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• ParsingUtils.java

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org.springframework.data.gemfire.config.ParsingUtils Maven / Gradle / Ivy

/*
 * Copyright 2010-2013 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.data.gemfire.config;

import java.util.List;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.beans.PropertyValue;
import org.springframework.beans.factory.config.BeanDefinition;
import org.springframework.beans.factory.config.RuntimeBeanReference;
import org.springframework.beans.factory.support.BeanDefinitionBuilder;
import org.springframework.beans.factory.support.ManagedList;
import org.springframework.beans.factory.xml.ParserContext;
import org.springframework.core.Conventions;
import org.springframework.data.gemfire.EvictionAttributesFactoryBean;
import org.springframework.data.gemfire.ExpirationAttributesFactoryBean;
import org.springframework.data.gemfire.GemfireUtils;
import org.springframework.data.gemfire.SubscriptionAttributesFactoryBean;
import org.springframework.util.StringUtils;
import org.springframework.util.xml.DomUtils;
import org.w3c.dom.Element;

import com.gemstone.gemfire.cache.LossAction;
import com.gemstone.gemfire.cache.MembershipAttributes;
import com.gemstone.gemfire.cache.ResumptionAction;

/**
 * Utilities used by the Spring Data GemFire XML Namespace parsers.
 *
 * @author Costin Leau
 * @author David Turanski
 * @author Lyndon Adams
 * @author John Blum
 */
abstract class ParsingUtils {

	private static final Log log = LogFactory.getLog(ParsingUtils.class);

	protected static final String CACHE_PROPERTY_NAME = "cache";
	protected static final String REGION_PROPERTY_NAME = "region";
	protected static final String CACHE_REF_ATTRIBUTE_NAME = "cache-ref";
	protected static final String REGION_REF_ATTRIBUTE_NAME = "region-ref";

	static void setPropertyReference(Element element, BeanDefinitionBuilder builder, String attributeName,
			String propertyName) {

		String attributeValue = element.getAttribute(attributeName);

		if (StringUtils.hasText(attributeValue)) {
			builder.addPropertyReference(propertyName, attributeValue);
		}
	}

	@SuppressWarnings("unused")
	static void setPropertyReference(Element element, BeanDefinitionBuilder builder, String attributeName) {
		setPropertyReference(element, builder, attributeName, Conventions.attributeNameToPropertyName(attributeName));
	}

	static void setPropertyValue(Element element, BeanDefinitionBuilder builder, String attributeName,
			String propertyName, Object defaultValue) {

		String attributeValue = element.getAttribute(attributeName);

		if (StringUtils.hasText(attributeValue)) {
			builder.addPropertyValue(propertyName, attributeValue);
		}
		else if (defaultValue != null) {
			builder.addPropertyValue(propertyName, defaultValue);
		}
	}

	static void setPropertyValue(Element element, BeanDefinitionBuilder builder, String attributeName,
			String propertyName) {
		setPropertyValue(element, builder, attributeName, propertyName, null);
	}

	static void setPropertyValue(Element element, BeanDefinitionBuilder builder, String attributeName) {
		setPropertyValue(element, builder, attributeName, Conventions.attributeNameToPropertyName(attributeName));
	}

	static void setPropertyValue(BeanDefinitionBuilder builder, BeanDefinition source, String propertyName,
			boolean withDependsOn) {

		PropertyValue propertyValue = source.getPropertyValues().getPropertyValue(propertyName);

		if (propertyValue != null) {
			builder.addPropertyValue(propertyValue.getName(), propertyValue.getValue());

			if (withDependsOn && propertyValue.getValue() instanceof RuntimeBeanReference) {
				builder.addDependsOn(((RuntimeBeanReference) propertyValue.getValue()).getBeanName());
			}
		}
	}

	static void setPropertyValue(BeanDefinitionBuilder builder, BeanDefinition source, String propertyName) {
		setPropertyValue(builder, source, propertyName, false);
	}

	/**
	 * Utility method handling parsing of nested definition of the type:
	 * 
	 * 
	 *   
	 * 
	 * 
	 * or
	 * 
	 * 
	 *   
	 *     
	 *   
	 * 
	 * 
	 * @param element the XML element.
	 * @return Bean reference or nested Bean definition.
	 */
	static Object parseRefOrNestedBeanDeclaration(ParserContext parserContext, Element element,
			BeanDefinitionBuilder builder) {
		return parseRefOrNestedBeanDeclaration(parserContext, element, builder, "ref", false);
	}

	static Object getBeanReference(ParserContext parserContext, Element element, String refAttributeName) {
		String refAttributeValue = element.getAttribute(refAttributeName);
		Object returnValue = null;

		if (StringUtils.hasText(refAttributeValue)) {
			if (!DomUtils.getChildElements(element).isEmpty()) {
				parserContext.getReaderContext().error(String.format(
					"Use either the '%1$s' attribute or a nested bean declaration for '%2$s' element, but not both.",
						refAttributeName, element.getLocalName()), element);
			}

			returnValue = new RuntimeBeanReference(refAttributeValue);
		}

		return returnValue;
	}

	static Object parseRefOrNestedCustomElement(ParserContext parserContext, Element element,
			BeanDefinitionBuilder builder) {
		Object beanRef = ParsingUtils.getBeanReference(parserContext, element, "bean");
		return (beanRef != null ? beanRef : parserContext.getDelegate().parseCustomElement(
			element, builder.getBeanDefinition()));
	}

	static Object parseRefOrSingleNestedBeanDeclaration(ParserContext parserContext, Element element,
			BeanDefinitionBuilder builder) {
		return parseRefOrNestedBeanDeclaration(parserContext, element, builder, "ref", true);
	}

	static Object parseRefOrNestedBeanDeclaration(ParserContext parserContext, Element element,
			BeanDefinitionBuilder builder, String refAttributeName) {
		return parseRefOrNestedBeanDeclaration(parserContext, element, builder, refAttributeName, false);
	}

	static Object parseRefOrNestedBeanDeclaration(ParserContext parserContext, Element element,
			BeanDefinitionBuilder builder, String refAttributeName, boolean single) {

		Object beanReference = getBeanReference(parserContext, element, refAttributeName);

		if (beanReference != null) {
			return beanReference;
		}

		// check nested declarations
		List childElements = DomUtils.getChildElements(element);

		// parse nested bean definition
		if (childElements.size() == 1) {
			return parserContext.getDelegate().parsePropertySubElement(childElements.get(0),
					builder.getRawBeanDefinition());
		}
		else {
			// TODO also triggered when there are no child elements; need to change the message...
			if (single) {
				parserContext.getReaderContext().error(String.format(
					"The element '%1$s' does not support multiple nested bean definitions.",
						element.getLocalName()), element);
			}
		}

		ManagedList