Examples with PrimaryExpression org.datanucleus.query.expression.PrimaryExpression used on opensource projects

Example 26 with PrimaryExpression

use of org.datanucleus.query.expression.PrimaryExpression in project datanucleus-core by datanucleus.

the class JPQLQueryHelper method getJPQLForExpression.

/**
 * Convenience method to return the JPQL single-string query text for the provided expression.
 * @param expr The expression
 * @return The JPQL single-string text that equates to this expression
 */
public static String getJPQLForExpression(Expression expr) {
    if (expr instanceof DyadicExpression) {
        DyadicExpression dyExpr = (DyadicExpression) expr;
        Expression left = dyExpr.getLeft();
        Expression right = dyExpr.getRight();
        StringBuilder str = new StringBuilder("(");
        if (left != null) {
            str.append(JPQLQueryHelper.getJPQLForExpression(left));
        }
        // Special cases
        if (right != null && right instanceof Literal && ((Literal) right).getLiteral() == null && (dyExpr.getOperator() == Expression.OP_EQ || dyExpr.getOperator() == Expression.OP_NOTEQ)) {
            str.append(dyExpr.getOperator() == Expression.OP_EQ ? " IS NULL" : " IS NOT NULL");
        } else {
            if (dyExpr.getOperator() == Expression.OP_AND) {
                str.append(" AND ");
            } else if (dyExpr.getOperator() == Expression.OP_OR) {
                str.append(" OR ");
            } else if (dyExpr.getOperator() == Expression.OP_ADD) {
                str.append(" + ");
            } else if (dyExpr.getOperator() == Expression.OP_SUB) {
                str.append(" - ");
            } else if (dyExpr.getOperator() == Expression.OP_MUL) {
                str.append(" * ");
            } else if (dyExpr.getOperator() == Expression.OP_DIV) {
                str.append(" / ");
            } else if (dyExpr.getOperator() == Expression.OP_EQ) {
                str.append(" = ");
            } else if (dyExpr.getOperator() == Expression.OP_GT) {
                str.append(" > ");
            } else if (dyExpr.getOperator() == Expression.OP_LT) {
                str.append(" < ");
            } else if (dyExpr.getOperator() == Expression.OP_GTEQ) {
                str.append(" >= ");
            } else if (dyExpr.getOperator() == Expression.OP_LTEQ) {
                str.append(" <= ");
            } else if (dyExpr.getOperator() == Expression.OP_NOTEQ) {
                str.append(" <> ");
            } else {
                // TODO Support other operators
                throw new UnsupportedOperationException("Dont currently support operator " + dyExpr.getOperator() + " in JPQL conversion");
            }
            if (right != null) {
                str.append(JPQLQueryHelper.getJPQLForExpression(right));
            }
        }
        str.append(")");
        return str.toString();
    } else if (expr instanceof PrimaryExpression) {
        PrimaryExpression primExpr = (PrimaryExpression) expr;
        return primExpr.getId();
    } else if (expr instanceof ParameterExpression) {
        ParameterExpression paramExpr = (ParameterExpression) expr;
        if (paramExpr.getId() != null) {
            return ":" + paramExpr.getId();
        }
        return "?" + paramExpr.getPosition();
    } else if (expr instanceof InvokeExpression) {
        InvokeExpression invExpr = (InvokeExpression) expr;
        Expression invoked = invExpr.getLeft();
        List<Expression> args = invExpr.getArguments();
        String method = invExpr.getOperation();
        if (method.equalsIgnoreCase("CURRENT_DATE")) {
            return "CURRENT_DATE";
        } else if (method.equalsIgnoreCase("CURRENT_TIME")) {
            return "CURRENT_TIME";
        } else if (method.equalsIgnoreCase("CURRENT_TIMESTAMP")) {
            return "CURRENT_TIMESTAMP";
        } else if (method.equalsIgnoreCase("length")) {
            StringBuilder str = new StringBuilder("LENGTH(");
            str.append(JPQLQueryHelper.getJPQLForExpression(invoked));
            if (args != null && !args.isEmpty()) {
                Expression firstExpr = args.get(0);
                str.append(",").append(JPQLQueryHelper.getJPQLForExpression(firstExpr));
                if (args.size() == 2) {
                    Expression secondExpr = args.get(1);
                    str.append(",").append(JPQLQueryHelper.getJPQLForExpression(secondExpr));
                }
