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

Example 71 with Literal

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

the class ArrayContainsMethod 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) {
    String method = expr.getOperation();
    if (invokedValue == null) {
        return Boolean.FALSE;
    }
    if (!invokedValue.getClass().isArray()) {
        throw new NucleusException(Localiser.msg("021011", method, invokedValue.getClass().getName()));
    }
    Object param = expr.getArguments().get(0);
    Object paramValue = null;
    if (param instanceof Literal) {
        paramValue = ((Literal) param).getLiteral();
    } else if (param instanceof PrimaryExpression) {
        PrimaryExpression primExpr = (PrimaryExpression) param;
        paramValue = eval.getValueForPrimaryExpression(primExpr);
    } else if (param instanceof ParameterExpression) {
        ParameterExpression paramExpr = (ParameterExpression) param;
        paramValue = QueryUtils.getValueForParameterExpression(eval.getParameterValues(), paramExpr);
    } else if (param instanceof VariableExpression) {
        VariableExpression varExpr = (VariableExpression) param;
        try {
            paramValue = eval.getValueForVariableExpression(varExpr);
        } catch (VariableNotSetException vnse) {
            // Throw an exception with the possible values
            throw new VariableNotSetException(varExpr, (Object[]) invokedValue);
        }
    } else {
        // TODO Implement this
        throw new NucleusException("Dont currently support use of Array.contains(" + param.getClass().getName() + ")");
    }
    for (int i = 0; i < Array.getLength(invokedValue); i++) {
        Object elem = Array.get(invokedValue, i);
        if (elem == null && paramValue == null) {
            return Boolean.TRUE;
        } else if (elem != null && paramValue != null) {
            if (elem.equals(paramValue)) {
                return Boolean.TRUE;
            }
            if (!paramValue.getClass().isAssignableFrom(elem.getClass()) && !elem.getClass().isAssignableFrom(paramValue.getClass())) {
                // Types are different, so add specific type conversion handling
                if ((paramValue.getClass() == Long.class || paramValue.getClass() == Integer.class || paramValue.getClass() == Short.class) && (elem.getClass() == Long.class || elem.getClass() == Integer.class || elem.getClass() == Short.class)) {
                    long paramLong = ((Number) paramValue).longValue();
                    long elemLong = ((Number) elem).longValue();
                    if (paramLong == elemLong) {
                        return Boolean.TRUE;
                    }
                }
            }
        }
    }
    return Boolean.FALSE;
}

Example 72 with Literal

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

the class ListGetMethod 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) {
    String method = expr.getOperation();
    if (invokedValue == null) {
        return null;
    }
    if (!(invokedValue instanceof List)) {
        throw new NucleusException(Localiser.msg("021011", method, invokedValue.getClass().getName()));
    }
    Object param = expr.getArguments().get(0);
    Object paramValue = null;
    if (param instanceof Literal) {
        paramValue = ((Literal) param).getLiteral();
    } else if (param instanceof PrimaryExpression) {
        PrimaryExpression primExpr = (PrimaryExpression) param;
        paramValue = eval.getValueForPrimaryExpression(primExpr);
    } else if (param instanceof ParameterExpression) {
        ParameterExpression paramExpr = (ParameterExpression) param;
        paramValue = QueryUtils.getValueForParameterExpression(eval.getParameterValues(), paramExpr);
    } else if (param instanceof VariableExpression) {
        VariableExpression varExpr = (VariableExpression) param;
        try {
            paramValue = eval.getValueForVariableExpression(varExpr);
        } catch (VariableNotSetException vnse) {
            // Throw an exception with the possible values of elements
            throw new VariableNotSetException(varExpr, ((List) invokedValue).toArray());
        }
    } else {
        throw new NucleusException("Dont currently support use of get(" + param.getClass().getName() + ")");
    }
    int paramInt;
    if (paramValue instanceof Number) {
        paramInt = ((Number) paramValue).intValue();
    } else {
        throw new NucleusException("List.get() should take in an integer but is " + paramValue);
    }
    return ((List) invokedValue).get(paramInt);
}

Example 73 with Literal

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

the class QueryUtils method getStringValueForExpression.

/**
 * Convenience method to get the String value for an Expression.
 * Currently only ParameterExpression and Literal are supported.
 * @param expr Expression
 * @param parameters Input parameters
 * @return The String value in the object for this expression
 */
public static String getStringValueForExpression(Expression expr, Map parameters) {
    String paramValue = null;
    if (expr instanceof ParameterExpression) {
        ParameterExpression paramExpr = (ParameterExpression) expr;
        Object obj = getValueForParameterExpression(parameters, paramExpr);
        paramValue = getStringValue(obj);
    } else if (expr instanceof Literal) {
        Literal literal = (Literal) expr;
        paramValue = getStringValue(literal.getLiteral());
    } else {
        throw new NucleusException("getStringValueForExpression(expr) where expr is instanceof " + expr.getClass().getName() + " not supported");
    }
    return paramValue;
}

