/*
 * Copyright 2002-2019 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
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package org.springframework.transaction.annotation;

import java.lang.reflect.AnnotatedElement;

import org.springframework.lang.Nullable;
import org.springframework.transaction.interceptor.TransactionAttribute;

Strategy interface for parsing known transaction annotation types. AnnotationTransactionAttributeSource delegates to such parsers for supporting specific annotation types such as Spring's own Transactional, JTA 1.2's Transactional or EJB3's TransactionAttribute. 
Author:
Juergen Hoeller
See Also:
AnnotationTransactionAttributeSource
SpringTransactionAnnotationParser
Ejb3TransactionAnnotationParser
JtaTransactionAnnotationParser
Since:
2.5/**
 * Strategy interface for parsing known transaction annotation types.
 * {@link AnnotationTransactionAttributeSource} delegates to such
 * parsers for supporting specific annotation types such as Spring's own
 * {@link Transactional}, JTA 1.2's {@link javax.transaction.Transactional}
 * or EJB3's {@link javax.ejb.TransactionAttribute}.
 *
 * @author Juergen Hoeller
 * @since 2.5
 * @see AnnotationTransactionAttributeSource
 * @see SpringTransactionAnnotationParser
 * @see Ejb3TransactionAnnotationParser
 * @see JtaTransactionAnnotationParser
 */
public interface TransactionAnnotationParser {

	
Determine whether the given class is a candidate for transaction attributes in the annotation format of this TransactionAnnotationParser. 
If this method returns false, the methods on the given class will not get traversed for #parseTransactionAnnotation introspection. Returning false is therefore an optimization for non-affected classes, whereas true simply means that the class needs to get fully introspected for each method on the given class individually. 
Params:
targetClass – the class to introspect
Returns:
false if the class is known to have no transaction annotations at class or method level; true otherwise. The default implementation returns true, leading to regular introspection.
Since:
5.2/**
	 * Determine whether the given class is a candidate for transaction attributes
	 * in the annotation format of this {@code TransactionAnnotationParser}.
	 * <p>If this method returns {@code false}, the methods on the given class
	 * will not get traversed for {@code #parseTransactionAnnotation} introspection.
	 * Returning {@code false} is therefore an optimization for non-affected
	 * classes, whereas {@code true} simply means that the class needs to get
	 * fully introspected for each method on the given class individually.
	 * @param targetClass the class to introspect
	 * @return {@code false} if the class is known to have no transaction
	 * annotations at class or method level; {@code true} otherwise. The default
	 * implementation returns {@code true}, leading to regular introspection.
	 * @since 5.2
	 */
	default boolean isCandidateClass(Class<?> targetClass) {
		return true;
	}

	
Parse the transaction attribute for the given method or class,
based on an annotation type understood by this parser.
This essentially parses a known transaction annotation into Spring's metadata attribute class. Returns null if the method/class is not transactional. 
Params:
element – the annotated method or class
See Also:
AnnotationTransactionAttributeSource.determineTransactionAttribute
Returns:
the configured transaction attribute, or null if none found/**
	 * Parse the transaction attribute for the given method or class,
	 * based on an annotation type understood by this parser.
	 * <p>This essentially parses a known transaction annotation into Spring's metadata
	 * attribute class. Returns {@code null} if the method/class is not transactional.
	 * @param element the annotated method or class
	 * @return the configured transaction attribute, or {@code null} if none found
	 * @see AnnotationTransactionAttributeSource#determineTransactionAttribute
	 */
	@Nullable
	TransactionAttribute parseTransactionAnnotation(AnnotatedElement element);

}