io.questdb.std.str.FlyweightCharSequence 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.
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package io.questdb.std.str;
import io.questdb.std.Mutable;
import io.questdb.std.ObjectFactory;
public class FlyweightCharSequence extends AbstractCharSequence implements Mutable {
public static final ObjectFactory FACTORY = FlyweightCharSequence::new;
private CharSequence delegate;
private int lo;
private int len = -1;
@Override
public void clear() {
}
@Override
public int length() {
return len;
}
@Override
public char charAt(int index) {
return delegate.charAt(index + lo);
}
public FlyweightCharSequence of(CharSequence delegate) {
return of(delegate, 0, delegate.length());
}
public FlyweightCharSequence of(CharSequence delegate, int lo, int len) {
this.delegate = delegate;
this.lo = lo;
this.len = len;
return this;
}
public FlyweightCharSequence ofQuoted(CharSequence delegate) {
return of(delegate, 1, delegate.length() - 2);
}
}