/*
* Copyright 2010 Alibaba Group Holding Limited.
* All rights reserved.
*
* 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 com.alibaba.citrus.service.resource.impl;
import static com.alibaba.citrus.springext.util.DomUtil.*;
import static com.alibaba.citrus.springext.util.SpringExtUtil.*;
import static com.alibaba.citrus.util.StringUtil.*;
import java.io.IOException;
import java.net.URL;
import java.util.List;
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.xml.ParserContext;
import org.w3c.dom.Element;
import com.alibaba.citrus.springext.ConfigurationPoint;
import com.alibaba.citrus.springext.Contribution;
import com.alibaba.citrus.springext.ContributionAware;
import com.alibaba.citrus.springext.support.parser.AbstractNamedBeanDefinitionParser;
import com.alibaba.citrus.springext.util.DomUtil.ElementSelector;
/**
* ��������resource-loading����
*
* @author Michael Zhou
*/
public class ResourceLoadingServiceDefinitionParser extends
AbstractNamedBeanDefinitionParser<ResourceLoadingServiceImpl> implements ContributionAware {
private ConfigurationPoint loadersConfigurationPoint;
private ConfigurationPoint filtersConfigurationPoint;
public void setContribution(Contribution contrib) {
this.loadersConfigurationPoint = getSiblingConfigurationPoint("services/resource-loading/loaders", contrib);
this.filtersConfigurationPoint = getSiblingConfigurationPoint("services/resource-loading/filters", contrib);
}
@Override
protected void doParse(Element element, ParserContext parserContext, BeanDefinitionBuilder builder) {
parseBeanDefinitionAttributes(element, parserContext, builder);
URL configFileURL;
try {
configFileURL = parserContext.getReaderContext().getResource().getURL();
} catch (IOException e) {
configFileURL = null;
}
if (configFileURL != null) {
builder.addPropertyValue("configLocation", configFileURL);
}
ElementSelector resourceSelector = and(sameNs(element), name("resource")); // services:resource
ElementSelector resourceAliasSelector = and(sameNs(element), name("resource-alias")); // services:resource-alias
ElementSelector resourceFiltersSelector = and(sameNs(element), name("resource-filters")); // services:resource-filters
List<Object> resourceMappings = createManagedList(element, parserContext);
List<Object> filterMappings = createManagedList(element, parserContext);
for (Element subElement : subElements(element)) {
// <resource>
if (resourceSelector.accept(subElement)) {
resourceMappings.add(parseResource(subElement, parserContext));
}
// <resource-alias>
else if (resourceAliasSelector.accept(subElement)) {
resourceMappings.add(parseAlias(subElement, parserContext));
}
// <resource-filters>
else if (resourceFiltersSelector.accept(subElement)) {
filterMappings.add(parseFilters(subElement, parserContext));
}
}
builder.addPropertyValue("resourceMappings", resourceMappings);
builder.addPropertyValue("filterMappings", filterMappings);
String parentRef = trimToNull(element.getAttribute("parentRef"));
if (parentRef != null) {
builder.addPropertyValue("parent", new RuntimeBeanReference(parentRef));
}
}
private BeanDefinition parseResource(Element element, ParserContext parserContext) {
BeanDefinitionBuilder resourceMapping = BeanDefinitionBuilder
.genericBeanDefinition(ResourceLoaderMapping.class);
resourceMapping.addPropertyValue("patternName", trimToNull(element.getAttribute("pattern")));
attributesToProperties(element, resourceMapping, "internal");
List<Object> loaders = createManagedList(element, parserContext);
for (Element subElement : subElements(element)) {
loaders.add(parseConfigurationPointBean(subElement, loadersConfigurationPoint, parserContext,
resourceMapping));
}
resourceMapping.addPropertyValue("loaders", loaders);
return resourceMapping.getBeanDefinition();
}
private BeanDefinition parseAlias(Element element, ParserContext parserContext) {
BeanDefinitionBuilder resourceMapping = BeanDefinitionBuilder.genericBeanDefinition(ResourceAlias.class);
resourceMapping.addPropertyValue("patternName", trimToNull(element.getAttribute("pattern")));
attributesToProperties(element, resourceMapping, "internal", "name");
return resourceMapping.getBeanDefinition();
}
private BeanDefinition parseFilters(Element element, ParserContext parserContext) {
BeanDefinitionBuilder resourceFilterMapping = BeanDefinitionBuilder
.genericBeanDefinition(ResourceFilterMapping.class);
resourceFilterMapping.addPropertyValue("patternName", trimToNull(element.getAttribute("pattern")));
List<Object> filters = createManagedList(element, parserContext);
for (Element subElement : subElements(element)) {
filters.add(parseConfigurationPointBean(subElement, filtersConfigurationPoint, parserContext,
resourceFilterMapping));
}
resourceFilterMapping.addPropertyValue("filters", filters);
return resourceFilterMapping.getBeanDefinition();
}
@Override
protected String getDefaultName() {
return ResourceLoadingServiceImpl.DEFAULT_NAME;
}
}