Top Description Fields Constructors Methods
org.springframework.beans.factory.xml

public Class BeansDtdResolver

extends Object
implements EntityResolver
Class Inheritance
All Implemented Interfaces
org.xml.sax.EntityResolver
Imports
java.io.FileNotFoundException, .IOException, org.apache.commons.logging.Log, .LogFactory, org.xml.sax.EntityResolver, .InputSource, org.springframework.core.io.ClassPathResource, .Resource, org.springframework.lang.Nullable

EntityResolver implementation for the Spring beans DTD, to load the DTD from the Spring class path (or JAR file).

Fetches "spring-beans.dtd" from the class path resource "/org/springframework/beans/factory/xml/spring-beans.dtd", no matter whether specified as some local URL that includes "spring-beans" in the DTD name or as "https://www.springframework.org/dtd/spring-beans-2.0.dtd".

Authors
Juergen Hoeller, Colin Sampaleanu
Since
04.06.2003
See Also
ResourceEntityResolver

Field Summary

Modifier and TypeField and Description
private static final String
private static final String
private static final Log

Constructor Summary

AccessConstructor and Description
public

Method Summary

Modifier and TypeMethod and Description
public InputSource
resolveEntity(String
The public identifier of the external entity being referenced, or null if none was supplied.
publicId
,
String
The system identifier of the external entity being referenced.
systemId
)

Implements org.xml.sax.EntityResolver.resolveEntity.

Allow the application to resolve external entities.
public String
toString()

Overrides java.lang.Object.toString.

Returns a string representation of the object.
Inherited from java.lang.Object:
cloneequalsfinalizegetClasshashCodenotifynotifyAllwaitwaitwait

Field Detail

DTD_EXTENSIONback to summary
private static final String DTD_EXTENSION
DTD_NAMEback to summary
private static final String DTD_NAME
loggerback to summary
private static final Log logger

Constructor Detail

BeansDtdResolverback to summary
public BeansDtdResolver()

Method Detail

resolveEntityback to summary
public InputSource resolveEntity(String publicId, String systemId) throws IOException

Implements org.xml.sax.EntityResolver.resolveEntity.

Doc from org.xml.sax.EntityResolver.resolveEntity.

Allow the application to resolve external entities.

The parser will call this method before opening any external entity except the top-level document entity. Such entities include the external DTD subset and external parameter entities referenced within the DTD (in either case, only if the parser reads external parameter entities), and external general entities referenced within the document element (if the parser reads external general entities). The application may request that the parser locate the entity itself, that it use an alternative URI, or that it use data provided by the application (as a character or byte input stream).

Application writers can use this method to redirect external system identifiers to secure and/or local URIs, to look up public identifiers in a catalogue, or to read an entity from a database or other input source (including, for example, a dialog box). Neither XML nor SAX specifies a preferred policy for using public or system IDs to resolve resources. However, SAX specifies how to interpret any InputSource returned by this method, and that if none is returned, then the system ID will be dereferenced as a URL.

If the system identifier is a URL, the SAX parser must resolve it fully before reporting it to the application.

Parameters
publicId:String

The public identifier of the external entity being referenced, or null if none was supplied.

systemId:String

The system identifier of the external entity being referenced.

Returns:InputSource

An InputSource object describing the new input source, or null to request that the parser open a regular URI connection to the system identifier.

Annotations
@Override
@Nullable
Exceptions
IOException:
A Java-specific IO exception, possibly the result of creating a new InputStream or Reader for the InputSource.
toStringback to summary
public String toString()

Overrides java.lang.Object.toString.

Doc from java.lang.Object.toString.

Returns a string representation of the object.

Returns:String

a string representation of the object.

Annotations
@Override