Example 74 with Literal

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

the class JavaQueryCompiler method compileResult.

public Expression[] compileResult() {
    if (result == null) {
        return null;
    }
    Node[] node = parser.parseResult(result);
    Expression[] expr = new Expression[node.length];
    for (int i = 0; i < node.length; i++) {
        ExpressionCompiler comp = new ExpressionCompiler();
        comp.setSymbolTable(symtbl);
        comp.setMethodAliases(queryMgr.getQueryMethodAliasesByPrefix());
        // Find the last child of this node, and check for an alias (type = NAME)
        String alias = null;
        Node aliasNode = null;
        List<Node> childNodes = node[i].getChildNodes();
        if (childNodes != null && childNodes.size() > 0) {
            Node lastChild = childNodes.get(childNodes.size() - 1);
            if (lastChild.getNodeType() == NodeType.NAME) {
                // Alias node
                aliasNode = lastChild;
            }
        }
        if (aliasNode != null) {
            alias = (String) aliasNode.getNodeValue();
            node[i].removeChildNode(aliasNode);
        }
        if (candidateAliasOrig != null) {
            swapCandidateAliasNodeName(node[i]);
        }
        if (parameterSubtitutionMap != null) {
            node[i] = swapSubqueryParameters(node[i]);
        }
        expr[i] = comp.compileExpression(node[i]);
        if (alias != null) {
            expr[i].setAlias(alias);
        }
        try {
            expr[i].bind(symtbl);
        } catch (PrimaryExpressionIsClassLiteralException peil) {
            // PrimaryExpression should be swapped for a class Literal
            expr[i] = peil.getLiteral();
            expr[i].bind(symtbl);
        } catch (PrimaryExpressionIsClassStaticFieldException peil) {
            // PrimaryExpression should be swapped for a static field Literal
            Field fld = peil.getLiteralField();
            try {
                // Get the value of the static field
                Object value = fld.get(null);
                expr[i] = new Literal(value);
                expr[i].bind(symtbl);
            } catch (Exception e) {
                throw new NucleusUserException("Error processing static field " + fld.getName(), e);
            }
        } catch (PrimaryExpressionIsVariableException pive) {
            // PrimaryExpression should be swapped for an implicit variable
            expr[i] = pive.getVariableExpression();
            expr[i].bind(symtbl);
        }
        if (expr[i] instanceof PrimaryExpression) {
            String id = ((PrimaryExpression) expr[i]).getId();
            if (isKeyword(id)) {
                throw new NucleusUserException(Localiser.msg("021052", getLanguage(), id));
            }
        } else if (expr[i] instanceof ParameterExpression) {
            String id = ((ParameterExpression) expr[i]).getId();
            if (isKeyword(id)) {
                throw new NucleusUserException(Localiser.msg("021052", getLanguage(), id));
            }
        } else if (expr[i] instanceof VariableExpression) {
            String id = ((VariableExpression) expr[i]).getId();
            if (isKeyword(id)) {
                throw new NucleusUserException(Localiser.msg("021052", getLanguage(), id));
            }
        }
    }
    return expr;
}

Example 75 with Literal

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

the class JPQLCompilerTest method testFilterWithNegateExpression.

/**
 * Tests for "!(expression)".
 */
public void testFilterWithNegateExpression() {
    JavaQueryCompiler compiler = null;
    QueryCompilation compilation = null;
    try {
        compiler = new JPQLCompiler(nucCtx, nucCtx.getClassLoaderResolver(null), null, Project.class, null, "NOT (budget > 32)", 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("Compiled left expression should have been DyadicExpression but wasnt", dyExpr.getLeft() instanceof DyadicExpression);
    assertNull("Compiled right expression should have been null but wasnt", dyExpr.getRight());
    assertEquals("Expression operator is wrong", Expression.OP_NOT, dyExpr.getOperator());
    DyadicExpression leftExpr = (DyadicExpression) dyExpr.getLeft();
    assertTrue("Left (left) should be PrimaryExpression but isnt", leftExpr.getLeft() instanceof PrimaryExpression);
    assertTrue("Left (right) should be Literal but isnt", leftExpr.getRight() instanceof Literal);
    assertEquals("Left expression operator is wrong", Expression.OP_GT, leftExpr.getOperator());
    PrimaryExpression primExpr = (PrimaryExpression) leftExpr.getLeft();
    assertEquals("Left (left) expression has incorrect number of tuples", 1, primExpr.getTuples().size());
    assertEquals("Left (left) expression 'id' is incorrect", "budget", primExpr.getId());
    Literal lit = (Literal) leftExpr.getRight();
    assertTrue("Left (right) expression literal is of incorrect type", lit.getLiteral() instanceof Long);
    assertEquals("Left (right) expression literal has incorrect value", 32, ((Long) lit.getLiteral()).longValue());
}