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

Example 51 with ParameterExpression

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

the class Query method getSymbolForParameterInCompilation.

/**
 * Convenience method to find a symbol for the specified parameter in the provided compilation.
 * @param compilation The compilation
 * @param paramKey The parameter name/position
 * @return The symbol (if present)
 */
private Symbol getSymbolForParameterInCompilation(QueryCompilation compilation, Object paramKey) {
    Symbol sym = null;
    if (paramKey instanceof Integer) {
        ParameterExpression expr = compilation.getParameterExpressionForPosition((Integer) paramKey);
        if (expr != null) {
            sym = expr.getSymbol();
        }
    } else {
        String paramName = (String) paramKey;
        sym = compilation.getSymbolTable().getSymbol(paramName);
    }
    return sym;
}

Example 52 with ParameterExpression

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

the class JPQLCompilerTest method testFromMemberOfExpression.

/**
 * Tests for from clause with a "MEMBER OF {primary}" expression.
 */
public void testFromMemberOfExpression() {
    JavaQueryCompiler compiler = null;
    QueryCompilation compilation = null;
    try {
        compiler = new JPQLCompiler(nucCtx, nucCtx.getClassLoaderResolver(null), null, Department.class, null, ":param MEMBER OF projects", 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());
    }
    // InvokeExpression{[PrimaryExpression{elements}].contains(ParameterExpression{param})}
    Expression expr = compilation.getExprFilter();
    assertTrue("Invalid type of filter expression", expr instanceof InvokeExpression);
    InvokeExpression invokeExpr = (InvokeExpression) expr;
    assertEquals("Invoke method is incorrect", "contains", invokeExpr.getOperation());
    assertTrue("Invoke left expression is of incorrect type", invokeExpr.getLeft() instanceof PrimaryExpression);
    PrimaryExpression leftExpr = (PrimaryExpression) invokeExpr.getLeft();
    assertEquals("Invoke left expression id is wrong", "projects", leftExpr.getId());
    List args = invokeExpr.getArguments();
    assertNotNull("Number of args is null!", args);
    assertEquals("Incorrect number of args to invoke", 1, args.size());
    assertTrue("Argument is of incorrect type", args.get(0) instanceof ParameterExpression);
    ParameterExpression argExpr = (ParameterExpression) args.get(0);
    assertEquals("Argument param name is incorrect", "param", argExpr.getId());
}

Example 53 with ParameterExpression

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

the class JDOQLCompilerTest method testExpressionSerializable.

/**
 * Test for serialisability of Expressions.
 */
public void testExpressionSerializable() {
    // Test use of implicit variable in filter
    JavaQueryCompiler compiler = null;
    QueryCompilation compilation = null;
    try {
        compiler = new JDOQLCompiler(nucCtx, nucCtx.getClassLoaderResolver(null), null, Product.class, null, "name == param1", null, null, null, null, null, "java.lang.String param1", null, null);
        compilation = compiler.compile(null, null);
    } catch (NucleusUserException ne) {
        // TODO Debatable if this should throw a JDOUserException since the "notaField" is not bound, nor typed
        NucleusLogger.QUERY.error("Exception thrown during compilation", 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 be PrimaryExpression but isnt", dyExpr.getLeft() instanceof PrimaryExpression);
    assertTrue("Compiled right expression should be ParameterExpression but isnt", dyExpr.getRight() instanceof ParameterExpression);
    PrimaryExpression left = (PrimaryExpression) dyExpr.getLeft();
    assertEquals("Primary expression name is wrong", left.getId(), "name");
    ParameterExpression right = (ParameterExpression) dyExpr.getRight();
    assertEquals("ParameterExpression has wrong value", "param1", right.getId());
    try {
        try {
            // Serialise the Expression
            FileOutputStream fileStream = new FileOutputStream("expr.ser");
            ObjectOutputStream os = new ObjectOutputStream(fileStream);
            os.writeObject(expr);
            os.close();
        } catch (Exception e) {
            NucleusLogger.GENERAL.error(">> Exception in serialise", e);
            fail("Failed to serialise " + StringUtils.toJVMIDString(expr));
        }
        try {
            // Deserialise the Expression
            FileInputStream fileInputStream = new FileInputStream("expr.ser");
            ObjectInputStream oInputStream = new ObjectInputStream(fileInputStream);
            Object obj = oInputStream.readObject();
            if (obj instanceof Expression) {
                Expression expr1 = (Expression) obj;
                assertTrue("Compiled expression should have been DyadicExpression but wasnt", expr1 instanceof DyadicExpression);
                DyadicExpression dyExpr1 = (DyadicExpression) expr1;
                assertTrue("Compiled left expression should be PrimaryExpression but isnt", dyExpr1.getLeft() instanceof PrimaryExpression);
                assertTrue("Compiled right expression should be ParameterExpression but isnt", dyExpr1.getRight() instanceof ParameterExpression);
                PrimaryExpression left1 = (PrimaryExpression) dyExpr1.getLeft();
                assertEquals("Primary expression name is wrong", left1.getId(), "name");
                ParameterExpression right1 = (ParameterExpression) dyExpr1.getRight();
                assertEquals("ParameterExpression has wrong value", "param1", right1.getId());
            } else {
                fail("Deserialised object is " + obj.getClass().getName() + " not Expression");
            }
            oInputStream.close();
        } catch (Exception e) {
            NucleusLogger.GENERAL.error(">> Exception in deserialise", e);
            fail("Failed to deserialise " + StringUtils.toJVMIDString(expr));
        }
    } finally {
        // Delete the file
        File file = new File("expr.ser");
        if (file.exists()) {
            file.delete();
        }
    }
}

