/*
 * Copyright 2002-2011 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.flex.config.xml;

import java.util.ArrayList;
import java.util.List;

import org.springframework.security.access.ConfigAttribute;
import org.springframework.security.access.SecurityConfig;
import org.springframework.util.StringUtils;

/**
 * Implementation of {@link SpringSecurityConfigHelper} that is specific to Spring Security 3 and above.
 *
 * @author Jeremy Grelle
 */
public class SpringSecurity3ConfigHelper implements SpringSecurityConfigHelper {

    private static final String LOGIN_COMMAND_CLASS_NAME = "org.springframework.flex.security3.SpringSecurityLoginCommand";
    
    private static final String SECURITY_CONFIG_POST_PROCESSOR_CLASS_NAME = "org.springframework.flex.security3.SecurityConfigurationPostProcessor";

    private static final String ENDPOINT_INTERCEPTOR_CLASS_NAME = "org.springframework.flex.security3.EndpointInterceptor";

    private static final String ENDPOINT_DEFINITION_SOURCE_CLASS_NAME = "org.springframework.flex.security3.EndpointSecurityMetadataSource";

    private static final String LOGIN_MESSAGE_INTERCEPTOR_CLASS_NAME = "org.springframework.flex.security3.LoginMessageInterceptor";
    
    private static final String PER_CLIENT_AUTHENTICATION_INTERCEPTOR_CLASS_NAME = "org.springframework.flex.security3.PerClientAuthenticationInterceptor";
    
    private static final String SECURITY_EXCEPTION_TRANSLATOR_CLASS_NAME = "org.springframework.flex.security3.SecurityExceptionTranslator";
    
    public String getAccessManagerId() {
        // In Spring Security 3, the AccessDecisionManager no longer gets assigned a well-known default ID
        return null;
    }

    public String getAuthenticationManagerId() {
        return "org.springframework.security.authenticationManager";
    }

    public String getLoginMessageInterceptorClassName() {
        return LOGIN_MESSAGE_INTERCEPTOR_CLASS_NAME;
    }

    public String getPerClientAuthenticationInterceptorClassName() {
        return PER_CLIENT_AUTHENTICATION_INTERCEPTOR_CLASS_NAME;
    }

    public String getSecurityExceptionTranslatorClassName() {
        return SECURITY_EXCEPTION_TRANSLATOR_CLASS_NAME;
    }

    public Object parseConfigAttributes(String access) {
        if (StringUtils.hasText(access)) {
            String[] attrs = StringUtils.commaDelimitedListToStringArray(access);
            List<ConfigAttribute> config = new ArrayList<ConfigAttribute>();
            for (int i = 0; i < attrs.length; i++) {
                config.add(new SecurityConfig(attrs[i]));
            }
            return config;
        } else {
            return null;
        }
    }

    public String getEndpointDefinitionSourceClassName() {
        return ENDPOINT_DEFINITION_SOURCE_CLASS_NAME;
    }

    public String getEndpointInterceptorClassName() {
        return ENDPOINT_INTERCEPTOR_CLASS_NAME;
    }

    public String getLoginCommandClassName() {
        return LOGIN_COMMAND_CLASS_NAME;
    }

	public String getSecurityConfigPostProcessorClassName() {
		return SECURITY_CONFIG_POST_PROCESSOR_CLASS_NAME;
	}
}