org.hibernate.hql.ast
Class HqlSqlWalker

java.lang.Object
  antlr.TreeParser
      org.hibernate.hql.antlr.HqlSqlBaseWalker
          org.hibernate.hql.ast.HqlSqlWalker

All Implemented Interfaces:

ParameterBinder.NamedParameterSource, HqlSqlTokenTypes, ErrorReporter

public class HqlSqlWalker
extends HqlSqlBaseWalker
implements ErrorReporter, ParameterBinder.NamedParameterSource

Implements methods used by the HQL->SQL tree transform grammar (a.k.a. the second phase).

• Isolates the Hibernate API-specific code from the ANTLR generated code.
• Handles the SQL framgents generated by the persisters in order to create the SELECT and FROM clauses, taking into account the joins and projections that are implied by the mappings (persister/queryable).
• Uses SqlASTFactory to create customized AST nodes.

See Also:

SqlASTFactory

Field Summary

Fields inherited from class org.hibernate.hql.antlr.HqlSqlBaseWalker

_tokenNames, _tokenSet_0

Fields inherited from class antlr.TreeParser

_retTree, astFactory, ASTNULL, inputState, returnAST, tokenNames, traceDepth

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, 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, LE, LEADING, LEFT, LEFT_OUTER, LIKE, LITERAL_ascending, LITERAL_by, LITERAL_descending, LT, MAX, MEMBER, METHOD_CALL, METHOD_NAME, MIN, MINUS, NAMED_PARAM, NE, NEW, NOT, NOT_BETWEEN, NOT_IN, NOT_LIKE, NULL, NULL_TREE_LOOKAHEAD, 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, 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, VECTOR_EXPR, VERSIONED, WEIRD_IDENT, WHEN, WHERE, WITH, WS

Constructor Summary

HqlSqlWalker(QueryTranslatorImpl qti, SessionFactoryImplementor sfi, HqlParser parser, Map tokenReplacements, String collectionRole)
Create a new tree transformer.

Method Summary

void	addQuerySpaces(Serializable[] spaces)
protected void	beforeSelectClause()
protected antlr.collections.AST	createFromElement(String path, antlr.collections.AST alias, antlr.collections.AST propertyFetch)
protected antlr.collections.AST	createFromFilterElement(antlr.collections.AST filterEntity, antlr.collections.AST alias)
protected void	createFromJoinElement(antlr.collections.AST path, antlr.collections.AST alias, int joinType, antlr.collections.AST fetchNode, antlr.collections.AST propertyFetch, antlr.collections.AST with)
protected antlr.collections.AST	createIntoClause(String path, antlr.collections.AST propertySpec)
protected void	evaluateAssignment(antlr.collections.AST eq)
protected antlr.collections.AST	generateNamedParameter(antlr.collections.AST delimiterNode, antlr.collections.AST nameNode)
protected antlr.collections.AST	generatePositionalParameter(antlr.collections.AST inputNode)
AliasGenerator	getAliasGenerator()
ArrayList	getAssignmentSpecifications()
ASTPrinter	getASTPrinter()
FromClause	getCurrentFromClause()
Map	getEnabledFilters()
FromClause	getFinalFromClause()
int	getImpliedJoinType()
LiteralProcessor	getLiteralProcessor()
int[]	getNamedParameterLocations(String name) Returns the locations of all occurrences of the named parameter.
int	getNumberOfParametersInSetClause()
ArrayList	getParameters()
ParseErrorHandler	getParseErrorHandler()
Set	getQuerySpaces() Returns the set of unique query spaces (a.k.a.
String[]	getReturnAliases()
Type[]	getReturnTypes()
SelectClause	getSelectClause()
SessionFactoryHelper	getSessionFactoryHelper()
Map	getTokenReplacements()
boolean	isFilter()
protected boolean	isNonQualifiedPropertyRef(antlr.collections.AST ident)
boolean	isShallowQuery()
protected void	lookupAlias(antlr.collections.AST aliasRef)
protected antlr.collections.AST	lookupNonQualifiedProperty(antlr.collections.AST property)
protected antlr.collections.AST	lookupProperty(antlr.collections.AST dot, boolean root, boolean inSelect)
static void	panic()
protected void	postProcessDelete(antlr.collections.AST delete)
protected void	postProcessDML(RestrictableStatement statement)
protected void	postProcessInsert(antlr.collections.AST insert)
protected void	postProcessUpdate(antlr.collections.AST update)
protected void	prepareArithmeticOperator(antlr.collections.AST operator)
protected void	prepareFromClauseInputTree(antlr.collections.AST fromClauseInput) Pre-process the from clause input tree.
protected void	prepareLogicOperator(antlr.collections.AST operator)
protected void	prepareVersioned(antlr.collections.AST updateNode, antlr.collections.AST versioned)
protected void	processBoolean(antlr.collections.AST constant)
protected void	processConstant(antlr.collections.AST constant)
protected void	processConstructor(antlr.collections.AST constructor)
protected void	processFunction(antlr.collections.AST functionCall, boolean inSelect)
protected void	processIndex(antlr.collections.AST indexOp)
protected void	processNumericLiteral(antlr.collections.AST literal)
protected void	processQuery(antlr.collections.AST select, antlr.collections.AST query)
protected void	pushFromClause(antlr.collections.AST fromNode, antlr.collections.AST inputFromNode) Sets the current 'FROM' context.
void	reportError(antlr.RecognitionException e)
void	reportError(String s)
void	reportWarning(String s)
protected void	resolve(antlr.collections.AST node)
protected void	resolveSelectExpression(antlr.collections.AST node)
protected void	setAlias(antlr.collections.AST selectExpr, antlr.collections.AST ident)
protected void	setImpliedJoinType(int joinType)
static boolean	supportsIdGenWithBulkInsertion(IdentifierGenerator generator)

