| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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 org.apache.ranger.plugin.resourcematcher; |
| |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| import org.apache.ranger.plugin.util.StringTokenReplacer; |
| |
| import java.io.Serializable; |
| import java.util.Collection; |
| import java.util.Comparator; |
| import java.util.Map; |
| |
| abstract class ResourceMatcher { |
| private static final Log LOG = LogFactory.getLog(ResourceMatcher.class); |
| |
| protected final String value; |
| protected StringTokenReplacer tokenReplacer; |
| |
| static final int DYNAMIC_EVALUATION_PENALTY = 8; |
| |
| ResourceMatcher(String value) { this.value = value; } |
| |
| abstract boolean isMatch(String resourceValue, Map<String, Object> evalContext); |
| abstract int getPriority(); |
| |
| boolean isMatchAny() { return value != null && value.length() == 0; } |
| |
| boolean getNeedsDynamicEval() { |
| return tokenReplacer != null; |
| } |
| |
| public boolean isMatchAny(Collection<String> resourceValues, Map<String, Object> evalContext) { |
| if (resourceValues != null) { |
| for (String resourceValue : resourceValues) { |
| if (isMatch(resourceValue, evalContext)) { |
| return true; |
| } |
| } |
| } |
| |
| return false; |
| } |
| |
| @Override |
| public String toString() { |
| return this.getClass().getName() + "(" + this.value + ")"; |
| } |
| |
| void setDelimiters(char startDelimiterChar, char endDelimiterChar, char escapeChar, String tokenPrefix) { |
| if(LOG.isDebugEnabled()) { |
| LOG.debug("==> setDelimiters(value= " + value + ", startDelimiter=" + startDelimiterChar + |
| ", endDelimiter=" + endDelimiterChar + ", escapeChar=" + escapeChar + ", prefix=" + tokenPrefix); |
| } |
| |
| if(value != null && (value.indexOf(escapeChar) != -1 || (value.indexOf(startDelimiterChar) != -1 && value.indexOf(endDelimiterChar) != -1))) { |
| tokenReplacer = new StringTokenReplacer(startDelimiterChar, endDelimiterChar, escapeChar, tokenPrefix); |
| } |
| |
| if(LOG.isDebugEnabled()) { |
| LOG.debug("<== setDelimiters(value= " + value + ", startDelimiter=" + startDelimiterChar + |
| ", endDelimiter=" + endDelimiterChar + ", escapeChar=" + escapeChar + ", prefix=" + tokenPrefix); |
| } |
| } |
| |
| String getExpandedValue(Map<String, Object> evalContext) { |
| final String ret; |
| |
| if(tokenReplacer != null) { |
| ret = tokenReplacer.replaceTokens(value, evalContext); |
| } else { |
| ret = value; |
| } |
| |
| return ret; |
| } |
| |
| public static class PriorityComparator implements Comparator<ResourceMatcher>, Serializable { |
| @Override |
| public int compare(ResourceMatcher me, ResourceMatcher other) { |
| return Integer.compare(me.getPriority(), other.getPriority()); |
| } |
| } |
| } |