| /* |
| * 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.harmony.xnet.provider.jsse; |
| |
| import java.nio.ByteBuffer; |
| |
| /** |
| * This class provides the DataStream functionality |
| * implemented over the array of ByteBuffer instances. |
| * Among with the data chunks read functionality |
| * it provides the info about amount of consumed data. |
| * The source ByteBuffer objects can be replaced by other. |
| * So one instance of this wrapper can be reused for several |
| * data sources. |
| */ |
| public class SSLEngineDataStream implements DataStream { |
| |
| private ByteBuffer[] srcs; |
| private int offset; |
| private int limit; |
| |
| private int available; |
| private int consumed; |
| |
| protected SSLEngineDataStream() {} |
| |
| protected void setSourceBuffers(ByteBuffer[] srcs, int offset, int length) { |
| this.srcs = srcs; |
| this.offset = offset; |
| this.limit = offset+length; |
| this.consumed = 0; |
| this.available = 0; |
| for (int i=offset; i<limit; i++) { |
| if (srcs[i] == null) { |
| throw new IllegalStateException( |
| "Some of the input parameters are null"); |
| } |
| available += srcs[i].remaining(); |
| } |
| } |
| |
| public int available() { |
| return available; |
| } |
| |
| public boolean hasData() { |
| return available > 0; |
| } |
| |
| public byte[] getData(int length) { |
| // TODO: optimization work: |
| // use ByteBuffer.get(byte[],int,int) |
| // and ByteBuffer.hasArray() methods |
| int len = (length < available) ? length : available; |
| available -= len; |
| consumed += len; |
| byte[] res = new byte[len]; |
| int pos = 0; |
| loop: |
| for (; offset<limit; offset++) { |
| while (srcs[offset].hasRemaining()) { |
| res[pos++] = srcs[offset].get(); |
| len --; |
| if (len == 0) { |
| break loop; |
| } |
| } |
| } |
| return res; |
| } |
| |
| protected int consumed() { |
| return consumed; |
| } |
| } |
| |