[hibernate-commits] Hibernate SVN: r10252 - branches/Branch_3_2/Hibernate3/src/org/hibernate/dialect
hibernate-commits at lists.jboss.org
hibernate-commits at lists.jboss.org
Fri Aug 11 15:44:48 EDT 2006
Author: steve.ebersole at jboss.com
Date: 2006-08-11 15:44:32 -0400 (Fri, 11 Aug 2006)
New Revision: 10252
Modified:
branches/Branch_3_2/Hibernate3/src/org/hibernate/dialect/SQLServerDialect.java
Log:
utilize combined trim emulation function template from sqlserver dialect
Modified: branches/Branch_3_2/Hibernate3/src/org/hibernate/dialect/SQLServerDialect.java
===================================================================
--- branches/Branch_3_2/Hibernate3/src/org/hibernate/dialect/SQLServerDialect.java 2006-08-11 19:41:36 UTC (rev 10251)
+++ branches/Branch_3_2/Hibernate3/src/org/hibernate/dialect/SQLServerDialect.java 2006-08-11 19:44:32 UTC (rev 10252)
@@ -2,18 +2,12 @@
package org.hibernate.dialect;
import java.sql.Types;
-import java.util.List;
-import java.util.ArrayList;
import org.hibernate.Hibernate;
import org.hibernate.LockMode;
-import org.hibernate.QueryException;
-import org.hibernate.engine.Mapping;
-import org.hibernate.engine.SessionFactoryImplementor;
-import org.hibernate.type.Type;
import org.hibernate.dialect.function.SQLFunctionTemplate;
import org.hibernate.dialect.function.StandardSQLFunction;
-import org.hibernate.dialect.function.SQLFunction;
+import org.hibernate.dialect.function.AnsiTrimEmulationFunction;
/**
* A dialect for Microsoft SQL Server 2000
@@ -31,10 +25,11 @@
registerFunction( "locate", new StandardSQLFunction("charindex", Hibernate.INTEGER) );
registerFunction( "extract", new SQLFunctionTemplate( Hibernate.INTEGER, "datepart(?1, ?3)" ) );
- registerFunction( "trim", new TrimFunction() );
registerFunction( "mod", new SQLFunctionTemplate( Hibernate.INTEGER, "?1 % ?2" ) );
registerFunction( "bit_length", new SQLFunctionTemplate( Hibernate.INTEGER, "datalength(?1) * 8" ) );
+ registerFunction( "trim", new AnsiTrimEmulationFunction() );
+
registerKeyword("top");
}
@@ -108,134 +103,4 @@
public String getCurrentTimestampSelectString() {
return "select current_timestamp";
}
-
- /**
- * A SQLServer-specific version of the ANSI-SQL trim function as SQLServer
- * does not support such a thing.
- */
- public static class TrimFunction implements SQLFunction {
- private static final SQLFunction LEADING_SPACE_TRIM = new SQLFunctionTemplate( Hibernate.STRING, "ltrim( ?1 )");
- private static final SQLFunction TRAILING_SPACE_TRIM = new SQLFunctionTemplate( Hibernate.STRING, "rtrim( ?1 )");
- private static final SQLFunction BOTH_SPACE_TRIM = new SQLFunctionTemplate( Hibernate.STRING, "ltrim( rtrim( ?1 ) )");
- private static final SQLFunction BOTH_SPACE_TRIM_FROM = new SQLFunctionTemplate( Hibernate.STRING, "ltrim( rtrim( ?2 ) )");
-
- private static final SQLFunction LEADING_TRIM = new SQLFunctionTemplate( Hibernate.STRING, "replace( replace( rtrim( replace( replace( ?1, ' ', '${space}$' ), ?2, ' ' ) ), ' ', ?2 ), '${space}$', ' ' )" );
- private static final SQLFunction TRAILING_TRIM = new SQLFunctionTemplate( Hibernate.STRING, "replace( replace( ltrim( replace( replace( ?1, ' ', '${space}$' ), ?2, ' ' ) ), ' ', ?2 ), '${space}$', ' ' )" );
- private static final SQLFunction BOTH_TRIM = new SQLFunctionTemplate( Hibernate.STRING, "replace( replace( ltrim( rtrim( replace( replace( ?1, ' ', '${space}$' ), ?2, ' ' ) ) ), ' ', ?2 ), '${space}$', ' ' )" );
-
- public Type getReturnType(Type columnType, Mapping mapping) throws QueryException {
- return Hibernate.STRING;
- }
-
- public boolean hasArguments() {
- return true;
- }
-
- public boolean hasParenthesesIfNoArguments() {
- return false;
- }
-
- public String render(List args, SessionFactoryImplementor factory) throws QueryException {
- // according to both the ANSI-SQL and EJB3 specs, trim can either take
- // exactly one parameter or a variable number of parameters between 1 and 4.
