/*****************************************************************
 *   Licensed to the Apache Software Foundation (ASF) under one
 *  or more contributor license agreements.  See the NOTICE file
 *  distributed with this work for additional information
 *  regarding copyright ownership.  The ASF licenses this file
 *  to you under the Apache License, Version 2.0 (the
 *  "License"); you may not use this file except in compliance
 *  with the License.  You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing,
 *  software distributed under the License is distributed on an
 *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 *  KIND, either express or implied.  See the License for the
 *  specific language governing permissions and limitations
 *  under the License.
 ****************************************************************/
package org.apache.cayenne.project.validation;

import org.apache.cayenne.configuration.DataChannelDescriptor;
import org.apache.cayenne.configuration.DataNodeDescriptor;
import org.apache.cayenne.configuration.server.XMLPoolingDataSourceFactory;
import org.apache.cayenne.util.Util;
import org.apache.cayenne.validation.ValidationResult;

class DataNodeValidator extends ConfigurationNodeValidator {

    void validate(DataNodeDescriptor node, ValidationResult validationResult) {
        validateName(node, validationResult);
        validateConnection(node, validationResult);
    }

    void validateConnection(DataNodeDescriptor node, ValidationResult validationResult) {

        String factory = node.getDataSourceFactoryType();

        // TODO: andrus 03/10/2010 - null factory is allowed, however
        // 'getDataSourceDescriptor' must ne not null in this case

        if (factory != null
                && !XMLPoolingDataSourceFactory.class.getName().equals(factory)) {
            String parameters = node.getParameters();
            if (Util.isEmptyString(parameters)) {
                addFailure(
                        validationResult,
                        node,
                        "DataNode has empty 'parameters' string");
            }
        }
    }

    void validateName(DataNodeDescriptor node, ValidationResult validationResult) {
        String name = node.getName();

        if (Util.isEmptyString(name)) {
            addFailure(validationResult, node, "Unnamed DataNode");
            return;
        }

        DataChannelDescriptor dataChannelDescriptor = node.getDataChannelDescriptor();

        // check for duplicate names in the parent context
        for (DataNodeDescriptor otherNode : dataChannelDescriptor.getNodeDescriptors()) {
            if (otherNode == node) {
                continue;
            }

            if (name.equals(otherNode.getName())) {
                addFailure(validationResult, node, "Duplicate DataNode name: %s", name);
                break;
            }
        }
    }
}