org.datanucleus.query.compiler
Class SQLCompiler

java.lang.Object
  org.datanucleus.query.compiler.JavaQueryCompiler
      org.datanucleus.query.compiler.SQLCompiler

All Implemented Interfaces:

SymbolResolver

public class SQLCompiler
extends JavaQueryCompiler

Implementation of a compiler for SQL (simplified ANSI-like SQL for non-RDBMS). Supported SQL is not "SQL" as such, but involves classes/field names. Examples :-

 SELECT * FROM Contact
 

Will select objects of type Contact, where "Contact" is the name of some class resolved by use of the imports and aliases in MetaData. In general it will support :-

 SELECT {resultExpr} 
     FROM {fromExpr} 
     WHERE {whereExpr} 
     GROUP BY {groupExpr} 
     HAVING {havingExpr} 
     ORDER BY {orderExpr}
 approximately following JPQL (which is virtually SQL anyway)
 

Field Summary

Fields inherited from class org.datanucleus.query.compiler.JavaQueryCompiler

candidateAlias, candidateClass, candidates, clr, filter, from, grouping, having, imports, metaDataManager, ordering, parameters, parser, result, symtbl, variables

Constructor Summary

SQLCompiler(MetaDataManager metaDataManager, ClassLoaderResolver clr, java.lang.String from, java.lang.Class candidateClass, java.util.Collection candidates, java.lang.String filter, Imports imports, java.lang.String ordering, java.lang.String result, java.lang.String grouping, java.lang.String having, java.lang.String params)

Method Summary

QueryCompilation

compile(java.util.Map parameters) Method to compile the query, and return the compiled results.

Methods inherited from class org.datanucleus.query.compiler.JavaQueryCompiler

compileCandidatesParametersVariables, compileFilter, compileFrom, compileGrouping, compileHaving, compileOrdering, compileResult, getType

Methods inherited from class java.lang.Object

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

Constructor Detail

SQLCompiler

public SQLCompiler(MetaDataManager metaDataManager,
                   ClassLoaderResolver clr,
                   java.lang.String from,
                   java.lang.Class candidateClass,
                   java.util.Collection candidates,
                   java.lang.String filter,
                   Imports imports,
                   java.lang.String ordering,
                   java.lang.String result,
                   java.lang.String grouping,
                   java.lang.String having,
                   java.lang.String params)

Method Detail

compile

public QueryCompilation compile(java.util.Map parameters)

Method to compile the query, and return the compiled results.

Specified by:

compile in class JavaQueryCompiler

Parameters:

parameters - the parameter map of values keyed by param name

Returns:

The compiled query