Examples with StringExpression org.datanucleus.store.rdbms.sql.expression.StringExpression used on opensource projects

Example 41 with StringExpression

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

the class StringTrim3Method 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("TRIM has incorrect number of args");
    }
    // {stringExpr}.trim(trimChar)
    SQLExpression trimCharExpr = null;
    if (args != null && args.size() > 0) {
        trimCharExpr = args.get(0);
    }
    List trimArgs = new ArrayList();
    if (trimCharExpr == null) {
        trimArgs.add(expr);
    } else {
        StringExpression argExpr = new StringExpression(stmt, expr.getJavaTypeMapping(), "NULL", null);
        SQLText sql = argExpr.toSQLText();
        sql.clearStatement();
        sql.append(getTrimSpecKeyword() + " ");
        sql.append(trimCharExpr);
        sql.append(" FROM ");
        sql.append(expr);
        trimArgs.add(argExpr);
    }
    StringExpression trimExpr = new StringExpression(stmt, expr.getJavaTypeMapping(), "TRIM", trimArgs);
    return trimExpr;
}

Example 42 with StringExpression

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

the class StringStartsWith2Method 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() == 0 || args.size() > 2) {
        throw new NucleusException(Localiser.msg("060003", "startsWith", "StringExpression", 0, "StringExpression/CharacterExpression/Parameter"));
    }
    // {stringExpr}.indexOf(strExpr1 [,numExpr2])
    SQLExpression one = ExpressionUtils.getLiteralForOne(stmt);
    ArrayList funcArgs = new ArrayList();
    SQLExpression substrExpr = args.get(0);
    if (!(substrExpr instanceof StringExpression) && !(substrExpr instanceof CharacterExpression) && !(substrExpr instanceof ParameterLiteral)) {
        throw new NucleusException(Localiser.msg("060003", "startsWith", "StringExpression", 0, "StringExpression/CharacterExpression/Parameter"));
    }
    if (args.size() == 2) {
        NumericExpression numExpr = (NumericExpression) args.get(1);
        funcArgs.add(substrExpr);
        funcArgs.add(expr);
        return new BooleanExpression(new StringExpression(stmt, stmt.getSQLExpressionFactory().getMappingForType(int.class), "CHARINDEX", funcArgs), Expression.OP_EQ, one.add(numExpr));
    }
    funcArgs.add(substrExpr);
    funcArgs.add(expr);
    return new BooleanExpression(new StringExpression(stmt, stmt.getSQLExpressionFactory().getMappingForType(int.class), "CHARINDEX", funcArgs), Expression.OP_EQ, one);
}

