org.apache.tools.ant.types.resolver
Class ApacheCatalog

java.lang.Object
  |
  +--org.apache.xml.resolver.Catalog
        |
        +--org.apache.tools.ant.types.resolver.ApacheCatalog

public class ApacheCatalog
extends org.apache.xml.resolver.Catalog

This class extends the Catalog class provided by Norman Walsh's resolver library in xml-commons in order to add classpath entity and URI resolution. Since XMLCatalog already does classpath resolution, we simply add all CatalogEntry instances back to the controlling XMLCatalog instance. This is done via a callback mechanism. ApacheCatalog is only used for external catalog files. Inline entries (currently <dtd> and <entity>) are not added to ApacheCatalog. See XMLCatalog.java for the details of the entity and URI resolution algorithms.

Since:
Ant 1.6
See Also:
XMLCatalog.CatalogResolver

Field Summary
 
Fields inherited from class org.apache.xml.resolver.Catalog
base, BASE, CATALOG, catalogCwd, catalogEntries, catalogFiles, catalogManager, catalogs, default_override, DELEGATE_PUBLIC, DELEGATE_SYSTEM, DELEGATE_URI, DOCTYPE, DOCUMENT, DTDDECL, ENTITY, LINKTYPE, localCatalogFiles, localDelegate, NOTATION, OVERRIDE, PUBLIC, readerArr, readerMap, REWRITE_SYSTEM, REWRITE_URI, SGMLDECL, SYSTEM, URI
 
Constructor Summary
ApacheCatalog()
           
 
Method Summary
 void addEntry(org.apache.xml.resolver.CatalogEntry entry)
          This method overrides the superclass method of the same name in order to add catalog entries back to the controlling XMLCatalog instance.
protected  org.apache.xml.resolver.Catalog newCatalog()
          Create a new ApacheCatalog instance.
 void setResolver(ApacheCatalogResolver resolver)
          Set the resolver object to callback.
 
Methods inherited from class org.apache.xml.resolver.Catalog
addDelegate, addReader, copyReaders, encodedByte, fixSlashes, getCatalogManager, getCurrentBase, getDefaultOverride, loadSystemCatalogs, makeAbsolute, normalizeURI, parseAllCatalogs, parseCatalog, parseCatalog, parseCatalog, parseCatalogFile, parsePendingCatalogs, resolveDoctype, resolveDocument, resolveEntity, resolveLocalPublic, resolveLocalSystem, resolveLocalURI, resolveNotation, resolvePublic, resolveSubordinateCatalogs, resolveSystem, resolveURI, setCatalogManager, setupReaders, unknownEntry
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

ApacheCatalog

public ApacheCatalog()
Method Detail

newCatalog

protected org.apache.xml.resolver.Catalog newCatalog()

Create a new ApacheCatalog instance.

This method overrides the superclass method of the same name in order to set the resolver object for callbacks. The reason we have to do this is that internally Catalog creates a new instance of itself for each external catalog file processed. That is, if two external catalog files are processed, there will be a total of two ApacheCatalog instances, and so on.

Overrides:
newCatalog in class org.apache.xml.resolver.Catalog

setResolver

public void setResolver(ApacheCatalogResolver resolver)
Set the resolver object to callback.


addEntry

public void addEntry(org.apache.xml.resolver.CatalogEntry entry)

This method overrides the superclass method of the same name in order to add catalog entries back to the controlling XMLCatalog instance. In this way, we can add classpath lookup for these entries.

When we add an external catalog file, the entries inside it get parsed by this method. Therefore, we override it to add each of them back to the controlling XMLCatalog instance. This is done by performing a callback to the ApacheCatalogResolver, which in turn calls the XMLCatalog.

XMLCatalog currently only understands PUBLIC and URI entry types, so we ignore the other types.

Overrides:
addEntry in class org.apache.xml.resolver.Catalog
Parameters:
entry - The CatalogEntry to process.


Copyright 2000-2005 Apache Software Foundation. All Rights Reserved.