/*
* 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.util.ArrayUtil.*;
import java.util.Set;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.alibaba.citrus.service.resource.Resource;
import com.alibaba.citrus.service.resource.ResourceFilter;
import com.alibaba.citrus.service.resource.ResourceFilterChain;
import com.alibaba.citrus.service.resource.ResourceLoadingOption;
import com.alibaba.citrus.service.resource.ResourceMatchResult;
import com.alibaba.citrus.service.resource.ResourceNotFoundException;
import com.alibaba.citrus.util.internal.ToStringBuilder;
import com.alibaba.citrus.util.internal.ToStringBuilder.MapBuilder;
public class ResourceFilterMapping extends ResourcePattern {
private final static Logger log = LoggerFactory.getLogger(ResourceFilterMapping.class);
private ResourceFilter[] filters;
public ResourceFilter[] getFilters() {
return filters;
}
public void setFilters(ResourceFilter[] filters) {
this.filters = filters;
}
@Override
public String getPatternType() {
return "resource-filters";
}
@Override
protected void init() {
if (filters == null) {
filters = new ResourceFilter[0];
}
for (ResourceFilter filter : filters) {
filter.init(getResourceLoadingService());
}
}
/**
* ȡ������ִ��filter������
*/
public ResourceFilterChain getResourceFilterChain(final ResourceFilterChain root) {
if (isEmptyArray(filters)) {
return root;
}
return new ResourceFilterChain() {
private int i = 0;
public Resource doFilter(ResourceMatchResult filterMatchResult, Set<ResourceLoadingOption> options)
throws ResourceNotFoundException {
ResourceFilter filter;
if (i < filters.length) {
filter = filters[i++];
String resourceName = filterMatchResult.getResourceName();
log.debug("Applying filter to resource \"{}\": {}", resourceName, filter);
return filter.doFilter(filterMatchResult, options, this);
} else {
return root.doFilter(filterMatchResult, options);
}
}
};
}
@Override
public String toString() {
MapBuilder mb = new MapBuilder();
mb.append("pattern", getPatternName());
mb.append("filters", getFilters());
return new ToStringBuilder().append(getClass().getSimpleName()).append(mb).toString();
}
}