Example 43 with StringExpression

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

the class CollectionContainsMethod 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() == 0 || args.size() > 1) {
        throw new NucleusException(Localiser.msg("060016", "contains", "CollectionExpression", 1));
    }
    CollectionExpression collExpr = (CollectionExpression) expr;
    AbstractMemberMetaData mmd = collExpr.getJavaTypeMapping().getMemberMetaData();
    SQLExpression elemExpr = args.get(0);
    SQLExpressionFactory exprFactory = stmt.getSQLExpressionFactory();
    if (elemExpr.isParameter()) {
        // Element is a parameter so make sure its type is set
        if (mmd != null && mmd.getCollection() != null) {
            Class elementCls = stmt.getQueryGenerator().getClassLoaderResolver().classForName(mmd.getCollection().getElementType());
            stmt.getQueryGenerator().bindParameter(elemExpr.getParameterName(), elementCls);
        }
    }
    ClassLoaderResolver clr = stmt.getQueryGenerator().getClassLoaderResolver();
    if (collExpr instanceof CollectionLiteral) {
        // Literal collection
        CollectionLiteral lit = (CollectionLiteral) collExpr;
        Collection coll = (Collection) lit.getValue();
        JavaTypeMapping m = exprFactory.getMappingForType(boolean.class, true);
        if (coll == null || coll.isEmpty()) {
            return exprFactory.newLiteral(stmt, m, true).eq(exprFactory.newLiteral(stmt, m, false));
        }
        if (collExpr.isParameter()) {
            stmt.getQueryGenerator().useParameterExpressionAsLiteral((CollectionLiteral) collExpr);
        }
        boolean useInExpression = false;
        List<SQLExpression> collElementExprs = lit.getElementExpressions();
        if (collElementExprs != null && !collElementExprs.isEmpty()) {
            // Make sure the the collection element(s) are compatible with the elemExpr
            boolean incompatible = true;
            Class elemtype = clr.classForName(elemExpr.getJavaTypeMapping().getType());
            Iterator<SQLExpression> collElementExprIter = collElementExprs.iterator();
            while (collElementExprIter.hasNext()) {
                SQLExpression collElementExpr = collElementExprIter.next();
                Class collElemType = clr.classForName(collElementExpr.getJavaTypeMapping().getType());
                if (elementTypeCompatible(elemtype, collElemType)) {
                    incompatible = false;
                    break;
                }
            }
            if (incompatible) {
                // The provided element type isn't assignable to any of the input collection elements!
                return exprFactory.newLiteral(stmt, m, true).eq(exprFactory.newLiteral(stmt, m, false));
            }
            // Check if we should compare using an "IN (...)" expression
            SQLExpression collElementExpr = collElementExprs.get(0);
            if (collElementExpr instanceof StringExpression || collElementExpr instanceof NumericExpression || collElementExpr instanceof TemporalExpression || collElementExpr instanceof CharacterExpression || collElementExpr instanceof EnumExpression) {
                useInExpression = true;
            }
        }
        if (useInExpression) {
            // Return "elem IN (val1, val2, ...)"
            SQLExpression[] exprs = (collElementExprs != null ? collElementExprs.toArray(new SQLExpression[collElementExprs.size()]) : null);
            return new InExpression(elemExpr, exprs);
        }
        // Return "elem == val1 || elem == val2 || elem == val3 ..."
        BooleanExpression bExpr = null;
        if (collElementExprs != null) {
            for (int i = 0; i < collElementExprs.size(); i++) {
                if (bExpr == null) {
                    bExpr = (collElementExprs.get(i)).eq(elemExpr);
                } else {
                    bExpr = bExpr.ior((collElementExprs.get(i)).eq(elemExpr));
                }
            }
        }
        if (bExpr != null) {
            bExpr.encloseInParentheses();
        }
        return bExpr;
    }
    if (mmd == null) {
        throw new NucleusUserException("Cannot perform Collection.contains when the field metadata is not provided");
    }
    if (mmd.isSerialized()) {
        throw new NucleusUserException("Cannot perform Collection.contains when the collection is being serialised");
    }
    ApiAdapter api = stmt.getRDBMSManager().getApiAdapter();
    Class elementType = clr.classForName(mmd.getCollection().getElementType());
    if (!api.isPersistable(elementType) && mmd.getJoinMetaData() == null) {
        throw new NucleusUserException("Cannot perform Collection.contains when the collection<Non-Persistable> is not in a join table");
    }
    if (stmt.getQueryGenerator().getCompilationComponent() == CompilationComponent.FILTER) {
        boolean useSubquery = getNeedsSubquery(stmt, collExpr, elemExpr);
        JoinType joinType = JoinType.INNER_JOIN;
        if (elemExpr instanceof UnboundExpression) {
            // See if the user has defined what should be used
            String varName = ((UnboundExpression) elemExpr).getVariableName();
            String extensionName = "datanucleus.query.jdoql." + varName + ".join";
            String extensionValue = (String) stmt.getQueryGenerator().getValueForExtension(extensionName);
            if (extensionValue != null) {
                if (extensionValue.equalsIgnoreCase("SUBQUERY")) {
                    useSubquery = true;
                } else if (extensionValue.equalsIgnoreCase("INNERJOIN")) {
                    useSubquery = false;
                } else if (extensionValue.equalsIgnoreCase("LEFTOUTERJOIN")) {
                    joinType = JoinType.LEFT_OUTER_JOIN;
                }
            }
        }
        if (useSubquery) {
            return containsAsSubquery(stmt, collExpr, elemExpr);
        }
        return containsAsJoin(stmt, collExpr, elemExpr, joinType);
    }
    return containsAsSubquery(stmt, collExpr, elemExpr);
}