cloud.commandframework.brigadier.argument.QueueAsStringReader Maven / Gradle / Ivy
//
// MIT License
//
// Copyright (c) 2022 Alexander Söderberg & Contributors
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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package cloud.commandframework.brigadier.argument;
import com.mojang.brigadier.StringReader;
import java.util.Deque;
import java.util.Queue;
final class QueueAsStringReader extends StringReader {
private boolean closed;
private final Queue input;
QueueAsStringReader(final Queue input) {
super(String.join(" ", input));
this.input = input;
}
/**
* Update the underlying queue based on the reader state.
*
* Can only be run once.
*/
void updateQueue() {
if (this.closed) {
throw new IllegalStateException("double-closed");
}
this.closed = true;
/* Update elements in the queue to align it with the Brigadier cursor position */
int idx = this.getCursor();
while (idx > 0) {
final String next = this.input.element();
this.input.remove();
if (idx >= next.length()) {
idx -= next.length() + 1 /* whitespace */;
} else {
/* we've gotten to a partial word consumed by brigadier... let's try and modify the underlying queue */
if (!(this.input instanceof Deque)) {
throw new IllegalArgumentException();
}
((Deque) this.input).addFirst(next.substring(idx));
break;
}
}
}
}