org.archive.util.InterruptibleCharSequence Maven / Gradle / Ivy
/*
* This file is part of the Heritrix web crawler (crawler.archive.org).
*
* Licensed to the Internet Archive (IA) by one or more individual
* contributors.
*
* The IA 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.archive.util;
/**
* CharSequence that noticed thread interrupts -- as might be necessary
* to recover from a loose regex on unexpected challenging input.
*
* @author gojomo
*/
public class InterruptibleCharSequence implements CharSequence {
protected CharSequence inner;
// public long counter = 0;
public InterruptibleCharSequence(CharSequence inner) {
super();
this.inner = inner;
}
public char charAt(int index) {
if (Thread.interrupted()) { // clears flag if set
throw new RuntimeException(new InterruptedException());
}
// counter++;
return inner.charAt(index);
}
public int length() {
return inner.length();
}
public CharSequence subSequence(int start, int end) {
return new InterruptibleCharSequence(inner.subSequence(start, end));
}
@Override
public String toString() {
return inner.toString();
}
}