com.hierynomus.smbj.io.InputStreamByteChunkProvider Maven / Gradle / Ivy

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SMB2 protocol library for communication with Windows servers

There is a newer version: 0.13.0

/*
 * Copyright (C)2016 - SMBJ Contributors
 *
 * 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.hierynomus.smbj.io;

import com.hierynomus.smbj.common.SMBRuntimeException;

import java.io.BufferedInputStream;
import java.io.IOException;
import java.io.InputStream;

public class InputStreamByteChunkProvider extends ByteChunkProvider {

    private BufferedInputStream is;

    public InputStreamByteChunkProvider(InputStream is) {
        if (is instanceof BufferedInputStream)
            this.is = (BufferedInputStream) is;
        else
            this.is = new BufferedInputStream(is);
    }

    @Override
    protected int getChunk(byte[] chunk) throws IOException {
        if (is == null) {
            return -1;
        }
        int count = 0;
        int read;
        while (count < CHUNK_SIZE && ((read = is.read(chunk, count, CHUNK_SIZE - count)) != -1)) {
            count += read;
        }
        return count;
    }

    @Override
    public int bytesLeft() {
        try {
            if (is != null) {
                return is.available();
            } else {
                return -1;
            }
        } catch (IOException e) {
            throw new SMBRuntimeException(e);
        }
    }

    @Override
    public boolean isAvailable() {
        return bytesLeft() > 0;
    }

    @Override
    public void close() throws IOException {
        if (is != null) {
            try {
                is.close();
            } finally {
                is = null;
            }
        }
    }
}