            }
            str.append(")");
            return str.toString();
        } else if (method.equals("toLowerCase")) {
            return "LOWER(" + JPQLQueryHelper.getJPQLForExpression(invoked) + ")";
        } else if (method.equals("toUpperCase")) {
            return "UPPER(" + JPQLQueryHelper.getJPQLForExpression(invoked) + ")";
        } else if (method.equalsIgnoreCase("isEmpty")) {
            StringBuilder str = new StringBuilder();
            str.append(JPQLQueryHelper.getJPQLForExpression(invoked));
            str.append(" IS EMPTY");
            return str.toString();
        } else if (method.equalsIgnoreCase("indexOf")) {
            StringBuilder str = new StringBuilder("LOCATE(");
            str.append(JPQLQueryHelper.getJPQLForExpression(invoked));
            if (args != null && !args.isEmpty()) {
                Expression firstExpr = args.get(0);
                str.append(",").append(JPQLQueryHelper.getJPQLForExpression(firstExpr));
                if (args.size() > 1) {
                    Expression secondExpr = args.get(1);
                    str.append(",").append(JPQLQueryHelper.getJPQLForExpression(secondExpr));
                }
            }
            str.append(")");
            return str.toString();
        } else if (method.equalsIgnoreCase("substring")) {
            StringBuilder str = new StringBuilder("SUBSTRING(");
            str.append(JPQLQueryHelper.getJPQLForExpression(invoked));
            if (args != null && !args.isEmpty()) {
                Expression firstExpr = args.get(0);
                str.append(",").append(JPQLQueryHelper.getJPQLForExpression(firstExpr));
                if (args.size() > 1) {
                    Expression secondExpr = args.get(1);
                    str.append(",").append(JPQLQueryHelper.getJPQLForExpression(secondExpr));
                }
            }
            str.append(")");
            return str.toString();
        } else if (method.equalsIgnoreCase("trim")) {
            StringBuilder str = new StringBuilder("TRIM(BOTH ");
            str.append(JPQLQueryHelper.getJPQLForExpression(invoked));
            if (args != null && !args.isEmpty()) {
                Expression trimChrExpr = args.get(0);
                str.append(JPQLQueryHelper.getJPQLForExpression(trimChrExpr));
            }
            str.append(" FROM ");
            str.append(JPQLQueryHelper.getJPQLForExpression(invoked));
            str.append(")");
            return str.toString();
        } else if (method.equalsIgnoreCase("trimLeft")) {
            StringBuilder str = new StringBuilder("TRIM(LEADING ");
            str.append(JPQLQueryHelper.getJPQLForExpression(invoked));
            if (args != null && !args.isEmpty()) {
                Expression trimChrExpr = args.get(0);
                str.append(JPQLQueryHelper.getJPQLForExpression(trimChrExpr));
            }
            str.append(" FROM ");
            str.append(JPQLQueryHelper.getJPQLForExpression(invoked));
            str.append(")");
            return str.toString();
        } else if (method.equalsIgnoreCase("trimRight")) {
            StringBuilder str = new StringBuilder("TRIM(TRAILING ");
            str.append(JPQLQueryHelper.getJPQLForExpression(invoked));
            if (args != null && !args.isEmpty()) {
                Expression trimChrExpr = args.get(0);
                str.append(JPQLQueryHelper.getJPQLForExpression(trimChrExpr));
            }
            str.append(" FROM ");
            str.append(JPQLQueryHelper.getJPQLForExpression(invoked));
            str.append(")");
            return str.toString();
        } else if (method.equalsIgnoreCase("matches")) {
            if (args == null || args.isEmpty()) {
                throw new NucleusUserException("Cannot use 'matches' without an argument");
            }
            StringBuilder str = new StringBuilder();
            str.append(JPQLQueryHelper.getJPQLForExpression(invoked));
            str.append(" LIKE ");
            Expression firstExpr = args.get(0);
            str.append(JPQLQueryHelper.getJPQLForExpression(firstExpr));
            if (args != null && args.size() > 1) {
                Expression secondExpr = args.get(1);
                str.append(" ESCAPE ").append(JPQLQueryHelper.getJPQLForExpression(secondExpr));
            }
            return str.toString();
        } else if (method.equalsIgnoreCase("contains")) {
            StringBuilder str = new StringBuilder();
