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java.lang.Objectdiva.util.LoggableOp
diva.compat.xml.XmlReader
public class XmlReader
An XmlReader reads a character stream and constructs the internal data of an XmlDocument. Internally, it contains an implementation of the Aelfred XmlHandler interface to parse the character stream and construct a tree of XmlElements.
Typically, when you parse an XML document, you do not want the parse to barf on badly-formed XML with an exception. XmlReader therefore prints error and warning messages to an output stream, which is by default System.out, but can be set to another stream to allow an application to capture this output (to display it in a GUI, for example). A "verbose" flag can be used to make the XML reader print out lots and lots of other information as well. Once the parse is complete, the caller should use the getErrorCount() method to see if there were any errors.
This parser is capable of resolving external entities using either public IDs or system IDs. System IDs are usually given as a complete URL to the given file. Public IDs are given as partial pathnames to which the parser prepends a locally known location for libraries of XML files. In Diva, the partial pathname (eg "graph.dtd") is looked up in the default resource bundle in the diva.resource package. DTDs that can be recognized as "public" must therefore be entered into diva/resource/Defaults.properties file. If both IDs are given, this parser tries to use the public ID first.
Nested Class Summary | |
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class |
XmlReader.Handler
Handler is an inner class that implements the Aelfred XmlHandler interface. |
Field Summary |
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Fields inherited from class diva.util.LoggableOp |
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_verbose |
Constructor Summary | |
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XmlReader()
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Method Summary | |
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int |
getLineNumber()
Get the current line number. |
void |
parse(XmlDocument document)
Parse the given document from the URL it contains. |
void |
parse(XmlDocument document,
InputStream in)
Parse the given document from the given input stream, but using the given URL to resolve external references. |
void |
parse(XmlDocument document,
Reader in)
Parse the given document from the given reader, but using the given URL to resolve external references. |
String |
printEntityType(String name)
Print the type of an entity. |
Methods inherited from class diva.util.LoggableOp |
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getErrorCount, getErrorStream, getWarningCount, indent, isVerbose, logError, logError, logError, logInfo, logInfo, logWarning, logWarning, logWarning, reset, setErrorStream, setVerbose, unindent |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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public XmlReader()
Method Detail |
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public int getLineNumber()
getLineNumber
in class LoggableOp
public void parse(XmlDocument document) throws Exception
Exception
- If the parser fails internally. This indicates
a severe error, such as an I/O error, not an XML error.public void parse(XmlDocument document, InputStream in) throws Exception
Exception
- If the parser fails internally. This indicates
a severe error, such as an I/O error, not an XML error.parse(XmlDocument)
public void parse(XmlDocument document, Reader in) throws Exception
Exception
- If the parser fails internally. This indicates
a severe error, such as an I/O error, not an XML error.parse(XmlDocument)
public String printEntityType(String name)
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