Package org.hibernate.hql.ast.tree

Class FromClause

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.FromClause

All Implemented Interfaces:

antlr.collections.AST, Serializable, HqlSqlTokenTypes, DisplayableNode, InitializeableNode

public class FromClause
extends HqlSqlWalkerNode
implements HqlSqlTokenTypes, DisplayableNode

Represents the 'FROM' part of a query or subquery, containing all mapped class references.

See Also:

• Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
static final int	ROOT_LEVEL

Fields inherited from class antlr.BaseAST

down, right

Fields inherited from interface org.hibernate.hql.antlr.HqlSqlTokenTypes

AGGREGATE, ALIAS, ALIAS_REF, ALL, AND, ANY, AS, ASCENDING, AVG, BETWEEN, BOGUS, BOTH, CASE, CASE2, CLASS, CLOSE, CLOSE_BRACKET, COLON, COMMA, CONCAT, CONSTANT, CONSTRUCTOR, COUNT, DELETE, DESCENDING, DISTINCT, DIV, DOT, ELEMENTS, ELSE, EMPTY, END, ENTRY, EOF, EQ, ESCAPE, ESCqs, EXISTS, EXPONENT, EXPR_LIST, FALSE, FETCH, FILTER_ENTITY, FILTERS, FLOAT_SUFFIX, FROM, FROM_FRAGMENT, FULL, GE, GROUP, GT, HAVING, HEX_DIGIT, ID_LETTER, ID_START_LETTER, IDENT, IMPLIED_FROM, IN, IN_LIST, INDEX_OP, INDICES, INNER, INSERT, INTO, IS, IS_NOT_NULL, IS_NULL, JAVA_CONSTANT, JOIN, JOIN_FRAGMENT, KEY, LE, LEADING, LEFT, LEFT_OUTER, LIKE, LITERAL_ascending, LITERAL_by, LITERAL_descending, LT, MAX, MEMBER, METHOD_CALL, METHOD_NAME, MIN, MINUS, MOD, NAMED_PARAM, NE, NEW, NOT, NOT_BETWEEN, NOT_IN, NOT_LIKE, NULL, NULL_TREE_LOOKAHEAD, NUM_BIG_DECIMAL, NUM_BIG_INTEGER, NUM_DOUBLE, NUM_FLOAT, NUM_INT, NUM_LONG, OBJECT, OF, ON, OPEN, OPEN_BRACKET, OR, ORDER, ORDER_ELEMENT, OUTER, PARAM, PLUS, PROPERTIES, PROPERTY_REF, QUERY, QUOTED_STRING, RANGE, RESULT_VARIABLE_REF, RIGHT, RIGHT_OUTER, ROW_STAR, SELECT, SELECT_CLAUSE, SELECT_COLUMNS, SELECT_EXPR, SELECT_FROM, SET, SOME, SQL_NE, SQL_TOKEN, STAR, SUM, THEN, THETA_JOINS, TRAILING, TRUE, UNARY_MINUS, UNARY_PLUS, UNION, UPDATE, VALUE, VECTOR_EXPR, VERSIONED, WEIRD_IDENT, WHEN, WHERE, WITH, WS

Constructor Summary

Constructors

Constructor	Description
FromClause()

