| /**************************************************************** |
| * 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.InputStream; |
| import java.nio.ByteBuffer; |
| import java.nio.charset.Charset; |
| |
| import org.apache.james.mime4j.Charsets; |
| import org.apache.james.mime4j.util.ByteArrayBuffer; |
| |
| /** |
| * Factory methods for {@link InputStream} instances backed by binary or textual data that attempt |
| * to minimize intermediate copying while streaming data. |
| */ |
| public final class InputStreams { |
| |
| private InputStreams() { |
| } |
| |
| public static InputStream create(final byte[] b, int off, int len) { |
| if (b == null) { |
| throw new IllegalArgumentException("Byte array may not be null"); |
| } |
| return new BinaryInputStream(ByteBuffer.wrap(b, off, len)); |
| } |
| |
| public static InputStream create(final byte[] b) { |
| if (b == null) { |
| throw new IllegalArgumentException("Byte array may not be null"); |
| } |
| return new BinaryInputStream(ByteBuffer.wrap(b)); |
| } |
| |
| public static InputStream create(final ByteArrayBuffer b) { |
| if (b == null) { |
| throw new IllegalArgumentException("Byte array may not be null"); |
| } |
| return new BinaryInputStream(ByteBuffer.wrap(b.buffer(), 0, b.length())); |
| } |
| |
| public static InputStream create(final ByteBuffer b) { |
| if (b == null) { |
| throw new IllegalArgumentException("Byte array may not be null"); |
| } |
| return new BinaryInputStream(b); |
| } |
| |
| public static InputStream createAscii(final CharSequence s) { |
| if (s == null) { |
| throw new IllegalArgumentException("CharSequence may not be null"); |
| } |
| return new TextInputStream(s, Charsets.US_ASCII, 1024); |
| } |
| |
| public static InputStream create(final CharSequence s, final Charset charset) { |
| if (s == null) { |
| throw new IllegalArgumentException("CharSequence may not be null"); |
| } |
| return new TextInputStream(s, charset != null ? charset : Charsets.DEFAULT_CHARSET, 1024); |
| } |
| |
| } |