/*
* Copyright (C) 2014 Facebook, Inc.
*
* 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 com.facebook.tools.io;
class SingleCharSequence implements CharSequence {
private final char character;
SingleCharSequence(char character) {
this.character = character;
}
@Override
public int length() {
return 1;
}
@Override
public char charAt(int index) {
if (index < 0 || index > 1) {
throw new IndexOutOfBoundsException();
}
return character;
}
@Override
public CharSequence subSequence(int start, int end) {
if (start < 0 || end < 0 || start > end || end > 1) {
throw new IndexOutOfBoundsException();
}
return end == 0 ? "" : this;
}
@Override
public String toString() {
return Character.toString(character);
}
}