Methods inherited from class org.hibernate.hql.antlr.HqlSqlBaseWalker

addrExpr, addrExprLhs, aggregateExpr, aliasedSelectExpr, aliasRef, arithmeticExpr, assignment, caseExpr, collectionFunction, collectionFunctionOrSubselect, comparisonExpr, constant, constructor, count, deleteStatement, expr, exprOrSubquery, fromClause, fromElement, fromElementList, functionCall, getCurrentClauseType, getCurrentStatementType, getCurrentTopLevelClauseType, getStatementType, groupClause, identifier, inRhs, insertablePropertySpec, insertStatement, intoClause, isComparativeExpressionClause, isInCase, isInFrom, isInFunctionCall, isInSelect, isSelectStatement, isSubQuery, joinElement, joinType, literal, logicalExpr, newValue, numericInteger, orderClause, orderExprs, parameter, path, pathAsIdent, propertyName, propertyRef, propertyRefLhs, query, selectClause, selectExpr, selectExprList, selectStatement, setClause, statement, updateStatement, whereClause, withClause

Methods inherited from class antlr.TreeParser

getAST, getASTFactory, getTokenName, getTokenNames, match, match, matchNot, setASTFactory, setASTNodeClass, setASTNodeType, traceIn, traceIndent, traceOut

Methods inherited from class java.lang.Object

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

Constructor Detail

HqlSqlWalker

public HqlSqlWalker(QueryTranslatorImpl qti,
                    SessionFactoryImplementor sfi,
                    HqlParser parser,
                    Map tokenReplacements,
                    String collectionRole)

Create a new tree transformer.

Parameters:

qti - Back pointer to the query translator implementation that is using this tree transform.

sfi - The session factory implementor where the Hibernate mappings can be found.

parser - A reference to the phase-1 parser

tokenReplacements - Registers the token replacement map with the walker. This map will be used to substitute function names and constants.

collectionRole - The collection role name of the collection used as the basis for the filter, NULL if this is not a collection filter compilation.

Method Detail

prepareFromClauseInputTree

protected void prepareFromClauseInputTree(antlr.collections.AST fromClauseInput)

Description copied from class: HqlSqlBaseWalker

Pre-process the from clause input tree.

Overrides:

prepareFromClauseInputTree in class HqlSqlBaseWalker

isFilter

public boolean isFilter()

getSessionFactoryHelper

public SessionFactoryHelper getSessionFactoryHelper()

getTokenReplacements

public Map getTokenReplacements()

getAliasGenerator

public AliasGenerator getAliasGenerator()

getCurrentFromClause

public FromClause getCurrentFromClause()

getParseErrorHandler

public ParseErrorHandler getParseErrorHandler()

reportError

public void reportError(antlr.RecognitionException e)

Specified by:

reportError in interface ErrorReporter

Overrides:

reportError in class antlr.TreeParser

reportError

public void reportError(String s)

Specified by:

reportError in interface ErrorReporter

Overrides:

reportError in class antlr.TreeParser

reportWarning

public void reportWarning(String s)

Specified by:

reportWarning in interface ErrorReporter

Overrides:

reportWarning in class antlr.TreeParser

getQuerySpaces

public Set getQuerySpaces()

Returns the set of unique query spaces (a.k.a. table names) that occurred in the query.

