Overview Package Tree Index Deprecated About
Prev Class | Next ClassFrames | No Frames
Summary: Nested | Field | Method | ConstrDetail: Nested | Field | Method | Constr

gnu.xml.util

Class Resolver

Implemented Interfaces:
Cloneable, EntityResolver
public class Resolver
extends java.lang.Object
implements EntityResolver, Cloneable
Utility implementation of a SAX resolver, which can be used to improve network utilization of SAX based XML components. It does this by supporting local caches of external entities. SAX parsers should use such local caches when possible.

See Also:
XCat

Constructor Summary

Resolver(Dictionary dict)
Constructs a resolver which understands how to map PUBLIC identifiers to other URIs, typically for local copies of standard DTD components.

Method Summary

static void
addDirectoryMapping(Dictionary table, mappings[][] , File directory)
Updates a dictionary used to map PUBLIC identifiers to file names, so that it uses the mappings in a specified directory.
static String
fileNameToURL(String filename)
Provides the URL for a named file, without relying on the JDK 1.2 File.toURL() utility method.
static String
fileToURL(File f)
Provides the URL for a file, without relying on the JDK 1.2 File.toURL() utility method.
static String
getEncoding(String contentType)
This parses most MIME content type strings that have charset=... encoding declarations to and returns the specified encoding.
static String
getURL(String fileOrURL)
Returns a URL string.
InputSource
resolveEntity(String publicId, String systemId)
Uses a local dictionary of public identifiers to resolve URIs, normally with the goal of minimizing network traffic or latencies.

Constructor Details

Resolver

public Resolver(Dictionary dict)
Constructs a resolver which understands how to map PUBLIC identifiers to other URIs, typically for local copies of standard DTD components.

Parameters:

Method Details

addDirectoryMapping

public static void addDirectoryMapping(Dictionary table,
                                       mappings[][] ,
                                       File directory)
            throws IOException
Updates a dictionary used to map PUBLIC identifiers to file names, so that it uses the mappings in a specified directory.

Parameters:
directory - File holding the specified files.

fileNameToURL

public static String fileNameToURL(String filename)
            throws IOException
Provides the URL for a named file, without relying on the JDK 1.2 File.toURL() utility method.

Parameters:
filename - the file name to convert. Relative file names are resolved the way the JVM resolves them (current to the process-global current working directory).

fileToURL

public static String fileToURL(File f)
            throws IOException
Provides the URL for a file, without relying on the JDK 1.2 File.toURL() utility method.

Parameters:
f - the file to convert. Relative file names are resolved the way the JVM resolves them (current to the process-global current working directory).

getEncoding

public static String getEncoding(String contentType)
This parses most MIME content type strings that have charset=... encoding declarations to and returns the specified encoding. This conforms to RFC 3023, and is useful when constructing InputSource objects from URLConnection objects or other objects using MIME content typing.

Parameters:
contentType - the MIME content type that will be parsed; must not be null.

Returns:
the appropriate encoding, or null if the content type is not text and there's no charset=... attribute

getURL

public static String getURL(String fileOrURL)
Returns a URL string. Note that if a malformed URL is provided, or the parameter names a nonexistent file, the resulting URL may be malformed.

Parameters:
fileOrURL - If this is the name of a file which exists, then its URL is returned. Otherwise the argument is returned.

resolveEntity

public InputSource resolveEntity(String publicId,
                                 String systemId)
            throws IOException,
                   SAXException
Uses a local dictionary of public identifiers to resolve URIs, normally with the goal of minimizing network traffic or latencies.
Specified by:
resolveEntity in interface EntityResolver

Overview Package Tree Index Deprecated About