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/*
* Copyright 2010 Lincoln Baxter, III
*
* 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.ocpsoft.pretty.faces.config;
import java.io.IOException;
import java.io.InputStream;
import org.apache.commons.beanutils.ConvertUtils;
import org.apache.commons.beanutils.Converter;
import org.apache.commons.digester.Digester;
import org.xml.sax.SAXException;
import com.ocpsoft.pretty.faces.annotation.URLAction.PhaseId;
import com.ocpsoft.pretty.faces.config.convert.CaseConverter;
import com.ocpsoft.pretty.faces.config.convert.PhaseIdConverter;
import com.ocpsoft.pretty.faces.config.convert.RedirectConverter;
import com.ocpsoft.pretty.faces.config.convert.TrailingSlashConverter;
import com.ocpsoft.pretty.faces.config.mapping.PathValidator;
import com.ocpsoft.pretty.faces.config.mapping.QueryParameter;
import com.ocpsoft.pretty.faces.config.mapping.UrlAction;
import com.ocpsoft.pretty.faces.config.mapping.UrlMapping;
import com.ocpsoft.pretty.faces.config.rewrite.Case;
import com.ocpsoft.pretty.faces.config.rewrite.Redirect;
import com.ocpsoft.pretty.faces.config.rewrite.RewriteRule;
import com.ocpsoft.pretty.faces.config.rewrite.TrailingSlash;
/**
* Digester-based implementation of {@link PrettyConfigParser}.
*/
public class DigesterPrettyConfigParser implements PrettyConfigParser
{
private final Converter caseConverter = new CaseConverter();
private final Converter trailingSlashConverter = new TrailingSlashConverter();
private final Converter phaseIdConverter = new PhaseIdConverter();
private final Converter redirectConverter = new RedirectConverter();
public void parse(final PrettyConfigBuilder builder, final InputStream resource) throws IOException, SAXException
{
if (builder == null)
{
throw new IllegalArgumentException("Builder must not be null.");
}
if (resource == null)
{
throw new IllegalArgumentException("Input stream must not be null.");
}
final Digester digester = configureDigester(new Digester());
ConvertUtils.register(caseConverter, Case.class);
ConvertUtils.register(trailingSlashConverter, TrailingSlash.class);
ConvertUtils.register(phaseIdConverter, PhaseId.class);
ConvertUtils.register(redirectConverter, Redirect.class);
digester.push(builder);
digester.parse(resource);
}
/**
* Configure the digester. Assume that the builder object will be pushed
* after this method is called.
*/
private Digester configureDigester(final Digester digester)
{
/*
* We use the context class loader to resolve classes. This fixes
* ClassNotFoundExceptions on Geronimo.
*/
digester.setUseContextClassLoader(true);
/*
* Parse RewriteRules
*/
digester.addObjectCreate("pretty-config/rewrite", RewriteRule.class);
digester.addSetProperties("pretty-config/rewrite");
digester.addSetNext("pretty-config/rewrite", "addRewriteRule");
/*
* Create Mapping Object
*/
digester.addObjectCreate("pretty-config/url-mapping", UrlMapping.class);
digester.addSetProperties("pretty-config/url-mapping");
digester.addCallMethod("pretty-config/url-mapping/pattern", "setPattern", 1);
digester.addCallParam("pretty-config/url-mapping/pattern", 0, "value");
digester.addCallMethod("pretty-config/url-mapping/pattern", "setPattern", 0);
/*
* Parse View Id
*/
digester.addCallMethod("pretty-config/url-mapping/view-id", "setViewId", 1);
digester.addCallParam("pretty-config/url-mapping/view-id", 0, "value");
digester.addCallMethod("pretty-config/url-mapping/view-id", "setViewId", 0);
/*
* Parse Path Validators
*/
digester.addObjectCreate("pretty-config/url-mapping/pattern/validate", PathValidator.class);
digester.addSetProperties("pretty-config/url-mapping/pattern/validate");
digester.addSetNext("pretty-config/url-mapping/pattern/validate", "addPathValidator");
/*
* Parse Query Params
*/
digester.addObjectCreate("pretty-config/url-mapping/query-param", QueryParameter.class);
digester.addSetProperties("pretty-config/url-mapping/query-param");
digester.addCallMethod("pretty-config/url-mapping/query-param", "setExpression", 0);
digester.addSetNext("pretty-config/url-mapping/query-param", "addQueryParam");
/*
* Parse Action Methods
*/
digester.addObjectCreate("pretty-config/url-mapping/action", UrlAction.class);
digester.addSetProperties("pretty-config/url-mapping/action");
digester.addCallMethod("pretty-config/url-mapping/action", "setAction", 0);
digester.addSetNext("pretty-config/url-mapping/action", "addAction");
/*
* Add Mapping to Builder
*/
digester.addSetNext("pretty-config/url-mapping", "addMapping");
return digester;
}
}