Returns:

A set of table names (Strings).

createFromElement

protected antlr.collections.AST createFromElement(String path,
                                                  antlr.collections.AST alias,
                                                  antlr.collections.AST propertyFetch)
                                           throws antlr.SemanticException

Overrides:

createFromElement in class HqlSqlBaseWalker

Throws:

antlr.SemanticException

createFromFilterElement

protected antlr.collections.AST createFromFilterElement(antlr.collections.AST filterEntity,
                                                        antlr.collections.AST alias)
                                                 throws antlr.SemanticException

Overrides:

createFromFilterElement in class HqlSqlBaseWalker

Throws:

antlr.SemanticException

createFromJoinElement

protected void createFromJoinElement(antlr.collections.AST path,
                                     antlr.collections.AST alias,
                                     int joinType,
                                     antlr.collections.AST fetchNode,
                                     antlr.collections.AST propertyFetch,
                                     antlr.collections.AST with)
                              throws antlr.SemanticException

Overrides:

createFromJoinElement in class HqlSqlBaseWalker

Throws:

antlr.SemanticException

pushFromClause

protected void pushFromClause(antlr.collections.AST fromNode,
                              antlr.collections.AST inputFromNode)

Sets the current 'FROM' context.

Overrides:

pushFromClause in class HqlSqlBaseWalker

Parameters:

fromNode - The new 'FROM' context.

inputFromNode - The from node from the input AST.

lookupAlias

protected void lookupAlias(antlr.collections.AST aliasRef)
                    throws antlr.SemanticException

Overrides:

lookupAlias in class HqlSqlBaseWalker

Throws:

antlr.SemanticException

setImpliedJoinType

protected void setImpliedJoinType(int joinType)

Overrides:

setImpliedJoinType in class HqlSqlBaseWalker

getImpliedJoinType

public int getImpliedJoinType()

lookupProperty

protected antlr.collections.AST lookupProperty(antlr.collections.AST dot,
                                               boolean root,
                                               boolean inSelect)
                                        throws antlr.SemanticException

Overrides:

lookupProperty in class HqlSqlBaseWalker

Throws:

antlr.SemanticException

isNonQualifiedPropertyRef

protected boolean isNonQualifiedPropertyRef(antlr.collections.AST ident)

Overrides:

isNonQualifiedPropertyRef in class HqlSqlBaseWalker

lookupNonQualifiedProperty

protected antlr.collections.AST lookupNonQualifiedProperty(antlr.collections.AST property)
                                                    throws antlr.SemanticException

Overrides:

lookupNonQualifiedProperty in class HqlSqlBaseWalker

Throws:

antlr.SemanticException

processQuery

protected void processQuery(antlr.collections.AST select,
                            antlr.collections.AST query)
                     throws antlr.SemanticException

Overrides:

processQuery in class HqlSqlBaseWalker

Throws:

antlr.SemanticException

postProcessDML

protected void postProcessDML(RestrictableStatement statement)
                       throws antlr.SemanticException

Throws:

antlr.SemanticException

postProcessUpdate

protected void postProcessUpdate(antlr.collections.AST update)
                          throws antlr.SemanticException

Overrides:

postProcessUpdate in class HqlSqlBaseWalker

Throws:

antlr.SemanticException

postProcessDelete

protected void postProcessDelete(antlr.collections.AST delete)
                          throws antlr.SemanticException

Overrides:

postProcessDelete in class HqlSqlBaseWalker

Throws:

antlr.SemanticException

supportsIdGenWithBulkInsertion

public static boolean supportsIdGenWithBulkInsertion(IdentifierGenerator generator)

postProcessInsert

protected void postProcessInsert(antlr.collections.AST insert)
                          throws antlr.SemanticException,
                                 QueryException

Overrides:

postProcessInsert in class HqlSqlBaseWalker

Throws:

antlr.SemanticException

QueryException

resolve

protected void resolve(antlr.collections.AST node)
                throws antlr.SemanticException

Overrides:

resolve in class HqlSqlBaseWalker

Throws:

antlr.SemanticException

resolveSelectExpression

protected void resolveSelectExpression(antlr.collections.AST node)
                                throws antlr.SemanticException

Overrides:

resolveSelectExpression in class HqlSqlBaseWalker

Throws:

antlr.SemanticException

beforeSelectClause

protected void beforeSelectClause()
                           throws antlr.SemanticException

