SelectClause (Hibernate API Documentation) - Hibernate 3.2.3 正式版 API 英文文档

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org.hibernate.hql.ast.tree
Class SelectClause

java.lang.Object
  antlr.BaseAST
      antlr.CommonAST
          org.hibernate.hql.ast.tree.Node
              org.hibernate.hql.ast.tree.SqlNode
                  org.hibernate.hql.ast.tree.HqlSqlWalkerNode
                      org.hibernate.hql.ast.tree.SelectExpressionList
                          org.hibernate.hql.ast.tree.SelectClause

All Implemented Interfaces:: antlr.collections.AST, InitializeableNode, Serializable

public class SelectClause
extends SelectExpressionList

Represents the list of expressions in a SELECT clause.

Author:: josh Sep 21, 2004 7:53:55 AM
See Also:: Serialized Form

Field Summary

static boolean VERSION2_SQL


Fields inherited from class antlr.BaseAST

down, right

Constructor Summary

SelectClause()


Method Summary

List getCollectionFromElements()


String[][] getColumnNames()
          The column alias names being used in the generated SQL.

Constructor getConstructor()
          The constructor to use for dynamic instantiation queries.

protected antlr.collections.AST getFirstSelectExpression()
          Returns the first select expression node that should be considered when building the array of select expressions.

List getFromElementsForLoad()
          FromElements which need to be accounted for in the load phase (either for return or for fetch).

String[] getQueryReturnAliases()
          The HQL aliases, or generated aliases

Type[] getQueryReturnTypes()
          The types actually being returned from this query at the "object level".

void initializeDerivedSelectClause(FromClause fromClause)
          Prepares a derived (i.e., not explicitly defined in the query) select clause.

void initializeExplicitSelectClause(FromClause fromClause)
          Prepares an explicitly defined select clause.

boolean isDistinct()


boolean isList()


boolean isMap()


boolean isScalarSelect()
          Does this SelectClause represent a scalar query

Methods inherited from class org.hibernate.hql.ast.tree.SelectExpressionList

collectSelectExpressions

Methods inherited from class org.hibernate.hql.ast.tree.HqlSqlWalkerNode

getAliasGenerator, getASTFactory, getSessionFactoryHelper, getWalker, initialize

Methods inherited from class org.hibernate.hql.ast.tree.SqlNode

getDataType, getOriginalText, setDataType, setText

Methods inherited from class org.hibernate.hql.ast.tree.Node

getColumn, getFilename, getLine, getRenderText, getTextLength, initialize, initialize

Methods inherited from class antlr.CommonAST

getText, getType, initialize, setType

Methods inherited from class antlr.BaseAST

addChild, decode, encode, equals, equalsList, equalsListPartial, equalsTree, equalsTreePartial, findAll, findAllPartial, getFirstChild, getNextSibling, getNumberOfChildren, getTokenNames, removeChildren, setFirstChild, setNextSibling, setVerboseStringConversion, toString, toStringList, toStringTree, xmlSerialize, xmlSerializeNode, xmlSerializeRootClose, xmlSerializeRootOpen

Methods inherited from class java.lang.Object

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

Field Detail

VERSION2_SQL

public static boolean VERSION2_SQL

Constructor Detail

SelectClause

public SelectClause()

Method Detail

isScalarSelect

public boolean isScalarSelect()

Does this SelectClause represent a scalar query

Returns:: True if this is a scalara select clause; false otherwise.

isDistinct

public boolean isDistinct()

getFromElementsForLoad

public List getFromElementsForLoad()

FromElements which need to be accounted for in the load phase (either for return or for fetch).

Returns:: List of appropriate FromElements.

getQueryReturnTypes

public Type[] getQueryReturnTypes()

The types actually being returned from this query at the "object level".

Returns:: The query return types.

getQueryReturnAliases

public String[] getQueryReturnAliases()

The HQL aliases, or generated aliases

getColumnNames

public String[][] getColumnNames()

The column alias names being used in the generated SQL.

Returns:: The SQL column aliases.

getConstructor

public Constructor getConstructor()

The constructor to use for dynamic instantiation queries.

Returns:: The appropriate Constructor reference, or null if not a dynamic instantiation query.

isMap

public boolean isMap()

isList

public boolean isList()

initializeExplicitSelectClause

public void initializeExplicitSelectClause(FromClause fromClause)
                                    throws antlr.SemanticException

Prepares an explicitly defined select clause.

Parameters:: fromClause - The from clause linked to this select clause.
Throws:: antlr.SemanticException

initializeDerivedSelectClause

public void initializeDerivedSelectClause(FromClause fromClause)
                                   throws antlr.SemanticException

Prepares a derived (i.e., not explicitly defined in the query) select clause.

Parameters:: fromClause - The from clause to which this select clause is linked.
Throws:: antlr.SemanticException

getFirstSelectExpression

protected antlr.collections.AST getFirstSelectExpression()

Description copied from class: SelectExpressionList

Returns the first select expression node that should be considered when building the array of select expressions.

Specified by:: getFirstSelectExpression in class SelectExpressionList

Returns:: the first select expression node that should be considered when building the array of select expressions

getCollectionFromElements

public List getCollectionFromElements()