            if (args == null || args.isEmpty()) {
                throw new NucleusUserException("Cannot use 'contains' without an argument");
            }
            Expression firstExpr = args.get(0);
            str.append(JPQLQueryHelper.getJPQLForExpression(firstExpr));
            str.append(" MEMBER OF ");
            str.append(JPQLQueryHelper.getJPQLForExpression(invoked));
            return str.toString();
        } else if (method.equalsIgnoreCase("COUNT")) {
            if (args == null || args.isEmpty()) {
                throw new NucleusUserException("Cannot use 'COUNT' without an argument");
            }
            Expression argExpr = args.get(0);
            if (argExpr instanceof DyadicExpression && ((DyadicExpression) argExpr).getOperator() == Expression.OP_DISTINCT) {
                DyadicExpression dyExpr = (DyadicExpression) argExpr;
                return "COUNT(DISTINCT " + JPQLQueryHelper.getJPQLForExpression(dyExpr.getLeft()) + ")";
            }
            return "COUNT(" + JPQLQueryHelper.getJPQLForExpression(argExpr) + ")";
        } else if (method.equalsIgnoreCase("COALESCE")) {
            StringBuilder str = new StringBuilder("COALESCE(");
            if (args != null && !args.isEmpty()) {
                for (int i = 0; i < args.size(); i++) {
                    Expression argExpr = args.get(i);
                    str.append(JPQLQueryHelper.getJPQLForExpression(argExpr));
                    if (i < args.size() - 1) {
                        str.append(",");
                    }
                }
            }
            str.append(")");
            return str.toString();
        } else if (method.equalsIgnoreCase("NULLIF")) {
            StringBuilder str = new StringBuilder("NULLIF(");
            if (args != null && !args.isEmpty()) {
                for (int i = 0; i < args.size(); i++) {
                    Expression argExpr = args.get(i);
                    str.append(JPQLQueryHelper.getJPQLForExpression(argExpr));
                    if (i < args.size() - 1) {
                        str.append(",");
                    }
                }
            }
            str.append(")");
            return str.toString();
        } else if (method.equalsIgnoreCase("ABS")) {
            String argExprStr = (args != null && !args.isEmpty()) ? JPQLQueryHelper.getJPQLForExpression(args.get(0)) : "";
            return "ABS(" + argExprStr + ")";
        } else if (method.equalsIgnoreCase("AVG")) {
            String argExprStr = (args != null && !args.isEmpty()) ? JPQLQueryHelper.getJPQLForExpression(args.get(0)) : "";
            return "AVG(" + argExprStr + ")";
        } else if (method.equalsIgnoreCase("MAX")) {
            String argExprStr = (args != null && !args.isEmpty()) ? JPQLQueryHelper.getJPQLForExpression(args.get(0)) : "";
            return "MAX(" + argExprStr + ")";
        } else if (method.equalsIgnoreCase("MIN")) {
            String argExprStr = (args != null && !args.isEmpty()) ? JPQLQueryHelper.getJPQLForExpression(args.get(0)) : "";
            return "MIN(" + argExprStr + ")";
        } else if (method.equalsIgnoreCase("SQRT")) {
            String argExprStr = (args != null && !args.isEmpty()) ? JPQLQueryHelper.getJPQLForExpression(args.get(0)) : "";
            return "SQRT(" + argExprStr + ")";
        } else if (method.equalsIgnoreCase("SUM")) {
            String argExprStr = (args != null && !args.isEmpty()) ? JPQLQueryHelper.getJPQLForExpression(args.get(0)) : "";
            return "SUM(" + argExprStr + ")";
        }
        // TODO Support this
        throw new UnsupportedOperationException("Dont currently support InvokeExpression (" + invExpr + ") conversion into JPQL");
    } else if (expr instanceof Literal) {
        Literal litExpr = (Literal) expr;
        Object value = litExpr.getLiteral();
        if (value instanceof String || value instanceof Character) {
            return "'" + value.toString() + "'";
        } else if (value instanceof Boolean) {
            return (Boolean) value ? "TRUE" : "FALSE";
        } else {
            return litExpr.getLiteral().toString();
        }
    } else if (expr instanceof VariableExpression) {
        VariableExpression varExpr = (VariableExpression) expr;
        return varExpr.getId();
    } else {
        throw new UnsupportedOperationException("Dont currently support " + expr.getClass().getName() + " in JPQLQueryHelper");
    }
}