Overrides:

beforeSelectClause in class HqlSqlBaseWalker

Throws:

antlr.SemanticException

generatePositionalParameter

protected antlr.collections.AST generatePositionalParameter(antlr.collections.AST inputNode)
                                                     throws antlr.SemanticException

Overrides:

generatePositionalParameter in class HqlSqlBaseWalker

Throws:

antlr.SemanticException

generateNamedParameter

protected antlr.collections.AST generateNamedParameter(antlr.collections.AST delimiterNode,
                                                       antlr.collections.AST nameNode)
                                                throws antlr.SemanticException

Overrides:

generateNamedParameter in class HqlSqlBaseWalker

Throws:

antlr.SemanticException

processConstant

protected void processConstant(antlr.collections.AST constant)
                        throws antlr.SemanticException

Overrides:

processConstant in class HqlSqlBaseWalker

Throws:

antlr.SemanticException

processBoolean

protected void processBoolean(antlr.collections.AST constant)
                       throws antlr.SemanticException

Overrides:

processBoolean in class HqlSqlBaseWalker

Throws:

antlr.SemanticException

processNumericLiteral

protected void processNumericLiteral(antlr.collections.AST literal)

Overrides:

processNumericLiteral in class HqlSqlBaseWalker

processIndex

protected void processIndex(antlr.collections.AST indexOp)
                     throws antlr.SemanticException

Overrides:

processIndex in class HqlSqlBaseWalker

Throws:

antlr.SemanticException

processFunction

protected void processFunction(antlr.collections.AST functionCall,
                               boolean inSelect)
                        throws antlr.SemanticException

Overrides:

processFunction in class HqlSqlBaseWalker

Throws:

antlr.SemanticException

processConstructor

protected void processConstructor(antlr.collections.AST constructor)
                           throws antlr.SemanticException

Overrides:

processConstructor in class HqlSqlBaseWalker

Throws:

antlr.SemanticException

setAlias

protected void setAlias(antlr.collections.AST selectExpr,
                        antlr.collections.AST ident)

Overrides:

setAlias in class HqlSqlBaseWalker

getNamedParameterLocations

public int[] getNamedParameterLocations(String name)
                                 throws QueryException

Returns the locations of all occurrences of the named parameter.

Specified by:

getNamedParameterLocations in interface ParameterBinder.NamedParameterSource

Throws:

QueryException

addQuerySpaces

public void addQuerySpaces(Serializable[] spaces)

getReturnTypes

public Type[] getReturnTypes()

getReturnAliases

public String[] getReturnAliases()

getSelectClause

public SelectClause getSelectClause()

getFinalFromClause

public FromClause getFinalFromClause()

isShallowQuery

public boolean isShallowQuery()

getEnabledFilters

public Map getEnabledFilters()

getLiteralProcessor

public LiteralProcessor getLiteralProcessor()

getASTPrinter

public ASTPrinter getASTPrinter()

getParameters

public ArrayList getParameters()

getNumberOfParametersInSetClause

public int getNumberOfParametersInSetClause()

evaluateAssignment

protected void evaluateAssignment(antlr.collections.AST eq)
                           throws antlr.SemanticException

Overrides:

evaluateAssignment in class HqlSqlBaseWalker

Throws:

antlr.SemanticException

getAssignmentSpecifications

public ArrayList getAssignmentSpecifications()

createIntoClause

protected antlr.collections.AST createIntoClause(String path,
                                                 antlr.collections.AST propertySpec)
                                          throws antlr.SemanticException

Overrides:

createIntoClause in class HqlSqlBaseWalker

Throws:

antlr.SemanticException

prepareVersioned

protected void prepareVersioned(antlr.collections.AST updateNode,
                                antlr.collections.AST versioned)
                         throws antlr.SemanticException

Overrides:

prepareVersioned in class HqlSqlBaseWalker

Throws:

antlr.SemanticException

prepareLogicOperator

protected void prepareLogicOperator(antlr.collections.AST operator)
                             throws antlr.SemanticException

Overrides:

prepareLogicOperator in class HqlSqlBaseWalker

Throws:

antlr.SemanticException

prepareArithmeticOperator

protected void prepareArithmeticOperator(antlr.collections.AST operator)
                                  throws antlr.SemanticException

Overrides:

prepareArithmeticOperator in class HqlSqlBaseWalker

Throws:

antlr.SemanticException

panic

public static void panic()