io.questdb.std.str.FileNameExtractorCharSequence Maven / Gradle / Ivy
/*******************************************************************************
* ___ _ ____ ____
* / _ \ _ _ ___ ___| |_| _ \| __ )
* | | | | | | |/ _ \/ __| __| | | | _ \
* | |_| | |_| | __/\__ \ |_| |_| | |_) |
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*
* Copyright (c) 2014-2019 Appsicle
* Copyright (c) 2019-2020 QuestDB
*
* Licensed 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 io.questdb.std.str;
import io.questdb.std.ThreadLocal;
public class FileNameExtractorCharSequence extends AbstractCharSequence {
private final static ThreadLocal SINGLETON =
new ThreadLocal<>(FileNameExtractorCharSequence::new);
private static final char separator;
static {
separator = System.getProperty("file.separator").charAt(0);
}
private CharSequence base;
private int lo;
private int hi;
public static CharSequence get(CharSequence that) {
return SINGLETON.get().of(that);
}
@Override
public int length() {
return hi - lo;
}
@Override
public char charAt(int index) {
return base.charAt(lo + index);
}
public CharSequence of(CharSequence base) {
this.base = base;
this.hi = base.length();
this.lo = 0;
for (int i = hi - 1; i > -1; i--) {
if (base.charAt(i) == separator) {
this.lo = i + 1;
break;
}
}
return this;
}
}