- // from the SQL spec:
- //
- // <trim function> ::=
- // TRIM <left paren> <trim operands> <right paren>
- //
- // <trim operands> ::=
- // [ [ <trim specification> ] [ <trim character> ] FROM ] <trim source>
- //
- // <trim specification> ::=
- // LEADING
- // | TRAILING
- // | BOTH
- //
- // If only <trim specification> is omitted, BOTH is assumed;
- // if <trim character> is omitted, space is assumed
- if ( args.size() == 1 ) {
- // we have the form: trim(trimSource)
- // so we trim leading and trailing spaces
- return BOTH_SPACE_TRIM.render( args, factory );
- }
- else if ( "from".equalsIgnoreCase( ( String ) args.get( 0 ) ) ) {
- // we have the form: trim(from trimSource).
- // This is functionally equivalent to trim(trimSource)
- return BOTH_SPACE_TRIM_FROM.render( args, factory );
- }
- else {
- // otherwise, a trim-specification and/or a trim-character
- // have been specified; we need to decide which options
- // are present and "do the right thing"
- boolean leading = true; // should leading trim-characters be trimmed?
- boolean trailing = true; // should trailing trim-characters be trimmed?
- String trimCharacter = null; // the trim-character
- String trimSource = null; // the trim-source
-
- // potentialTrimCharacterArgIndex = 1 assumes that a
- // trim-specification has been specified. we handle the
- // exception to that explicitly
- int potentialTrimCharacterArgIndex = 1;
- String firstArg = ( String ) args.get( 0 );
- if ( "leading".equalsIgnoreCase( firstArg ) ) {
- trailing = false;
- }
- else if ( "trailing".equalsIgnoreCase( firstArg ) ) {
- leading = false;
- }
- else if ( "both".equalsIgnoreCase( firstArg ) ) {
- }
- else {
- potentialTrimCharacterArgIndex = 0;
- }
-
- String potentialTrimCharacter = ( String ) args.get( potentialTrimCharacterArgIndex );
- if ( "from".equalsIgnoreCase( potentialTrimCharacter ) ) {
- trimCharacter = "' '";
- trimSource = ( String ) args.get( potentialTrimCharacterArgIndex + 1 );
- }
- else if ( potentialTrimCharacterArgIndex + 1 >= args.size() ) {
- trimCharacter = "' '";
- trimSource = potentialTrimCharacter;
- }
- else {
- trimCharacter = potentialTrimCharacter;
- if ( "from".equalsIgnoreCase( ( String ) args.get( potentialTrimCharacterArgIndex + 1 ) ) ) {
- trimSource = ( String ) args.get( potentialTrimCharacterArgIndex + 2 );
- }
- else {
- trimSource = ( String ) args.get( potentialTrimCharacterArgIndex + 1 );
- }
- }
-
- List argsToUse = null;
- argsToUse = new ArrayList();
- argsToUse.add( trimSource );
- argsToUse.add( trimCharacter );
-
- if ( trimCharacter.equals( "' '" ) ) {
- if ( leading && trailing ) {
- return BOTH_SPACE_TRIM.render( argsToUse, factory );
- }
- else if ( leading ) {
- return LEADING_SPACE_TRIM.render( argsToUse, factory );
- }
- else {
- return TRAILING_SPACE_TRIM.render( argsToUse, factory );
- }
- }
- else {
- if ( leading && trailing ) {
- return BOTH_TRIM.render( argsToUse, factory );
- }
- else if ( leading ) {
- return LEADING_TRIM.render( argsToUse, factory );
- }
- else {
- return TRAILING_TRIM.render( argsToUse, factory );
- }
- }
- }
- }
- }
}
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