/*
 * Copyright 2002-2017 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
 *
 *      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.springframework.jmx.export.assembler;

import java.lang.reflect.Method;
import java.util.Arrays;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Properties;
import java.util.Set;

import org.springframework.lang.Nullable;
import org.springframework.util.StringUtils;

AbstractReflectiveMBeanInfoAssembler subclass that allows method names to be explicitly excluded as MBean operations and attributes. 
Any method not explicitly excluded from the management interface will be exposed to
JMX. JavaBean getters and setters will automatically be exposed as JMX attributes.
You can supply an array of method names via the ignoredMethods property. If you have multiple beans and you wish each bean to use a different set of method names, then you can map bean keys (that is the name used to pass the bean to the MBeanExporter) to a list of method names using the ignoredMethodMappings property. 
If you specify values for both ignoredMethodMappings and ignoredMethods, Spring will attempt to find method names in the mappings first. If no method names for the bean are found, it will use the method names defined by ignoredMethods. 
Author:
Rob Harrop, Seth Ladd
See Also:
setIgnoredMethods
setIgnoredMethodMappings
InterfaceBasedMBeanInfoAssembler
SimpleReflectiveMBeanInfoAssembler
MethodNameBasedMBeanInfoAssembler
MBeanExporter
Since:
1.2.5/**
 * {@code AbstractReflectiveMBeanInfoAssembler} subclass that allows
 * method names to be explicitly excluded as MBean operations and attributes.
 *
 * <p>Any method not explicitly excluded from the management interface will be exposed to
 * JMX. JavaBean getters and setters will automatically be exposed as JMX attributes.
 *
 * <p>You can supply an array of method names via the {@code ignoredMethods}
 * property. If you have multiple beans and you wish each bean to use a different
 * set of method names, then you can map bean keys (that is the name used to pass
 * the bean to the {@code MBeanExporter}) to a list of method names using the
 * {@code ignoredMethodMappings} property.
 *
 * <p>If you specify values for both {@code ignoredMethodMappings} and
 * {@code ignoredMethods}, Spring will attempt to find method names in the
 * mappings first. If no method names for the bean are found, it will use the
 * method names defined by {@code ignoredMethods}.
 *
 * @author Rob Harrop
 * @author Seth Ladd
 * @since 1.2.5
 * @see #setIgnoredMethods
 * @see #setIgnoredMethodMappings
 * @see InterfaceBasedMBeanInfoAssembler
 * @see SimpleReflectiveMBeanInfoAssembler
 * @see MethodNameBasedMBeanInfoAssembler
 * @see org.springframework.jmx.export.MBeanExporter
 */
public class MethodExclusionMBeanInfoAssembler extends AbstractConfigurableMBeanInfoAssembler {

	@Nullable
	private Set<String> ignoredMethods;

	@Nullable
	private Map<String, Set<String>> ignoredMethodMappings;


	
Set the array of method names to be ignored when creating the management info.
These method names will be used for a bean if no entry corresponding to that bean is found in the ignoredMethodsMappings property. 
See Also:
setIgnoredMethodMappings(Properties)/**
	 * Set the array of method names to be <b>ignored</b> when creating the management info.
	 * <p>These method names will be used for a bean if no entry corresponding to
	 * that bean is found in the {@code ignoredMethodsMappings} property.
	 * @see #setIgnoredMethodMappings(java.util.Properties)
	 */
	public void setIgnoredMethods(String... ignoredMethodNames) {
		this.ignoredMethods = new HashSet<>(Arrays.asList(ignoredMethodNames));
	}

	
Set the mappings of bean keys to a comma-separated list of method names.
These method names are ignored when creating the management interface.
The property key must match the bean key and the property value must match
the list of method names. When searching for method names to ignore for a bean,
Spring will check these mappings first.
/**
	 * Set the mappings of bean keys to a comma-separated list of method names.
	 * <p>These method names are <b>ignored</b> when creating the management interface.
	 * <p>The property key must match the bean key and the property value must match
	 * the list of method names. When searching for method names to ignore for a bean,
	 * Spring will check these mappings first.
	 */
	public void setIgnoredMethodMappings(Properties mappings) {
		this.ignoredMethodMappings = new HashMap<>();
		for (Enumeration<?> en = mappings.keys(); en.hasMoreElements();) {
			String beanKey = (String) en.nextElement();
			String[] methodNames = StringUtils.commaDelimitedListToStringArray(mappings.getProperty(beanKey));
			this.ignoredMethodMappings.put(beanKey, new HashSet<>(Arrays.asList(methodNames)));
		}
	}


	@Override
	protected boolean includeReadAttribute(Method method, String beanKey) {
		return isNotIgnored(method, beanKey);
	}

	@Override
	protected boolean includeWriteAttribute(Method method, String beanKey) {
		return isNotIgnored(method, beanKey);
	}

	@Override
	protected boolean includeOperation(Method method, String beanKey) {
		return isNotIgnored(method, beanKey);
	}

	
Determine whether the given method is supposed to be included,
that is, not configured as to be ignored.
Params:
method – the operation method
beanKey – the key associated with the MBean in the beans map of the MBeanExporter/**
	 * Determine whether the given method is supposed to be included,
	 * that is, not configured as to be ignored.
	 * @param method the operation method
	 * @param beanKey the key associated with the MBean in the beans map
	 * of the {@code MBeanExporter}
	 */
	protected boolean isNotIgnored(Method method, String beanKey) {
		if (this.ignoredMethodMappings != null) {
			Set<String> methodNames = this.ignoredMethodMappings.get(beanKey);
			if (methodNames != null) {
				return !methodNames.contains(method.getName());
			}
		}
		if (this.ignoredMethods != null) {
			return !this.ignoredMethods.contains(method.getName());
		}
		return true;
	}

}