com.predic8.membrane.core.graphql.CountingReader Maven / Gradle / Ivy
/* Copyright 2023 predic8 GmbH, www.predic8.com
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.predic8.membrane.core.graphql;
import java.io.IOException;
import java.io.Reader;
public class CountingReader extends Reader {
private final Reader reader;
private long markedPosition;
private long position;
public CountingReader(Reader reader) {
this.reader = reader;
}
@Override
public int read(char[] cbuf, int off, int len) throws IOException {
throw new RuntimeException("not implemented");
}
@Override
public int read() throws IOException {
int c = reader.read();
if (c != -1)
position++;
return c;
}
@Override
public void mark(int readAheadLimit) throws IOException {
reader.mark(readAheadLimit);
markedPosition = position;
}
@Override
public void reset() throws IOException {
reader.reset();
position = markedPosition;
}
@Override
public void close() throws IOException {
reader.close();
}
public long position() {
return position;
}
}