validatorbeandefinitionparser.java

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/*
 * Copyright 2002-2004 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 de.mindmatters.faces.spring.factory.aspectj;

import javax.faces.validator.Validator;

import org.springframework.beans.factory.config.BeanDefinition;
import org.springframework.beans.factory.config.BeanDefinitionHolder;
import org.springframework.beans.factory.parsing.BeanComponentDefinition;
import org.springframework.beans.factory.support.AbstractBeanDefinition;
import org.springframework.beans.factory.support.BeanDefinitionBuilder;
import org.springframework.beans.factory.support.BeanDefinitionReaderUtils;
import org.springframework.beans.factory.xml.BeanDefinitionParser;
import org.springframework.beans.factory.xml.ParserContext;
import org.w3c.dom.Element;

/**
 * {@link org.springframework.beans.factory.xml.BeanDefinitionParser}
 * implementation for parsing JSF validator tags and creating the appropriate
 * {@link ValidatorDefinition} definitions.
 * 
 * @author Andreas Kuhrwahl
 * 
 */
final class ValidatorBeanDefinitionParser implements BeanDefinitionParser {

    /**
     * {@inheritDoc}
     */
    public BeanDefinition parse(final Element element,
            final ParserContext parserContext) {
        Class validatorClass = JsfBeanDefinitionParserUtils
                .createComponentClass(
                        element
                                .getAttribute(JsfBeanDefinitionParserUtils.CLASS_ATTRIBUTE),
                        Validator.class, parserContext);
        if (validatorClass != null) {
            String validatorClassName = validatorClass.getName();
            AbstractBeanDefinition validator = parserContext.getDelegate()
                    .parseBeanDefinitionElement(element, null, null);
            validator.setBeanClass(validatorClass);
            validator.setSingleton(false);
            validator.setRole(BeanDefinition.ROLE_SUPPORT);
            BeanDefinitionHolder holder = new BeanDefinitionHolder(validator,
                    validatorClassName);
            parserContext.getDelegate().decorateBeanDefinitionIfRequired(
                    element, holder);
            BeanDefinitionReaderUtils.registerBeanDefinition(holder,
                    parserContext.getRegistry());
            registerValidatorDefinition(element
                    .getAttribute(JsfBeanDefinitionParserUtils.ID_ATTRIBUTE),
                    validatorClassName, parserContext);
            parserContext.getReaderContext().fireComponentRegistered(
                    new BeanComponentDefinition(holder));
        }
        return null;
    }

    /**
     * Creates and registers a {@link ValidatorDefinition}.
     * 
     * @param validatorId
     *            the id - for registration
     * @param validatorClassName
     *            the validator class name
     * @param parserContext
     *            the {@link ParserContext}
     */
    private void registerValidatorDefinition(final String validatorId,
            final String validatorClassName, final ParserContext parserContext) {
        BeanDefinitionBuilder builder = BeanDefinitionBuilder
                .rootBeanDefinition(ValidatorDefinition.class);
        builder.addConstructorArg(validatorId);
        builder.addConstructorArg(validatorClassName);
        builder.setRole(BeanDefinition.ROLE_INFRASTRUCTURE);
        BeanDefinitionReaderUtils.registerWithGeneratedName(builder
                .getBeanDefinition(), parserContext.getRegistry());
    }

}