165 lines
5.1 KiB
Java
165 lines
5.1 KiB
Java
/*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.apache.commons.io.filefilter;
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import java.io.File;
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import java.io.Serializable;
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import java.util.ArrayList;
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import java.util.Collections;
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import java.util.Iterator;
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import java.util.List;
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/**
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* A {@link java.io.FileFilter} providing conditional OR logic across a list of
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* file filters. This filter returns <code>true</code> if any filters in the
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* list return <code>true</code>. Otherwise, it returns <code>false</code>.
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* Checking of the file filter list stops when the first filter returns
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* <code>true</code>.
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*
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* @since Commons IO 1.0
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* @version $Revision: 606381 $ $Date: 2007-12-22 02:03:16 +0000 (Sat, 22 Dec 2007) $
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*
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* @author Steven Caswell
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*/
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public class OrFileFilter
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extends AbstractFileFilter
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implements ConditionalFileFilter, Serializable {
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/** The list of file filters. */
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private List<IOFileFilter> fileFilters;
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/**
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* Constructs a new instance of <code>OrFileFilter</code>.
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*
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* @since Commons IO 1.1
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*/
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public OrFileFilter() {
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this.fileFilters = new ArrayList<IOFileFilter>();
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}
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/**
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* Constructs a new instance of <code>OrFileFilter</code>
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* with the specified filters.
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*
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* @param fileFilters the file filters for this filter, copied, null ignored
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* @since Commons IO 1.1
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*/
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public OrFileFilter(final List<IOFileFilter> fileFilters) {
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if (fileFilters == null) {
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this.fileFilters = new ArrayList<IOFileFilter>();
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} else {
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this.fileFilters = new ArrayList<IOFileFilter>(fileFilters);
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}
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}
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/**
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* Constructs a new file filter that ORs the result of two other filters.
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*
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* @param filter1 the first filter, must not be null
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* @param filter2 the second filter, must not be null
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* @throws IllegalArgumentException if either filter is null
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*/
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public OrFileFilter(IOFileFilter filter1, IOFileFilter filter2) {
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if (filter1 == null || filter2 == null) {
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throw new IllegalArgumentException("The filters must not be null");
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}
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this.fileFilters = new ArrayList<IOFileFilter>();
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addFileFilter(filter1);
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addFileFilter(filter2);
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}
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/**
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* {@inheritDoc}
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*/
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public void addFileFilter(final IOFileFilter ioFileFilter) {
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this.fileFilters.add(ioFileFilter);
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}
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/**
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* {@inheritDoc}
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*/
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public List<IOFileFilter> getFileFilters() {
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return Collections.unmodifiableList(this.fileFilters);
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}
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/**
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* {@inheritDoc}
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*/
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public boolean removeFileFilter(IOFileFilter ioFileFilter) {
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return this.fileFilters.remove(ioFileFilter);
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}
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/**
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* {@inheritDoc}
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*/
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public void setFileFilters(final List<IOFileFilter> fileFilters) {
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this.fileFilters = fileFilters;
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}
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/**
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* {@inheritDoc}
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*/
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@Override
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public boolean accept(final File file) {
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for (Iterator<IOFileFilter> iter = this.fileFilters.iterator(); iter.hasNext();) {
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IOFileFilter fileFilter = iter.next();
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if (fileFilter.accept(file)) {
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return true;
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}
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}
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return false;
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}
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/**
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* {@inheritDoc}
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*/
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@Override
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public boolean accept(final File file, final String name) {
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for (Iterator<IOFileFilter> iter = this.fileFilters.iterator(); iter.hasNext();) {
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IOFileFilter fileFilter = iter.next();
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if (fileFilter.accept(file, name)) {
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return true;
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}
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}
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return false;
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}
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/**
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* Provide a String representaion of this file filter.
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*
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* @return a String representaion
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*/
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@Override
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public String toString() {
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StringBuffer buffer = new StringBuffer();
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buffer.append(super.toString());
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buffer.append("(");
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if (fileFilters != null) {
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for (int i = 0; i < fileFilters.size(); i++) {
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if (i > 0) {
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buffer.append(",");
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}
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Object filter = fileFilters.get(i);
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buffer.append(filter == null ? "null" : filter.toString());
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}
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}
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buffer.append(")");
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return buffer.toString();
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}
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}
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