| /**************************************************************** |
| * 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.james.mime4j.io; |
| |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.nio.ByteBuffer; |
| |
| /** |
| * {@link InputStream} backed by byte array. |
| */ |
| class BinaryInputStream extends InputStream { |
| |
| private final ByteBuffer bbuf; |
| |
| BinaryInputStream(final ByteBuffer b) { |
| super(); |
| this.bbuf = b; |
| } |
| |
| @Override |
| public int read(byte[] b, int off, int len) throws IOException { |
| if (b == null) { |
| throw new NullPointerException(); |
| } |
| if (off < 0 || len < 0 || off + len > b.length) { |
| throw new IndexOutOfBoundsException(); |
| } |
| if (len == 0) { |
| return 0; |
| } |
| if (this.bbuf.hasRemaining()) { |
| int chunk = Math.min(this.bbuf.remaining(), len); |
| this.bbuf.get(b, off, chunk); |
| return chunk; |
| } else { |
| return -1; |
| } |
| } |
| |
| @Override |
| public int read() throws IOException { |
| if (this.bbuf.hasRemaining()) { |
| return this.bbuf.get() & 0xFF; |
| } else { |
| return -1; |
| } |
| } |
| |
| @Override |
| public int read(byte[] b) throws IOException { |
| return read(b, 0, b.length); |
| } |
| |
| @Override |
| public long skip(long n) throws IOException { |
| int skipped = 0; |
| while (n > 0 && this.bbuf.hasRemaining()) { |
| this.bbuf.get(); |
| n--; |
| skipped++; |
| } |
| return skipped; |
| } |
| |
| @Override |
| public int available() throws IOException { |
| return this.bbuf.remaining(); |
| } |
| |
| @Override |
| public void close() throws IOException { |
| } |
| |
| } |