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/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* License: GNU Lesser General Public License (LGPL), version 2.1 or later.
* See the lgpl.txt file in the root directory or .
*/
package org.hibernate.query.criteria.internal.expression.function;
import java.util.Arrays;
import java.util.List;
import java.util.Locale;
import javax.persistence.criteria.Expression;
import org.hibernate.query.criteria.internal.CriteriaBuilderImpl;
import org.hibernate.query.criteria.internal.ParameterContainer;
import org.hibernate.query.criteria.internal.ParameterRegistry;
import org.hibernate.query.criteria.internal.Renderable;
import org.hibernate.query.criteria.internal.compile.RenderingContext;
/**
* Support for functions with parameters.
*
* @author Steve Ebersole
*/
public class ParameterizedFunctionExpression
extends BasicFunctionExpression
implements FunctionExpression {
public static List STANDARD_JPA_FUNCTION_NAMES = Arrays.asList(
// 4.6.17.2.1
"CONCAT",
"SUBSTRING",
"TRIM",
"UPPER",
"LOWER",
"LOCATE",
"LENGTH",
//4.6.17.2.2
"ABS",
"SQRT",
"MOD",
"SIZE",
"INDEX",
// 4.6.17.2.3
"CURRENT_DATE",
"CURRENT_TIME",
"CURRENT_TIMESTAMP"
);
private final List> argumentExpressions;
private final boolean isStandardJpaFunction;
public ParameterizedFunctionExpression(
CriteriaBuilderImpl criteriaBuilder,
Class javaType,
String functionName,
List> argumentExpressions) {
super( criteriaBuilder, javaType, functionName );
this.argumentExpressions = argumentExpressions;
this.isStandardJpaFunction = STANDARD_JPA_FUNCTION_NAMES.contains( functionName.toUpperCase(Locale.ROOT) );
}
public ParameterizedFunctionExpression(
CriteriaBuilderImpl criteriaBuilder,
Class javaType,
String functionName,
Expression... argumentExpressions) {
super( criteriaBuilder, javaType, functionName );
this.argumentExpressions = Arrays.asList( argumentExpressions );
this.isStandardJpaFunction = STANDARD_JPA_FUNCTION_NAMES.contains( functionName.toUpperCase(Locale.ROOT) );
}
protected boolean isStandardJpaFunction() {
return isStandardJpaFunction;
}
protected static int properSize(int number) {
return number + (int)( number*.75 ) + 1;
}
public List> getArgumentExpressions() {
return argumentExpressions;
}
@Override
public void registerParameters(ParameterRegistry registry) {
for ( Expression argument : getArgumentExpressions() ) {
if ( ParameterContainer.class.isInstance( argument ) ) {
( (ParameterContainer) argument ).registerParameters(registry);
}
}
}
@Override
public String render(RenderingContext renderingContext) {
StringBuilder buffer = new StringBuilder();
if ( isStandardJpaFunction() ) {
buffer.append( getFunctionName() )
.append( "(" );
}
else {
buffer.append( "function('" )
.append( getFunctionName() )
.append( "', " );
}
renderArguments( buffer, renderingContext );
buffer.append( ')' );
return buffer.toString();
}
protected void renderArguments(StringBuilder buffer, RenderingContext renderingContext) {
String sep = "";
for ( Expression argument : argumentExpressions ) {
buffer.append( sep ).append( ( (Renderable) argument ).render( renderingContext ) );
sep = ", ";
}
}
}