| /* |
| * 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.tamaya.spisupport; |
| |
| import org.apache.tamaya.spi.FilterContext; |
| import org.apache.tamaya.spi.PropertyFilter; |
| import org.apache.tamaya.spi.PropertyValue; |
| |
| import java.util.Arrays; |
| import java.util.List; |
| |
| /** |
| * Predicate filtering using a regex expression operating on the key. It allows either |
| * to define the target keys to be selected (includes), or to be excluded (excludes). |
| */ |
| public final class RegexPropertyFilter implements PropertyFilter { |
| /** The expression used to include entries that match. */ |
| private List<String> includes; |
| /** The expression used to exclude entries that match. */ |
| private List<String> excludes; |
| |
| /** |
| * Sets the regex expression to be applied on the key to filter the corresponding entry |
| * if matching. |
| * @param expressions the regular expression for inclusion, not null. |
| */ |
| public void setIncludes(String... expressions){ |
| this.includes = Arrays.asList(expressions); |
| } |
| |
| /** |
| * Sets the regex expression to be applied on the key to remove the corresponding entries |
| * if matching. |
| * @param expressions the regular expressions for exclusion, not null. |
| */ |
| public void setExcludes(String... expressions){ |
| this.excludes= Arrays.asList(expressions); |
| } |
| |
| @Override |
| public PropertyValue filterProperty(PropertyValue valueToBeFiltered, FilterContext context) { |
| if(includes!=null){ |
| for(String expression:includes){ |
| if(valueToBeFiltered.getQualifiedKey().matches(expression)){ |
| return valueToBeFiltered; |
| } |
| } |
| return null; |
| } |
| if(excludes!=null){ |
| for(String expression:excludes){ |
| if(valueToBeFiltered.getQualifiedKey().matches(expression)){ |
| return null; |
| } |
| } |
| } |
| return valueToBeFiltered; |
| } |
| |
| @Override |
| public String toString() { |
| return "RegexPropertyFilter{" + |
| "includes='" + includes + '\'' + |
| "excludes='" + excludes + '\'' + |
| '}'; |
| } |
| |
| } |