com.springsource.util.osgi.manifest.parse.standard
Class MultiplexingVisitor

java.lang.Object
  com.springsource.util.osgi.manifest.parse.standard.MultiplexingVisitor

All Implemented Interfaces:

HeaderVisitor

public class MultiplexingVisitor
extends java.lang.Object
implements HeaderVisitor

A basic visitor that delegates to some array of other visitors. This visitor is used when multiple are plugged into the parser - to ensure the standard visitor still runs, in addition to the user specified visitors. Concurrent Semantics
Threadsafe.

Author:

Andy Clement

Field Summary

private static HeaderVisitor[]	NONE
private HeaderVisitor[]	visitors

Constructor Summary

MultiplexingVisitor(HeaderVisitor... visitors)

Method Summary

void	clauseEnded() Called when a clause ends.
void	endvisit() Called when the end of the input has been reached.
HeaderDeclaration	getFirstHeaderDeclaration()
java.util.List<HeaderDeclaration>	getHeaderDeclarations()
void	initialize() Called ahead of parsing a new header
void	visitAttribute(java.lang.String name, java.lang.String value) Visit a new attribute (parsed from input of the form name=value)
void	visitDirective(java.lang.String name, java.lang.String value) Visit a new directive (parsed from input of the form name:=value)
void	visitSymbolicName(java.lang.String name) Called to visit a symbolic name.
void	visitUniqueName(java.lang.String name) Called to visit a unique name.
void	visitWildcardName(java.lang.String name) Called to visit a wildcard name.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

NONE

private static final HeaderVisitor[] NONE

visitors

private HeaderVisitor[] visitors

Constructor Detail

MultiplexingVisitor

public MultiplexingVisitor(HeaderVisitor... visitors)

Method Detail

endvisit

public void endvisit()

Description copied from interface: HeaderVisitor

Called when the end of the input has been reached.

Specified by:

endvisit in interface HeaderVisitor

getHeaderDeclarations

public java.util.List<HeaderDeclaration> getHeaderDeclarations()

Specified by:

getHeaderDeclarations in interface HeaderVisitor

Returns:

a list of all HeaderDeclarations if this visitor has been collecting the information. Empty list if nothing has been collected

visitAttribute

public void visitAttribute(java.lang.String name,
                           java.lang.String value)

Description copied from interface: HeaderVisitor

Visit a new attribute (parsed from input of the form name=value)

Specified by:

visitAttribute in interface HeaderVisitor

visitDirective

public void visitDirective(java.lang.String name,
                           java.lang.String value)

Description copied from interface: HeaderVisitor

Visit a new directive (parsed from input of the form name:=value)

Specified by:

visitDirective in interface HeaderVisitor

visitSymbolicName

public void visitSymbolicName(java.lang.String name)

Description copied from interface: HeaderVisitor

Called to visit a symbolic name. These are of the form: "symbolic-name :: = token('.'token)*". So basically a sequence of dot separated tokens.

Specified by:

visitSymbolicName in interface HeaderVisitor

visitWildcardName

public void visitWildcardName(java.lang.String name)

Description copied from interface: HeaderVisitor

Called to visit a wildcard name. These are similar to a unique name but wildcards are permitted. These are valid wildcarded names: '*' or 'com.foo.*' or 'com.foo.goo'.

Specified by:

visitWildcardName in interface HeaderVisitor

visitUniqueName

public void visitUniqueName(java.lang.String name)

Description copied from interface: HeaderVisitor

Called to visit a unique name. These are of the form: "unique-name :: = identifier('.'identifier)*". So basically a sequence of dot separated identifiers..

Specified by:

visitUniqueName in interface HeaderVisitor

clauseEnded

public void clauseEnded()

Description copied from interface: HeaderVisitor

Called when a clause ends. Clauses are comma separated: header=clause (',' clause)*. It is a sign that a new clause is about to start.

Specified by:

clauseEnded in interface HeaderVisitor

getFirstHeaderDeclaration

public HeaderDeclaration getFirstHeaderDeclaration()

Specified by:

getFirstHeaderDeclaration in interface HeaderVisitor

Returns:

the first (and probably only) HeaderDeclaration, otherwise null

initialize

public void initialize()

Description copied from interface: HeaderVisitor

Called ahead of parsing a new header

Specified by:

initialize in interface HeaderVisitor