org.zalando.spring.data.businesskey.config.BusinessKeyHandlerBeanDefinitionParser.java Source code

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Here is the source code for org.zalando.spring.data.businesskey.config.BusinessKeyHandlerBeanDefinitionParser.java

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/**
 * Copyright (C) 2015 Zalando SE (http://tech.zalando.com)
 *
 * 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.zalando.spring.data.businesskey.config;

import org.springframework.aop.framework.ProxyFactoryBean;
import org.springframework.aop.target.LazyInitTargetSource;
import org.springframework.beans.factory.config.BeanDefinition;
import org.springframework.beans.factory.support.BeanDefinitionBuilder;
import org.springframework.beans.factory.xml.AbstractSingleBeanDefinitionParser;
import org.springframework.beans.factory.xml.BeanDefinitionParser;
import org.springframework.util.StringUtils;
import org.w3c.dom.Element;

/**
 * {@link BeanDefinitionParser} that parses and {@link BusinessKeyHandler} {@link BeanDefinition}.
 *
 * @author  Joerg Bellmann
 */
public class BusinessKeyHandlerBeanDefinitionParser extends AbstractSingleBeanDefinitionParser {

    private static final String BUSINESSKEY_GENERATOR_REF = "businesskey-generator-ref";

    @Override
    protected Class<?> getBeanClass(final Element element) {
        return BusinessKeyHandler.class;
    }

    @Override
    protected boolean shouldGenerateId() {
        return true;
    }

    @Override
    protected void doParse(final Element element, final BeanDefinitionBuilder builder) {

        String keyGeneratorRef = element.getAttribute(BUSINESSKEY_GENERATOR_REF);
        if (StringUtils.hasText(keyGeneratorRef)) {
            builder.addPropertyValue("keyGenerator", createLazyInitTargetSourceBeanDefinition(keyGeneratorRef));
        }
    }

    private BeanDefinition createLazyInitTargetSourceBeanDefinition(final String keyGeneratorRef) {

        BeanDefinitionBuilder targetSourceBuilder = BeanDefinitionBuilder
                .rootBeanDefinition(LazyInitTargetSource.class);
        targetSourceBuilder.addPropertyValue("targetBeanName", keyGeneratorRef);

        BeanDefinitionBuilder builder = BeanDefinitionBuilder.rootBeanDefinition(ProxyFactoryBean.class);
        builder.addPropertyValue("targetSource", targetSourceBuilder.getBeanDefinition());

        return builder.getBeanDefinition();
    }
}