Example 27 with PrimaryExpression

use of org.datanucleus.query.expression.PrimaryExpression in project datanucleus-core by datanucleus.

the class VarThisCompilationOptimiser method replaceVariableWithCandidateInExpression.

/**
 * Method that replaces any occurrence of the specified variable in the provided expression with the
 * candidate primary expression. Recurses to sub-expressions.
 * @param varName Variable name
 * @param expr The expression to update
 * @return Updated expression
 */
private Expression replaceVariableWithCandidateInExpression(String varName, Expression expr) {
    if (expr == null) {
        return null;
    }
    if (expr instanceof VariableExpression && ((VariableExpression) expr).getId().equals(varName)) {
        List<String> tuples = new ArrayList<String>();
        tuples.add(compilation.getCandidateAlias());
        Expression replExpr = new PrimaryExpression(tuples);
        replExpr.bind(compilation.getSymbolTable());
        return replExpr;
    } else if (expr instanceof DyadicExpression) {
        DyadicExpression dyExpr = (DyadicExpression) expr;
        if (dyExpr.getLeft() != null) {
            dyExpr.setLeft(replaceVariableWithCandidateInExpression(varName, dyExpr.getLeft()));
        }
        if (dyExpr.getRight() != null) {
            dyExpr.setRight(replaceVariableWithCandidateInExpression(varName, dyExpr.getRight()));
        }
    } else if (expr instanceof PrimaryExpression) {
        if (expr.getLeft() != null) {
            if (expr.getLeft() instanceof VariableExpression && ((VariableExpression) expr.getLeft()).getId().equals(varName)) {
                // Needs to be relative to candidate so just remove the "left"
                expr.setLeft(null);
            } else {
                expr.setLeft(replaceVariableWithCandidateInExpression(varName, expr.getLeft()));
            }
        }
    } else if (expr instanceof InvokeExpression) {
        InvokeExpression invokeExpr = (InvokeExpression) expr;
        if (invokeExpr.getLeft() != null) {
            invokeExpr.setLeft(replaceVariableWithCandidateInExpression(varName, invokeExpr.getLeft()));
        }
    // List<Expression> args = invokeExpr.getArguments(); // TODO Process Invoke args
    }
    // TODO More combinations
    return expr;
}

Example 28 with PrimaryExpression

use of org.datanucleus.query.expression.PrimaryExpression in project datanucleus-api-jdo by datanucleus.

the class JDOHelperGetObjectIdFunction method evaluate.

/* (non-Javadoc)
     * @see org.datanucleus.query.evaluator.memory.InvocationEvaluator#evaluate(org.datanucleus.query.expression.InvokeExpression, org.datanucleus.query.evaluator.memory.InMemoryExpressionEvaluator)
     */
public Object evaluate(InvokeExpression expr, Object invokedValue, InMemoryExpressionEvaluator eval) {
    Expression argExpr = expr.getArguments().get(0);
    if (argExpr instanceof PrimaryExpression) {
        PrimaryExpression primExpr = (PrimaryExpression) argExpr;
        Object value = eval.getValueForPrimaryExpression(primExpr);
        return JDOHelper.getObjectId(value);
    } else if (argExpr instanceof ParameterExpression) {
        ParameterExpression paramExpr = (ParameterExpression) argExpr;
        Object value = QueryUtils.getValueForParameterExpression(eval.getParameterValues(), paramExpr);
        return JDOHelper.getObjectId(value);
    } else {
        throw new NucleusException("Dont currently support JDOHelper.getObjectId with arg of type " + argExpr.getClass().getName());
    }
}

