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Lifecycle AOP Framework. Enabling describe enhanced State Diagram with Java language, and processing relational Lifecycle constraints(including: state validations, transitions validations), concurrency, lifecycle callbacks, lifecycle events implicitely with Lifecycle Engine. This engine can be used by class load time (Java Instrumentation) or compile time (Lifecycle-StaticWeaver-maven-plugin).

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/*
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 * Copyright (c) 2013-2020 Madz. All rights reserved.
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 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License"). You
 * may not use this file except in compliance with the License. You can
 * obtain a copy of the License at
 * https://raw.github.com/zhongdj/Lifecycle/master/License.txt
 * . See the License for the specific
 * language governing permissions and limitations under the License.
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package net.imadz.lifecycle.meta.builder.impl.helpers;

import java.lang.reflect.Method;
import java.util.HashSet;

import net.imadz.lifecycle.SyntaxErrors;
import net.imadz.lifecycle.annotations.action.Condition;
import net.imadz.lifecycle.meta.builder.impl.StateMachineObjectBuilderImpl;
import net.imadz.lifecycle.meta.type.StateMachineMetadata;
import net.imadz.util.MethodScanCallback;
import net.imadz.verification.VerificationFailureSet;

public final class ConditionProviderMethodScanner implements MethodScanCallback {

    private final StateMachineObjectBuilderImpl stateMachineObjectBuilderImpl;
    private final VerificationFailureSet failureSet;
    private HashSet> conditions = new HashSet>();
    private StateMachineMetadata template;
    private Class klass;

    public ConditionProviderMethodScanner(StateMachineObjectBuilderImpl stateMachineObjectBuilderImpl, Class klass, StateMachineMetadata template,
            VerificationFailureSet failureSet) {
        this.stateMachineObjectBuilderImpl = stateMachineObjectBuilderImpl;
        this.template = template;
        this.klass = klass;
        this.failureSet = failureSet;
    }

    @Override
    public boolean onMethodFound(Method method) {
        if (method.isBridge()) return false;
        final Condition condition = method.getAnnotation(Condition.class);
        if ( null != condition ) {
            if ( template.hasCondition(condition.value()) ) {
                if ( conditions.contains(condition.value()) ) {
                    failureSet.add(this.stateMachineObjectBuilderImpl.newVerificationException(klass.getName(),
                            SyntaxErrors.LM_CONDITION_MULTIPLE_METHODS_REFERENCE_SAME_CONDITION, klass, condition.value()));
                } else {
                    if ( !condition.value().isAssignableFrom(method.getReturnType()) ) {
                        failureSet.add(this.stateMachineObjectBuilderImpl.newVerificationException(klass.getName(),
                                SyntaxErrors.LM_CONDITION_OBJECT_DOES_NOT_IMPLEMENT_CONDITION_INTERFACE, method, condition.value()));
                    }
                    conditions.add(condition.value());
                }
            } else {
                failureSet.add(this.stateMachineObjectBuilderImpl.newVerificationException(klass.getName(), SyntaxErrors.LM_CONDITION_REFERENCE_INVALID,
                        method, condition.value()));
            }
        }
        return false;
    }
}