Java tutorial
/* * 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.util.Map; abstract class ResourceMatcher implements Comparable<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; } @Override public int compareTo(ResourceMatcher other) { return Integer.compare(getPriority(), other.getPriority()); } @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; } }