Example 54 with ParameterExpression

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

the class JDOQLCompilerTest method testFilterExplicitParameter.

/**
 * Test for use of an explicit parameter in the filter.
 */
public void testFilterExplicitParameter() {
    // Test use of implicit variable in filter
    JavaQueryCompiler compiler = null;
    QueryCompilation compilation = null;
    try {
        compiler = new JDOQLCompiler(nucCtx, nucCtx.getClassLoaderResolver(null), null, Product.class, null, "name == param1", null, null, null, null, null, "java.lang.String param1", null, null);
        compilation = compiler.compile(null, null);
    } catch (NucleusUserException ne) {
        // TODO Debatable if this should throw a JDOUserException since the "notaField" is not bound, nor typed
        NucleusLogger.QUERY.error("Exception thrown during compilation", 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 be PrimaryExpression but isnt", dyExpr.getLeft() instanceof PrimaryExpression);
    assertTrue("Compiled right expression should be ParameterExpression but isnt", dyExpr.getRight() instanceof ParameterExpression);
    PrimaryExpression left = (PrimaryExpression) dyExpr.getLeft();
    assertEquals("Primary expression name is wrong", left.getId(), "name");
    ParameterExpression right = (ParameterExpression) dyExpr.getRight();
    assertEquals("ParameterExpression has wrong value", "param1", right.getId());
}

Example 55 with ParameterExpression

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

the class JDOQLCompilerTest method testQueryCompilationSerializable.

/**
 * Test for serialisability of QueryCompilation.
 */
public void testQueryCompilationSerializable() {
    // Test use of implicit variable in filter
    JavaQueryCompiler compiler = null;
    QueryCompilation compilation = null;
    try {
        compiler = new JDOQLCompiler(nucCtx, nucCtx.getClassLoaderResolver(null), null, Product.class, null, "name == param1", null, null, null, null, null, "java.lang.String param1", null, null);
        compilation = compiler.compile(null, null);
    } catch (NucleusUserException ne) {
        // TODO Debatable if this should throw a JDOUserException since the "notaField" is not bound, nor typed
        NucleusLogger.QUERY.error("Exception thrown during compilation", ne);
        fail("compilation of filter with valid field threw exception : " + ne.getMessage());
    }
    try {
        try {
            // Serialise the Expression
            FileOutputStream fileStream = new FileOutputStream("compilation.ser");
            ObjectOutputStream os = new ObjectOutputStream(fileStream);
            os.writeObject(compilation);
            os.close();
        } catch (Exception e) {
            NucleusLogger.GENERAL.error(">> Exception in serialise", e);
            fail("Failed to serialise " + StringUtils.toJVMIDString(compilation));
        }
        try {
            // Deserialise the Expression
            FileInputStream fileInputStream = new FileInputStream("compilation.ser");
            ObjectInputStream oInputStream = new ObjectInputStream(fileInputStream);
            Object obj = oInputStream.readObject();
            if (obj instanceof QueryCompilation) {
                QueryCompilation compilation1 = (QueryCompilation) obj;
                Expression expr1 = compilation1.getExprFilter();
                assertTrue("Compiled expression should have been DyadicExpression but wasnt", expr1 instanceof DyadicExpression);
                DyadicExpression dyExpr1 = (DyadicExpression) expr1;
                assertTrue("Compiled left expression should be PrimaryExpression but isnt", dyExpr1.getLeft() instanceof PrimaryExpression);
                assertTrue("Compiled right expression should be ParameterExpression but isnt", dyExpr1.getRight() instanceof ParameterExpression);
                PrimaryExpression left1 = (PrimaryExpression) dyExpr1.getLeft();
                assertEquals("Primary expression name is wrong", left1.getId(), "name");
                ParameterExpression right1 = (ParameterExpression) dyExpr1.getRight();
                assertEquals("ParameterExpression has wrong value", "param1", right1.getId());
            } else {
                fail("Deserialised object is " + obj.getClass().getName() + " not QueryCompilation");
            }
            oInputStream.close();
        } catch (Exception e) {
            NucleusLogger.GENERAL.error(">> Exception in deserialise", e);
            fail("Failed to deserialise " + StringUtils.toJVMIDString(compilation));
        }
    } finally {
        // Delete the file
        File file = new File("compilation.ser");
        if (file.exists()) {
            file.delete();
        }
    }
}