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/**
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* Copyright (C) 2007 EDIT
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* European Distributed Institute of Taxonomy
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* http://www.e-taxonomy.eu
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*
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* The contents of this file are subject to the Mozilla Public License Version 1.1
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* See LICENSE.TXT at the top of this package for the full license terms.
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*/
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package eu.etaxonomy.cdm.remote.view;
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import java.util.Arrays;
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import java.util.HashSet;
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import java.util.Locale;
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import java.util.Set;
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import org.springframework.beans.BeansException;
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import org.springframework.beans.factory.BeanFactory;
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import org.springframework.context.support.AbstractApplicationContext;
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import org.springframework.util.AntPathMatcher;
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import org.springframework.util.Assert;
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import org.springframework.util.PathMatcher;
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import org.springframework.web.servlet.View;
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import org.springframework.web.servlet.view.XmlViewResolver;
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/**
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* Resolves views by using a {@link PathMatcher} to match the view name to the bean names.
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*
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* Dy default the {@link AntPathMatcher} is used which supports Ant-style path patterns.
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* The mapping matches views using the following rules:
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* <ul>
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* <li>? matches one character
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* <li>* matches zero or more characters
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* <li>** matches zero or more 'directories' in a path
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* </ul>
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* @author ben.clark
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*/
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public class PatternViewResolver extends XmlViewResolver {
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private final Set<String> viewSet = new HashSet<String>();
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private PathMatcher pathMatcher = new AntPathMatcher();
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public void setPathMatcher(PathMatcher pathMatcher) {
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Assert.notNull(pathMatcher, "PathMatcher must not be null");
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this.pathMatcher = pathMatcher;
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}
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public PathMatcher getPathMatcher() {
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return this.pathMatcher;
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}
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@Override
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public View resolveViewName(String viewName, Locale locale) throws Exception {
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// Direct match?
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if (this.viewSet.contains(viewName)) {
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return super.resolveViewName(viewName, locale);
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}
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// Pattern match?
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String bestPathMatch = null;
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for (String registeredPath : this.viewSet) {
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if (getPathMatcher().match(registeredPath, viewName) &&
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(bestPathMatch == null || bestPathMatch.length() < registeredPath.length())) {
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bestPathMatch = registeredPath;
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}
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}
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if (bestPathMatch != null) {
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return super.resolveViewName(bestPathMatch, locale);
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}
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// No view found...
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return null;
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}
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@Override
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protected synchronized BeanFactory initFactory() throws BeansException {
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AbstractApplicationContext beanFactory = (AbstractApplicationContext)super.initFactory();
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String[] beanDefinitionNames = beanFactory.getBeanDefinitionNames();
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for(String beanDefinitionName : beanDefinitionNames) {
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viewSet.add(beanDefinitionName);
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viewSet.addAll(Arrays.asList(beanFactory.getAliases(beanDefinitionName)));
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}
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return beanFactory;
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}
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}
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