| /* |
| * 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.commons.io.input; |
| |
| import java.io.Reader; |
| import java.util.Arrays; |
| import java.util.Collections; |
| import java.util.HashSet; |
| import java.util.Set; |
| import java.util.function.IntPredicate; |
| |
| /** |
| * A filter reader that removes a given set of characters represented as {@code int} code points, handy to remove known |
| * junk characters from CSV files for example. |
| * <p> |
| * This class must convert each {@code int} read to an {@link Integer}. You can increase the Integer cache with a system |
| * property, see {@link Integer}. |
| * </p> |
| */ |
| public class CharacterSetFilterReader extends AbstractCharacterFilterReader { |
| |
| private static IntPredicate toIntPredicate(final Set<Integer> skip) { |
| if (skip == null) { |
| return SKIP_NONE; |
| } |
| return c -> Collections.unmodifiableSet(skip).contains(Integer.valueOf(c)); |
| } |
| |
| /** |
| * Constructs a new reader. |
| * |
| * @param reader the reader to filter. |
| * @param skip the set of characters to filter out. |
| * @since 2.9.0 |
| */ |
| public CharacterSetFilterReader(final Reader reader, final Integer... skip) { |
| this(reader, new HashSet<>(Arrays.asList(skip))); |
| } |
| |
| /** |
| * Constructs a new reader. |
| * |
| * @param reader the reader to filter. |
| * @param skip the set of characters to filter out. |
| */ |
| public CharacterSetFilterReader(final Reader reader, final Set<Integer> skip) { |
| super(reader, toIntPredicate(skip)); |
| } |
| |
| } |