/*
 * Copyright 2002-2012 the original author or authors.
 *
 * 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
 *
 *      https://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.springframework.jmx.export.metadata;

import java.lang.reflect.Method;

import org.springframework.lang.Nullable;

Interface used by the MetadataMBeanInfoAssembler to read source-level metadata from a managed resource's class. 
Author:
Rob Harrop, Jennifer Hickey
See Also:
MetadataMBeanInfoAssembler.setAttributeSource
MBeanExporter.setAssembler
Since:
1.2/**
 * Interface used by the {@code MetadataMBeanInfoAssembler} to
 * read source-level metadata from a managed resource's class.
 *
 * @author Rob Harrop
 * @author Jennifer Hickey
 * @since 1.2
 * @see org.springframework.jmx.export.assembler.MetadataMBeanInfoAssembler#setAttributeSource
 * @see org.springframework.jmx.export.MBeanExporter#setAssembler
 */
public interface JmxAttributeSource {

	
Implementations should return an instance of ManagedResource if the supplied Class has the appropriate metadata. Otherwise should return null. 
Params:
clazz – the class to read the attribute data from
Throws:
InvalidMetadataException – in case of invalid attributes
Returns:
the attribute, or null if not found/**
	 * Implementations should return an instance of {@code ManagedResource}
	 * if the supplied {@code Class} has the appropriate metadata.
	 * Otherwise should return {@code null}.
	 * @param clazz the class to read the attribute data from
	 * @return the attribute, or {@code null} if not found
	 * @throws InvalidMetadataException in case of invalid attributes
	 */
	@Nullable
	ManagedResource getManagedResource(Class<?> clazz) throws InvalidMetadataException;

	
Implementations should return an instance of ManagedAttribute if the supplied Method has the corresponding metadata. Otherwise should return null. 
Params:
method – the method to read the attribute data from
Throws:
InvalidMetadataException – in case of invalid attributes
Returns:
the attribute, or null if not found/**
	 * Implementations should return an instance of {@code ManagedAttribute}
	 * if the supplied {@code Method} has the corresponding metadata.
	 * Otherwise should return {@code null}.
	 * @param method the method to read the attribute data from
	 * @return the attribute, or {@code null} if not found
	 * @throws InvalidMetadataException in case of invalid attributes
	 */
	@Nullable
	ManagedAttribute getManagedAttribute(Method method) throws InvalidMetadataException;

	
Implementations should return an instance of ManagedMetric if the supplied Method has the corresponding metadata. Otherwise should return null. 
Params:
method – the method to read the attribute data from
Throws:
InvalidMetadataException – in case of invalid attributes
Returns:
the metric, or null if not found/**
	 * Implementations should return an instance of {@code ManagedMetric}
	 * if the supplied {@code Method} has the corresponding metadata.
	 * Otherwise should return {@code null}.
	 * @param method the method to read the attribute data from
	 * @return the metric, or {@code null} if not found
	 * @throws InvalidMetadataException in case of invalid attributes
	 */
	@Nullable
	ManagedMetric getManagedMetric(Method method) throws InvalidMetadataException;

	
Implementations should return an instance of ManagedOperation if the supplied Method has the corresponding metadata. Otherwise should return null. 
Params:
method – the method to read the attribute data from
Throws:
InvalidMetadataException – in case of invalid attributes
Returns:
the attribute, or null if not found/**
	 * Implementations should return an instance of {@code ManagedOperation}
	 * if the supplied {@code Method} has the corresponding metadata.
	 * Otherwise should return {@code null}.
	 * @param method the method to read the attribute data from
	 * @return the attribute, or {@code null} if not found
	 * @throws InvalidMetadataException in case of invalid attributes
	 */
	@Nullable
	ManagedOperation getManagedOperation(Method method) throws InvalidMetadataException;

	
Implementations should return an array of ManagedOperationParameter if the supplied Method has the corresponding metadata. Otherwise should return an empty array if no metadata is found. 
Params:
method – the Method to read the metadata from
Throws:
InvalidMetadataException – in the case of invalid attributes.
Returns:
the parameter information./**
	 * Implementations should return an array of {@code ManagedOperationParameter}
	 * if the supplied {@code Method} has the corresponding metadata. Otherwise
	 * should return an empty array if no metadata is found.
	 * @param method the {@code Method} to read the metadata from
	 * @return the parameter information.
	 * @throws InvalidMetadataException in the case of invalid attributes.
	 */
	ManagedOperationParameter[] getManagedOperationParameters(Method method) throws InvalidMetadataException;

	
Implementations should return an array of ManagedNotifications if the supplied the Class has the corresponding metadata. Otherwise should return an empty array. 
Params:
clazz – the Class to read the metadata from
Throws:
InvalidMetadataException – in the case of invalid metadata
Returns:
the notification information/**
	 * Implementations should return an array of {@link ManagedNotification ManagedNotifications}
	 * if the supplied the {@code Class} has the corresponding metadata. Otherwise
	 * should return an empty array.
	 * @param clazz the {@code Class} to read the metadata from
	 * @return the notification information
	 * @throws InvalidMetadataException in the case of invalid metadata
	 */
	ManagedNotification[] getManagedNotifications(Class<?> clazz) throws InvalidMetadataException;



}