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Java Source Code / Java Documentation » Workflow Engines » shark » org.enhydra.shark.api.client.wfbase

Source Cross Reference

Class Diagram

Java Document (Java Doc)

org.enhydra.shark.api.client.wfbase .BaseIterator

All known Subclasses:   org.enhydra.shark.ejb .BaseIteratorSSBean,  org.enhydra.shark .BaseIteratorWrapper,
BaseIterator
public interface BaseIterator (Code)
Java implementation of OMG's interface. This is how OMG defines it:
The BaseIterator interface is used to navigate relationships of cardinality greater than 1 in this specification. It supports specification of a filter using parameterized query expressions.

Method Summary
void goto_end()
     Positions the iterator such that the next "previous" retrieval will retrieve the last element in the collection.
void goto_start()
     Positions the iterator such that the next "next" retrieval will retrieve the first element in he collection.
int how_many()
     Returns the number of elements in the collection.
Map names_in_expression()
     OMG definition: Returns a set of parameters that are used to substitute variables in the query_expression.
String query_expression()
     Returns the query expression used to filter the contents of the iterator.
String query_grammar()
     OMG definition: The query_grammar attribute identifies the query grammar used to define the query expression.
void set_names_in_expression(Map query)
     NOTE: It does not have any influence on querying in our implementations.
OMG definition: Defines a set of parameters that are used to substitute variables in the query_expression.
void set_query_expression(String query)
     Defines the query expression used to filter the contents of the iterator.
void set_query_grammar(String query_grammmar)
     OMG definition: The query_grammar attribute identifies the query grammar used to define the query expression.

Method Detail
goto_end
void goto_end() throws Exception(Code)
Positions the iterator such that the next "previous" retrieval will retrieve the last element in the collection.

goto_start
void goto_start() throws Exception(Code)
Positions the iterator such that the next "next" retrieval will retrieve the first element in he collection.

how_many
int how_many() throws Exception(Code)
Returns the number of elements in the collection.

names_in_expression
Map names_in_expression() throws Exception(Code)
OMG definition: Returns a set of parameters that are used to substitute variables in the query_expression. The parameters are defined by name-value pairs, where the name identifies the variable and the value represents the variable value to be substituted.

query_expression
String query_expression() throws Exception(Code)
Returns the query expression used to filter the contents of the iterator.

query_grammar
String query_grammar() throws Exception(Code)
OMG definition: The query_grammar attribute identifies the query grammar used to define the query expression. The Constraint Language defined by the OMG Object Trading Service is used as the mandatory query grammar in this specification; implementations of the WfM Facility may support additional query grammars. The Trader Constraint Language is identified via the string TCL.

set_names_in_expression
void set_names_in_expression(Map query) throws Exception, NameMismatch(Code)
NOTE: It does not have any influence on querying in our implementations.
OMG definition: Defines a set of parameters that are used to substitute variables in the query_expression. The parameters are defined by name-value pairs, where the name identifies the variable and the value represents the variable value to be substituted.

set_query_expression
void set_query_expression(String query) throws Exception, InvalidQuery(Code)
Defines the query expression used to filter the contents of the iterator.

set_query_grammar
void set_query_grammar(String query_grammmar) throws Exception, GrammarNotSupported(Code)
OMG definition: The query_grammar attribute identifies the query grammar used to define the query expression. The Constraint Language defined by the OMG Object Trading Service is used as the mandatory query gramma in this specification; implementations of the WfM Facility may support additional query grammars. The Trader Constraint Language is identified via the string TCL.

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