org.apache.river.springframework.config.ApplicationContextAdapter.java Source code

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Here is the source code for org.apache.river.springframework.config.ApplicationContextAdapter.java

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/*
 * Licensed 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.river.springframework.config;

import java.util.Objects;
import net.jini.config.Configuration;
import net.jini.config.ConfigurationException;
import net.jini.config.NoSuchEntryException;
import org.springframework.beans.BeansException;
import org.springframework.beans.factory.NoSuchBeanDefinitionException;
import org.springframework.context.ApplicationContext;

public class ApplicationContextAdapter implements Configuration {

    private final ApplicationContext adaptee;

    public ApplicationContextAdapter(ApplicationContext adaptee) {
        this.adaptee = adaptee;
    }

    public ApplicationContext getAdaptee() {
        return adaptee;
    }

    @Override
    public Object getEntry(String component, String name, Class type) throws ConfigurationException {
        return getEntry(component, name, type, Configuration.NO_DEFAULT);
    }

    @Override
    public Object getEntry(String component, String name, Class type, Object defaultValue)
            throws ConfigurationException {
        return getEntry(component, name, type, defaultValue, Configuration.NO_DATA);
    }

    @Override
    public Object getEntry(String component, String name, Class type, Object defaultValue, Object data)
            throws ConfigurationException {
        Objects.requireNonNull(name, "The name parameter must not be null.");
        Objects.requireNonNull(name, "The type parameter must not be null.");

        Object value = null;

        try {
            if (component != null && !component.isEmpty()) {
                try {
                    value = adaptee.getBean(component + "." + name);
                } catch (NoSuchBeanDefinitionException e) {
                }
            }
            if (value == null) {
                try {
                    value = adaptee.getBean(name);
                } catch (NoSuchBeanDefinitionException e) {
                }
            }
        } catch (BeansException e) {
            throw new ConfigurationException("Unable to get configuration value.", e);
        }

        if (value == null) {
            if (defaultValue == Configuration.NO_DEFAULT) {
                throw new NoSuchEntryException("No configuration value found.");
            } else {
                value = defaultValue;
            }
        }

        if (value != null) {
            if ((type.isPrimitive() && (type == boolean.class && value instanceof Boolean)
                    || (type == char.class && value instanceof Character)
                    || (type == byte.class && value instanceof Byte)
                    || (type == short.class && value instanceof Short)
                    || (type == int.class && value instanceof Integer)
                    || (type == long.class && value instanceof Long)
                    || (type == float.class && value instanceof Float)
                    || (type == double.class && value instanceof Double)) || type.isInstance(value)) {

            } else {
                throw new IllegalArgumentException("Configuration value cannot be converted to type.");
            }
        }

        return value;
    }
}