net.oneandone.sushi.io.CheckedByteArrayInputStream Maven / Gradle / Ivy

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/**
 * Copyright 1&1 Internet AG, https://github.com/1and1/
 *
 * 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 net.oneandone.sushi.io;

import java.io.ByteArrayInputStream;
import java.io.IOException;

public class CheckedByteArrayInputStream extends ByteArrayInputStream {
    private boolean closed = false;

    public CheckedByteArrayInputStream(byte[] buf) {
        super(buf);
    }

    @Override
    public int read() {
        ensureOpen();
        return super.read();
    }

    @Override
    public int read(byte b[], int off, int len) {
        ensureOpen();
        return super.read(b, off, len);
    }

    @Override
    public void close() throws IOException {
        closed = true;
        super.close();
    }
    
    public void ensureOpen() {
        if (closed) {
            throw new IllegalStateException();
        }
    }

}