Examples with Expression javax.jdo.query.Expression used on opensource projects

Example 1 with Expression

use of javax.jdo.query.Expression in project datanucleus-api-jdo by datanucleus.

the class JDOQLTypedQueryImpl method variable.

/* (non-Javadoc)
     * @see javax.jdo.JDOQLTypedQuery#variable(java.lang.String, java.lang.Class)
     */
public <V> Expression<V> variable(String name, Class<V> type) {
    assertIsOpen();
    discardCompiled();
    Expression varExpr = null;
    if (ec.getApiAdapter().isPersistable(type)) {
        // Persistable class
        String typeName = type.getName();
        int pos = typeName.lastIndexOf('.');
        String qName = typeName.substring(0, pos + 1) + getQueryClassNameForClassName(typeName.substring(pos + 1));
        try {
            Class qClass = ec.getClassLoaderResolver().classForName(qName);
            Constructor ctr = qClass.getConstructor(new Class[] { Class.class, String.class, ExpressionType.class });
            Object candObj = ctr.newInstance(new Object[] { type, name, ExpressionType.VARIABLE });
            varExpr = (Expression) candObj;
        } catch (NoSuchMethodException nsme) {
            throw new JDOException("Class " + typeName + " has a Query class but has no constructor for variables");
        } catch (IllegalAccessException iae) {
            throw new JDOException("Class " + typeName + " has a Query class but has no constructor for variables");
        } catch (InvocationTargetException ite) {
            throw new JDOException("Class " + typeName + " has a Query class but has no constructor for variables");
        } catch (InstantiationException ie) {
            throw new JDOException("Class " + typeName + " has a Query class but has no constructor for variables");
        }
    } else if (type == Boolean.class || type == boolean.class) {
        varExpr = new BooleanExpressionImpl(type, name, ExpressionType.VARIABLE);
    } else if (type == Byte.class || type == byte.class) {
        varExpr = new ByteExpressionImpl(type, name, ExpressionType.VARIABLE);
    } else if (type == Character.class || type == char.class) {
        varExpr = new CharacterExpressionImpl(type, name, ExpressionType.VARIABLE);
    } else if (type == Double.class || type == double.class) {
        varExpr = new NumericExpressionImpl(type, name, ExpressionType.VARIABLE);
    } else if (type == Float.class || type == float.class) {
        varExpr = new NumericExpressionImpl(type, name, ExpressionType.VARIABLE);
    } else if (type == Integer.class || type == int.class) {
        varExpr = new NumericExpressionImpl(type, name, ExpressionType.VARIABLE);
    } else if (type == Long.class || type == long.class) {
        varExpr = new NumericExpressionImpl(type, name, ExpressionType.VARIABLE);
    } else if (type == Short.class || type == short.class) {
        varExpr = new NumericExpressionImpl(type, name, ExpressionType.VARIABLE);
    } else if (type == String.class) {
        varExpr = new StringExpressionImpl((Class<String>) type, name, ExpressionType.VARIABLE);
    } else if (Time.class.isAssignableFrom(type)) {
        varExpr = new TimeExpressionImpl((Class<Time>) type, name, ExpressionType.VARIABLE);
    } else if (Date.class.isAssignableFrom(type)) {
        varExpr = new DateExpressionImpl((Class<Date>) type, name, ExpressionType.VARIABLE);
    } else if (java.util.Date.class.isAssignableFrom(type)) {
        varExpr = new DateTimeExpressionImpl((Class<java.util.Date>) type, name, ExpressionType.VARIABLE);
    } else {
        varExpr = new ObjectExpressionImpl(type, name, ExpressionType.VARIABLE);
    }
    return varExpr;
}

Example 2 with Expression

use of javax.jdo.query.Expression in project datanucleus-api-jdo by datanucleus.

the class JDOQLTypedQueryImpl method setParameters.

/* (non-Javadoc)
     * @see javax.jdo.JDOQLTypedQuery#setParameters(java.util.Map)
     */
@Override
public JDOQLTypedQuery<T> setParameters(Map namedParamMap) {
    assertIsOpen();
    discardCompiled();
    if (namedParamMap == null || namedParamMap.isEmpty()) {
        parameterValuesByName = null;
        return this;
    }
    if (parameterValuesByName == null) {
        parameterValuesByName = new ConcurrentHashMap<>();
    }
    Iterator<Map.Entry> entryIter = namedParamMap.entrySet().iterator();
    while (entryIter.hasNext()) {
        Map.Entry entry = entryIter.next();
        Object key = entry.getKey();
        Object val = entry.getValue();
        if (key instanceof String) {
            if (parameterExprByName == null || (parameterExprByName != null && !parameterExprByName.containsKey(key))) {
                throw new JDOUserException("Parameter with name " + key + " doesnt exist for this query");
            }
            parameterValuesByName.put((String) key, val);
        } else if (key instanceof Expression) {
            ParameterExpression internalParamExpr = (ParameterExpression) ((ExpressionImpl) key).getQueryExpression();
            if (parameterExprByName == null || (parameterExprByName != null && !parameterExprByName.containsKey(internalParamExpr.getAlias()))) {
                throw new JDOUserException("Parameter with name " + internalParamExpr.getAlias() + " doesnt exist for this query");
            }
            parameterValuesByName.put(internalParamExpr.getAlias(), val);
        }
    }
    return this;
}

Example 3 with Expression

use of javax.jdo.query.Expression in project datanucleus-api-jdo by datanucleus.

the class JDOQLTypedSubqueryImpl method internalSelect.

protected Expression internalSelect(Expression expr, Class implClass) {
    discardCompiled();
    this.result = new ArrayList<ExpressionImpl>();
    this.result.add((ExpressionImpl) expr);
    VariableExpression varExpr = new VariableExpression(getAlias());
    try {
        Constructor ctr = implClass.getConstructor(new Class[] { org.datanucleus.query.expression.Expression.class });
        return (Expression) ctr.newInstance(new Object[] { varExpr });
    } catch (NoSuchMethodException nsme) {
        throw new JDOException("Unable to create expression of type " + expr.getClass().getName() + " since required constructor doesnt exist");
    } catch (InvocationTargetException ite) {
        throw new JDOException("Unable to create expression of type " + expr.getClass().getName() + " due to error in constructor");
    } catch (IllegalAccessException iae) {
        throw new JDOException("Unable to create expression of type " + expr.getClass().getName() + " due to error in constructor");
    } catch (InstantiationException ie) {
        throw new JDOException("Unable to create expression of type " + expr.getClass().getName() + " due to error in constructor");
    }
}