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Example 1 with CaseBooleanExpression

use of org.datanucleus.store.rdbms.sql.expression.CaseBooleanExpression in project datanucleus-rdbms by datanucleus.

the class OptionalOrElseMethod method getExpression.

/* (non-Javadoc)
     * @see org.datanucleus.store.rdbms.sql.method.SQLMethod#getExpression(org.datanucleus.store.rdbms.sql.expression.SQLExpression, java.util.List)
     */
public SQLExpression getExpression(SQLStatement stmt, SQLExpression expr, List<SQLExpression> args) {
    if (args == null || args.size() != 1) {
        throw new NucleusException("Optional.orElse should be passed 1 argument");
    }
    SQLExpression elseExpr = args.get(0);
    SQLExpressionFactory exprFactory = stmt.getSQLExpressionFactory();
    OptionalMapping opMapping = (OptionalMapping) ((OptionalExpression) expr).getJavaTypeMapping();
    JavaTypeMapping javaMapping = opMapping.getWrappedMapping();
    SQLExpression getExpr = exprFactory.newExpression(stmt, expr.getSQLTable(), javaMapping);
    SQLExpression isNotNullExpr = exprFactory.newExpression(stmt, expr.getSQLTable(), javaMapping).ne(new NullLiteral(stmt, javaMapping, null, null));
    if (javaMapping instanceof StringMapping) {
        return new CaseStringExpression(new SQLExpression[] { isNotNullExpr }, new SQLExpression[] { getExpr }, elseExpr);
    } else if (javaMapping instanceof IntegerMapping || javaMapping instanceof LongMapping || javaMapping instanceof ShortMapping || javaMapping instanceof FloatMapping || javaMapping instanceof DoubleMapping || javaMapping instanceof BigIntegerMapping || javaMapping instanceof BigDecimalMapping) // TODO Maybe use javaMapping.getJavaType compared to Number to avoid the check above
    {
        return new CaseNumericExpression(new SQLExpression[] { isNotNullExpr }, new SQLExpression[] { getExpr }, elseExpr);
    } else if (javaMapping instanceof BooleanMapping) {
        return new CaseBooleanExpression(new SQLExpression[] { isNotNullExpr }, new SQLExpression[] { getExpr }, elseExpr);
    }
    return new CaseExpression(new SQLExpression[] { isNotNullExpr }, new SQLExpression[] { getExpr }, elseExpr);
}
Also used : SQLExpressionFactory(org.datanucleus.store.rdbms.sql.expression.SQLExpressionFactory) SQLExpression(org.datanucleus.store.rdbms.sql.expression.SQLExpression) BigDecimalMapping(org.datanucleus.store.rdbms.mapping.java.BigDecimalMapping) JavaTypeMapping(org.datanucleus.store.rdbms.mapping.java.JavaTypeMapping) CaseNumericExpression(org.datanucleus.store.rdbms.sql.expression.CaseNumericExpression) StringMapping(org.datanucleus.store.rdbms.mapping.java.StringMapping) BigIntegerMapping(org.datanucleus.store.rdbms.mapping.java.BigIntegerMapping) IntegerMapping(org.datanucleus.store.rdbms.mapping.java.IntegerMapping) BooleanMapping(org.datanucleus.store.rdbms.mapping.java.BooleanMapping) DoubleMapping(org.datanucleus.store.rdbms.mapping.java.DoubleMapping) OptionalMapping(org.datanucleus.store.rdbms.mapping.java.OptionalMapping) ShortMapping(org.datanucleus.store.rdbms.mapping.java.ShortMapping) CaseExpression(org.datanucleus.store.rdbms.sql.expression.CaseExpression) CaseStringExpression(org.datanucleus.store.rdbms.sql.expression.CaseStringExpression) LongMapping(org.datanucleus.store.rdbms.mapping.java.LongMapping) BigIntegerMapping(org.datanucleus.store.rdbms.mapping.java.BigIntegerMapping) FloatMapping(org.datanucleus.store.rdbms.mapping.java.FloatMapping) CaseBooleanExpression(org.datanucleus.store.rdbms.sql.expression.CaseBooleanExpression) NucleusException(org.datanucleus.exceptions.NucleusException) NullLiteral(org.datanucleus.store.rdbms.sql.expression.NullLiteral)

Aggregations

NucleusException (org.datanucleus.exceptions.NucleusException)1 BigDecimalMapping (org.datanucleus.store.rdbms.mapping.java.BigDecimalMapping)1 BigIntegerMapping (org.datanucleus.store.rdbms.mapping.java.BigIntegerMapping)1 BooleanMapping (org.datanucleus.store.rdbms.mapping.java.BooleanMapping)1 DoubleMapping (org.datanucleus.store.rdbms.mapping.java.DoubleMapping)1 FloatMapping (org.datanucleus.store.rdbms.mapping.java.FloatMapping)1 IntegerMapping (org.datanucleus.store.rdbms.mapping.java.IntegerMapping)1 JavaTypeMapping (org.datanucleus.store.rdbms.mapping.java.JavaTypeMapping)1 LongMapping (org.datanucleus.store.rdbms.mapping.java.LongMapping)1 OptionalMapping (org.datanucleus.store.rdbms.mapping.java.OptionalMapping)1 ShortMapping (org.datanucleus.store.rdbms.mapping.java.ShortMapping)1 StringMapping (org.datanucleus.store.rdbms.mapping.java.StringMapping)1 CaseBooleanExpression (org.datanucleus.store.rdbms.sql.expression.CaseBooleanExpression)1 CaseExpression (org.datanucleus.store.rdbms.sql.expression.CaseExpression)1 CaseNumericExpression (org.datanucleus.store.rdbms.sql.expression.CaseNumericExpression)1 CaseStringExpression (org.datanucleus.store.rdbms.sql.expression.CaseStringExpression)1 NullLiteral (org.datanucleus.store.rdbms.sql.expression.NullLiteral)1 SQLExpression (org.datanucleus.store.rdbms.sql.expression.SQLExpression)1 SQLExpressionFactory (org.datanucleus.store.rdbms.sql.expression.SQLExpressionFactory)1