this jar in the CLASSPATH is sufficient to
>>> make
>>> this happen. The following test program illustrates the issue (forgive
>>> the
>>> deprecation warning):
>>>
>>> import org.xml.sax.InputSource;
>>> import javax.xml.parsers.SAXParserFactory;
>>> import java.io.StringBufferInputStream;
>>> public class EncodingTest
>>> {
>>>    public static void main(String[] args) throws Exception
>>>    {
>>>
>>> SAXParserFactory.newInstance().newSAXParser().getXMLReader().parse(new
>>> InputSource(new StringBufferInputStream("<?xml version=\"1.0\"
>>> encoding=\"HP-ROMAN8\"?> ")));
>>>    }
>>> }
>>>
>>> Consider the following invocations:
>>> Example 1:
>>> $(unset CLASSPATH;java -Djaxp.debug=1 EncodingTest)
>>> JAXP: find factoryId =javax.xml.parsers.SAXParserFactory
>>> JAXP: loaded from fallback value:
>>> com.sun.org.apache.xerces.internal.jaxp.SAXParserFactoryImpl
>>> JAXP: created new instance of class
>>> com.sun.org.apache.xerces.internal.jaxp.SAXParserFactoryImpl using
>>> ClassLoader: null
>>> $
>>>
>>> Example 2:
>>> $(export CLASSPATH=.:$BATIKDIR/batik-1.7/lib/xerces_2_5_0.jar;java
>>> -Djaxp.debug=1 EncodingTest)
>>> JAXP: find factoryId =javax.xml.parsers.SAXParserFactory
>>> JAXP: found jar
>>> resource=META-INF/services/javax.xml.parsers.SAXParserFactory using
>>> ClassLoader: sun.misc.Launcher$AppClassLoader@df6ccd
>>> JAXP: found in resource,
>>> value=org.apache.xerces.jaxp.SAXParserFactoryImpl
>>> JAXP: created new instance of class
>>> org.apache.xerces.jaxp.SAXParserFactoryImpl using ClassLoader:
>>> sun.misc.Launcher$AppClassLoader@df6ccd
>>> [Fatal Error] :1:43: Invalid encoding name "HP-ROMAN8".
>>> Exception in thread "main" org.xml.sax.SAXParseException: Invalid
>>> encoding
>>> name "HP-ROMAN8".
>>>        at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown
>>> Source)
>>>        at EncodingTest.main(EncodingTest.java:9)
>>> $
>>>
>>> Now, the issue can be fixed by forcing the JVM to use the default
>>> factory by
>>> settings the property javax.xml.parsers.SAXParserFactory as described in
>>>
>>> http://docs.oracle.com/javase/6/docs/api/javax/xml/parsers/SAXParserFactory.html#newInstance()
>>> as follows:
>>>
>>> Example 3:
>>>
>>> $(export CLASSPATH=.:$BATIKDIR/batik-1.7/lib/xerces_2_5_0.jar;java
>>>
>>> -Djavax.xml.parsers.SAXParserFactory=com.sun.org.apache.xerces.internal.jaxp.SAXParserFactoryImpl
>>> -Djaxp.debug=1 EncodingTest)
>>> JAXP: find factoryId =javax.xml.parsers.SAXParserFactory
>>> JAXP: found system property,
>>> value=com.sun.org.apache.xerces.internal.jaxp.SAXParserFactoryImpl
>>> JAXP: created new instance of class
>>> com.sun.org.apache.xerces.internal.jaxp.SAXParserFactoryImpl using
>>> ClassLoader: null
>>> $
>>>
>>> Questions:
>>> 1) Is it necessary to include xerces_2_5_0.jar in the CLASSPATH?
>>> 2) If yes, how can I load documents with local encodings and use Batik at
>>> the same time.
>>>
>>> Thanks,
>>> Alex
>>>
>>> ~
>>>
>>> --
>>> View this message in context:
>>> http://batik.2283329.n4.nabble.com/org-xml-sax-SAXParseException-Invalid-encoding-name-HP-ROMAN8-tp4103307p4103307.html
>>> Sent from the Batik - Users mailing list archive at Nabble.com.
>>>
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>>>
>>
>

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