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146 brianR 1
/*
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 *   Copyright 2013 Brian Rosenberger (Brutex Network)
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 *
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 *   Licensed under the Apache License, Version 2.0 (the "License");
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 *   you may not use this file except in compliance with the License.
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 *   You may obtain a copy of the License at
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 *
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 *       http://www.apache.org/licenses/LICENSE-2.0
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 *
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 *   Unless required by applicable law or agreed to in writing, software
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 *   distributed under the License is distributed on an "AS IS" BASIS,
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 *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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 *   See the License for the specific language governing permissions and
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 *   limitations under the License.
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*/
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package net.brutex.xservices.security;
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import net.brutex.xservices.ws.XmlService;
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import net.brutex.xservices.ws.rs.FileInfo;
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import org.apache.log4j.Logger;
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import org.apache.shiro.authz.Permission;
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import org.apache.shiro.authz.permission.InvalidPermissionStringException;
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/**
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 * @author Brian Rosenberger, bru(at)brutex.de
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 *
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 */
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public class PermissionResolver implements org.apache.shiro.authz.permission.PermissionResolver {
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	final Logger logger = Logger.getLogger(PermissionResolver.class);
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	private final String DELIMITER = "||";
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	@Override
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	public Permission resolvePermission(String permissionString) {
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		logger.debug(String.format("Trying to examine new Permission '%s'", permissionString));
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		if(! permissionString.contains(DELIMITER)) {
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			logger.error(String.format("Permission '%s' is missing permission class.", permissionString));
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			throw new InvalidPermissionStringException(String.format("Permission '%s' is missing permission class.", permissionString), permissionString);
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		}
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		int delimiterIndex = permissionString.indexOf(DELIMITER);
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		String value = permissionString.substring(0, delimiterIndex);
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		delimiterIndex = delimiterIndex + DELIMITER.length();
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		switch (value) {
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		case XmlService.SERVICE_NAME:
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			logger.debug(String.format("Found '%s' as permission class.", value));
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			return new XmlServicePermission(permissionString.substring( delimiterIndex ));
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		case FileInfo.SERVICE_NAME:
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			logger.debug(String.format("Found '%s' as permission class.", value));
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			return new DirectoryPermission(permissionString.substring( delimiterIndex ));
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		default:
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			logger.warn(String.format("Permission class '%s' is not defined.", value));
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			throw new InvalidPermissionStringException(String.format("Permission class '%s' is not defined.", value), permissionString);
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		}
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	}
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}