package org.jolokia.restrictor.policy;
/*
* Copyright 2009-2011 Roland Huss
*
* 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.
*/
import org.w3c.dom.Node;
/**
* Base class for all checkers
*
* @param <T> type used for checking the access
*
* @author roland
* @since 03.09.11
*/
public abstract class AbstractChecker<T> {
/**
* Verify that a given node has one of a set of expected node names
*
* @param pNode node to check
* @param pExpected list of expected node names
* @throws SecurityException if the node has none of the expected names
*/
protected void assertNodeName(Node pNode, String ... pExpected) {
for (String expected : pExpected) {
if (pNode.getNodeName().equals(expected)) {
return;
}
}
StringBuilder buffer = new StringBuilder();
for (int i=0; i < pExpected.length; i++) {
buffer.append(pExpected[i]);
if (i < pExpected.length-1) {
buffer.append(",");
}
}
throw new SecurityException(
"Expected element " + buffer.toString() + " but got " + pNode.getNodeName());
}
/**
* Check whether for the given argument access is allowed
*
* @param pArg argument (specific to each subclass)
* @return true if access is allowed, false otherwise
*/
public abstract boolean check(T pArg);
}