Method Summary

Modifier and Type	Method	Description
FromElement	addFromElement(String path, antlr.collections.AST alias)	Adds a new from element to the from node.
void	addImpliedFromElement(FromElement element)
boolean	containsClassAlias(String alias)	Returns true if the from node contains the class alias name.
boolean	containsTableAlias(String alias)	Returns true if the from node contains the table alias name.
FromElement	findFromElementBySqlAlias(String sqlAlias)
FromElement	findFromElementByUserOrSqlAlias(String userAlias, String sqlAlias)
List	getCollectionFetches()
String	getDisplayText()	Returns additional display text for the AST node.
List	getExplicitFromElements()
FromElement	getFromElement()
FromElement	getFromElement(String aliasOrClassName)	Retreives the from-element represented by the given alias.
List	getFromElements()	Returns the list of from elements in order.
int	getLevel()
FromClause	getParentFromClause()
List	getProjectionList()	Returns the list of from elements that will be part of the result set.
boolean	hasCollectionFecthes()
boolean	isFromElementAlias(String possibleAlias)	Convenience method to check whether a given token represents a from-element alias.
boolean	isSubQuery()
FromClause	locateChildFromClauseWithJoinByPath(String path)
int	nextFromElementCounter()
void	promoteJoin(FromElement elem)
void	resolve()
void	setParentFromClause(FromClause parentFromClause)
String	toString()

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, toStringList, toStringTree, xmlSerialize, xmlSerializeNode, xmlSerializeRootClose, xmlSerializeRootOpen

Methods inherited from class java.lang.Object

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

Field Details

ROOT_LEVEL

public static final int ROOT_LEVEL

See Also:

• Constant Field Values

Constructor Details

FromClause

public FromClause()

Method Details

addFromElement

public FromElement addFromElement(String path,
 antlr.collections.AST alias)
                           throws antlr.SemanticException

Adds a new from element to the from node.

Parameters:

path - The reference to the class.

alias - The alias AST.

Returns:

FromElement - The new FROM element.

Throws:

antlr.SemanticException

getFromElement

public FromElement getFromElement(String aliasOrClassName)

Retreives the from-element represented by the given alias.

Parameters:

aliasOrClassName - The alias by which to locate the from-element.

Returns:

The from-element assigned the given alias, or null if none.

findFromElementBySqlAlias

public FromElement findFromElementBySqlAlias(String sqlAlias)

findFromElementByUserOrSqlAlias

public FromElement findFromElementByUserOrSqlAlias(String userAlias,
 String sqlAlias)

isFromElementAlias

public boolean isFromElementAlias(String possibleAlias)

Convenience method to check whether a given token represents a from-element alias.

Parameters:

possibleAlias - The potential from-element alias to check.

Returns:

True if the possibleAlias is an alias to a from-element visible from this point in the query graph.

getFromElements

public List getFromElements()

Returns the list of from elements in order.

Returns:

the list of from elements (instances of FromElement).

getFromElement

public FromElement getFromElement()

getProjectionList

public List getProjectionList()

Returns the list of from elements that will be part of the result set.

Returns:

the list of from elements that will be part of the result set.

getCollectionFetches

public List getCollectionFetches()

hasCollectionFecthes

public boolean hasCollectionFecthes()

getExplicitFromElements

public List getExplicitFromElements()

containsClassAlias

public boolean containsClassAlias(String alias)

Returns true if the from node contains the class alias name.

Parameters:

alias - The HQL class alias name.

Returns:

true if the from node contains the class alias name.

containsTableAlias

public boolean containsTableAlias(String alias)

Returns true if the from node contains the table alias name.

Parameters:

alias - The SQL table alias name.

Returns:

true if the from node contains the table alias name.

getDisplayText

public String getDisplayText()

Description copied from interface: DisplayableNode

Returns additional display text for the AST node.

Specified by:

getDisplayText in interface DisplayableNode

Returns:

String - The additional display text.

setParentFromClause

public void setParentFromClause(FromClause parentFromClause)

locateChildFromClauseWithJoinByPath

public FromClause locateChildFromClauseWithJoinByPath(String path)

promoteJoin

public void promoteJoin(FromElement elem)

isSubQuery

public boolean isSubQuery()

getParentFromClause

public FromClause getParentFromClause()

getLevel

public int getLevel()

nextFromElementCounter

public int nextFromElementCounter()

resolve

public void resolve()

addImpliedFromElement

public void addImpliedFromElement(FromElement element)

toString

public String toString()

Specified by:

toString in interface antlr.collections.AST

Overrides:

toString in class antlr.BaseAST