inti.ws.spring.resource.index.IndexConfig Maven / Gradle / Ivy

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An utility library for spring-based web-services for compressing / optimizing JS and CSS resources.
There is a newer version: 1.6
/**
 * Copyright 2012 the project-owners
 *
 *    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 inti.ws.spring.resource.index;

import inti.ws.spring.resource.FilteredWebResource;
import inti.ws.spring.resource.config.ConfigParser;
import inti.ws.spring.resource.config.ConfigParserSettings;

import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import javax.inject.Inject;
import javax.servlet.ServletContext;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.context.annotation.Scope;
import org.springframework.stereotype.Component;

import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;

@Component
@Scope("prototype")
public class IndexConfig implements ConfigParser {
    
    private static final Logger LOGGER = LoggerFactory.getLogger(IndexConfig.class);
    private static final Pattern DEPENDENCY_SCANNER = Pattern.compile("\\$(\\w+):(.+)");
    
    public static class IndexBean {
        
        String file;
        List dependencies;
        Map parameters;
        
        public List getDependencies() {
            return dependencies;
        }
        
        public void setDependencies(List dependencies) {
            this.dependencies = dependencies;
        }
        
        public String getFile() {
            return file;
        }
        
        public void setFile(String file) {
            this.file = file;
        }
        
        public Map getParameters() {
            return parameters;
        }
        
        public void setParameters(Map parameters) {
            this.parameters = parameters;
        }
        
    }
    
    @Inject
    ServletContext ctx;
    protected ConfigParserSettings settings;
    
    @Override
    public Map instanceWebResources(ObjectMapper mapper, JsonNode node) throws Exception {
        return parseIndex(mapper.convertValue(node, IndexBean.class));
    }
    
    @Override
    public void configureWebResources(ObjectMapper mapper, JsonNode node, Map resources,
            Map> resourceStack) throws Exception {
        IndexBean indexBean = mapper.convertValue(node, IndexBean.class);
        Entry entry = resources.entrySet().iterator().next();
        FilteredWebResource index = entry.getValue();
        Matcher matcher;
        String domain;
        String resource;
        Object value;
        
        for (String dependency : indexBean.getDependencies()) {
            matcher = DEPENDENCY_SCANNER.matcher(dependency);
            
            LOGGER.debug("configureWebResources - dependency={}", dependency);
            if (matcher.matches()) {
                domain = matcher.group(1);
                resource = matcher.group(2);
                
                LOGGER.debug("configureWebResources - domain={}, resource={}, resourceStack={}", new Object[] { domain,
                        resource, resourceStack });
                if (resourceStack.containsKey(domain)) {
                    if (resourceStack.get(domain).containsKey(resource)) {
                        index.getDependencies().add(resourceStack.get(domain).get(resource));
                    }
                }
            }
        }
        
        for (Map.Entry parameter : indexBean.getParameters().entrySet()) {
            matcher = DEPENDENCY_SCANNER.matcher(parameter.getValue());
            value = "";
            
            if (matcher.matches()) {
                domain = matcher.group(1);
                resource = matcher.group(2);
                
                if (resourceStack.containsKey(domain)) {
                    if (resourceStack.get(domain).containsKey(resource)) {
                        value = resourceStack.get(domain).get(resource);
                    }
                }
            } else {
                value = parameter.getValue();
            }
            index.getParameters().put(parameter.getKey(), value);
        }
        
        LOGGER.debug("configureWebResources - index.getParameters()={}, index.getDependencies()={}",
                index.getParameters(), index.getDependencies());
    }
    
    protected Map parseIndex(IndexBean indexBean) throws Exception {
        FilteredWebResource index;
        Map resources = new HashMap<>();
        
        index = new FilteredWebResource(ctx, indexBean.getFile());
        for (String route : settings.getRoutes()) {
            resources.put(route, index);
        }
        
        return resources;
    }
    
    @Override
    public ConfigParserSettings getConfigParserSettings() {
        return settings;
    }
    
    @Override
    public void setConfigParserSettings(ConfigParserSettings settings) {
        this.settings = settings;
    }
    
}