org.flywaydb.core.internal.util.BomStrippingReader Maven / Gradle / Ivy
/*
* Copyright (C) Red Gate Software Ltd 2010-2024
*
* 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 org.flywaydb.core.internal.util;
import java.io.FilterReader;
import java.io.IOException;
import java.io.Reader;
/**
* Reader that strips the BOM at the beginning of a stream.
*/
public class BomStrippingReader extends FilterReader {
private static final int EMPTY_STREAM = -1;
/**
* Creates a new BOM-stripping reader.
*
* @param in a Reader object providing the underlying stream.
* @throws NullPointerException if in
is null
*/
public BomStrippingReader(Reader in) {
super(in);
}
@Override
public int read() throws IOException {
int c = super.read();
if (c != EMPTY_STREAM && BomFilter.isBom((char) c)) {
// Skip BOM
return super.read();
}
return c;
}
}