org.apache.pdfbox.pdfparser.RandomAccessSource Maven / Gradle / Ivy

Show more of this group Show more artifacts with this name
Show all versions of pdfbox Show documentation

The Apache PDFBox library is an open source Java tool for working with PDF documents.

There is a newer version: 3.0.2

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.apache.pdfbox.pdfparser;

import java.io.IOException;
import org.apache.pdfbox.io.RandomAccessRead;

/**
 * A SequentialSource backed by a RandomAccessRead.
 */
final class RandomAccessSource implements SequentialSource
{
    private final RandomAccessRead reader;

    /**
     * Constructor.
     * 
     * @param reader The random access reader to wrap.
     */
    RandomAccessSource(RandomAccessRead reader)
    {
        this.reader = reader;
    }

    @Override
    public int read() throws IOException
    {
        return reader.read();
    }

    @Override
    public int read(byte[] b) throws IOException
    {
        return reader.read(b);
    }

    @Override
    public int read(byte[] b, int offset, int length) throws IOException
    {
        return reader.read(b, offset, length);
    }

    @Override
    public long getPosition() throws IOException
    {
        return reader.getPosition();
    }

    @Override
    public int peek() throws IOException
    {
        return reader.peek();
    }

    @Override
    public void unread(int b) throws IOException
    {
        reader.rewind(1);
    }

    @Override
    public void unread(byte[] bytes) throws IOException
    {
        reader.rewind(bytes.length);
    }

    @Override
    public void unread(byte[] bytes, int start, int len) throws IOException
    {
        reader.rewind(len - start);
    }

    @Override
    public byte[] readFully(int length) throws IOException
    {
        return reader.readFully(length);
    }

    @Override
    public boolean isEOF() throws IOException
    {
        return reader.isEOF();
    }

    @Override
    public void close() throws IOException
    {
        reader.close();
    }
}