Example 29 with PrimaryExpression

use of org.datanucleus.query.expression.PrimaryExpression in project datanucleus-api-jdo by datanucleus.

the class JDOHelperGetVersionFunction method evaluate.

/* (non-Javadoc)
     * @see org.datanucleus.query.evaluator.memory.InvocationEvaluator#evaluate(org.datanucleus.query.expression.InvokeExpression, org.datanucleus.query.evaluator.memory.InMemoryExpressionEvaluator)
     */
public Object evaluate(InvokeExpression expr, Object invokedValue, InMemoryExpressionEvaluator eval) {
    Expression argExpr = expr.getArguments().get(0);
    if (argExpr instanceof PrimaryExpression) {
        PrimaryExpression primExpr = (PrimaryExpression) argExpr;
        Object value = eval.getValueForPrimaryExpression(primExpr);
        return JDOHelper.getVersion(value);
    } else if (argExpr instanceof ParameterExpression) {
        ParameterExpression paramExpr = (ParameterExpression) argExpr;
        Object value = QueryUtils.getValueForParameterExpression(eval.getParameterValues(), paramExpr);
        return JDOHelper.getVersion(value);
    } else {
        throw new NucleusException("Dont currently support JDOHelper.getVersion with arg of type " + argExpr.getClass().getName());
    }
}

Example 30 with PrimaryExpression

use of org.datanucleus.query.expression.PrimaryExpression in project tests by datanucleus.

the class JPQLCompilerTest method testFilterWithStringIndexOfLiteral.

/**
 * Tests for "String.indexOf(Literal, int)" in filter.
 */
public void testFilterWithStringIndexOfLiteral() {
    JavaQueryCompiler compiler = null;
    QueryCompilation compilation = null;
    try {
        compiler = new JPQLCompiler(nucCtx, nucCtx.getClassLoaderResolver(null), null, Project.class, null, "LENGTH(name) > 5", null, null, null, null, null, null, null);
        compilation = compiler.compile(new HashMap(), null);
    } catch (NucleusException ne) {
        NucleusLogger.QUERY.error("Exception during compile", ne);
        fail("compilation of filter with valid field threw exception : " + ne.getMessage());
    }
    Expression expr = compilation.getExprFilter();
    assertTrue("Compiled expression should have been DyadicExpression but wasnt", expr instanceof DyadicExpression);
    DyadicExpression dyExpr = (DyadicExpression) expr;
    assertTrue("DyadicExpression operator should have been > but wasnt", dyExpr.getOperator() == Expression.OP_GT);
    assertTrue("DyadicExpression left should have been InvokeExpression but wasnt", dyExpr.getLeft() instanceof InvokeExpression);
    InvokeExpression leftInvExpr = (InvokeExpression) dyExpr.getLeft();
    assertTrue("InvokeExpression invoked object should have been PrimaryExpression but wasnt", leftInvExpr.getLeft() instanceof PrimaryExpression);
    PrimaryExpression invPrimExpr = (PrimaryExpression) leftInvExpr.getLeft();
    assertEquals("PrimaryExpression field is wrong", "name", invPrimExpr.getId());
    assertEquals("InvokeExpression method is wrong", "length", leftInvExpr.getOperation());
    List args = leftInvExpr.getArguments();
    assertTrue("Number of args should be 0 but isnt", args == null || args.isEmpty());
    assertTrue("DyadicExpression left should have been Literal but wasnt", dyExpr.getRight() instanceof Literal);
    Literal rightExpr = (Literal) dyExpr.getRight();
    assertEquals("Parameter2 to indexOf() has wrong value", new Long(5), rightExpr.getLiteral());
}