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/*
 * Copyright (c) 2017, WSO2 Inc. (http://www.wso2.org) All Rights Reserved.
 *
 * WSO2 Inc. 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 io.siddhi.core.util;

import io.siddhi.core.exception.SiddhiAppRuntimeException;
import io.siddhi.query.api.definition.Attribute;


/**
 * Utility class to convert Object to the desired type using {@link Attribute.Type}
 */
public class AttributeConverter {

    /**
     * Convert the given object to the given type.
     *
     * @param propertyValue the actual object
     * @param attributeType the desired data type
     * @return the converted object
     */
    public static Object getPropertyValue(Object propertyValue, Attribute.Type attributeType) {
        switch (attributeType) {
            case BOOL:
                if (propertyValue instanceof Boolean) {
                    return propertyValue;
                } else if (propertyValue instanceof String) {
                    return Boolean.parseBoolean((String) propertyValue);
                } else {
                    throw new SiddhiAppRuntimeException("No supported mapping for '" + propertyValue +
                            "' with class '" + propertyValue.getClass().getName() + "' to attribute type '" +
                            attributeType + "'.");
                }
            case DOUBLE:
                if (propertyValue instanceof Double) {
                    return propertyValue;
                } else if (propertyValue instanceof Float) {
                    return Double.valueOf((Float) propertyValue);
                } else if (propertyValue instanceof String) {
                    return Double.parseDouble((String) propertyValue);
                } else {
                    throw new SiddhiAppRuntimeException("No supported mapping for '" + propertyValue +
                            "' with class '" + propertyValue.getClass().getName() + "' to attribute type '" +
                            attributeType + "'.");
                }
            case FLOAT:
                if (propertyValue instanceof Float) {
                    return propertyValue;
                } else if (propertyValue instanceof String) {
                    return Float.parseFloat((String) propertyValue);
                } else {
                    throw new SiddhiAppRuntimeException("No supported mapping for '" + propertyValue +
                            "' with class '" + propertyValue.getClass().getName() + "' to attribute type '" +
                            attributeType + "'.");
                }
            case INT:
                if (propertyValue instanceof Integer) {
                    return propertyValue;
                } else if (propertyValue instanceof String) {
                    return Integer.parseInt((String) propertyValue);
                } else {
                    throw new SiddhiAppRuntimeException("No supported mapping for '" + propertyValue +
                            "' with class '" + propertyValue.getClass().getName() + "' to attribute type '" +
                            attributeType + "'.");
                }
            case LONG:
                if (propertyValue instanceof Integer) {
                    return Long.valueOf((Integer) propertyValue);
                } else if (propertyValue instanceof Long) {
                    return propertyValue;
                } else if (propertyValue instanceof String) {
                    return Long.parseLong((String) propertyValue);
                } else {
                    throw new SiddhiAppRuntimeException("No supported mapping for '" + propertyValue +
                            "' with class '" + propertyValue.getClass().getName() + "' to attribute type '" +
                            attributeType + "'.");
                }
            case STRING:
                return propertyValue.toString();
            case OBJECT:
                return propertyValue;
            default:
                throw new SiddhiAppRuntimeException("Attribute type: " + attributeType + " not supported by XML " +
                        "mapping.");
        }
    }

    /**
     * Convert the given object to the given type.
     *
     * @param propertyValue the actual object
     * @param attributeType the desired data type
     * @return the converted object
     */
    public Object getPropertyValue(String propertyValue, Attribute.Type attributeType) {
        switch (attributeType) {
            case BOOL:
                return Boolean.parseBoolean(propertyValue);
            case DOUBLE:
                return Double.parseDouble(propertyValue);
            case FLOAT:
                return Float.parseFloat(propertyValue);
            case INT:
                return Integer.parseInt(propertyValue);
            case LONG:
                return Long.parseLong(propertyValue);
            case STRING:
                return propertyValue;
            case OBJECT:
                return propertyValue;
            default:
                throw new SiddhiAppRuntimeException("No supported mapping for '" + propertyValue +
                        "' with class '" + propertyValue.getClass().getName() + "' to attribute type '" +
                        attributeType + "'.");
        }
    }

}