| /* |
| * ==================================================================== |
| * 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. |
| * ==================================================================== |
| * |
| * This software consists of voluntary contributions made by many |
| * individuals on behalf of the Apache Software Foundation. For more |
| * information on the Apache Software Foundation, please see |
| * <http://www.apache.org/>. |
| * |
| */ |
| |
| package org.apache.hc.core5.reactor.ssl; |
| |
| import java.nio.ByteBuffer; |
| |
| import org.apache.hc.core5.util.Args; |
| |
| abstract class SSLManagedBuffer { |
| |
| /** |
| * Allocates the resources required for this buffer, or returns the resources already allocated for this buffer. |
| * Unless {@link #release() } is called, multiple invocations to this method must return the same |
| * {@link java.nio.ByteBuffer}. |
| * @return buffer |
| */ |
| abstract ByteBuffer acquire(); |
| /** |
| * Releases the resources for this buffer. If the buffer has already been released, this method does nothing. |
| */ |
| abstract void release(); |
| /** |
| * Tests to see if this buffer has been acquired. |
| * @return {@code true} if the buffer is acquired, otherwise {@code false} |
| */ |
| abstract boolean isAcquired(); |
| /** |
| * Tests to make sure that the buffer has been acquired and the underlying buffer has a position larger than |
| * {@code 0}. Essentially the same as {@code isAquired() && acquire().position > 0}. |
| * @return {@code true} if the buffer has been acquired and the underlying buffer's position is {@code > 0}, |
| * otherwise {@code false} |
| */ |
| abstract boolean hasData(); |
| |
| static SSLManagedBuffer create(final SSLBufferMode mode, final int size) { |
| return mode == SSLBufferMode.DYNAMIC ? new DynamicBuffer(size) : new StaticBuffer(size); |
| } |
| |
| static final class StaticBuffer extends SSLManagedBuffer { |
| |
| private final ByteBuffer buffer; |
| |
| public StaticBuffer(final int size) { |
| Args.positive(size, "size"); |
| buffer = ByteBuffer.allocate(size); |
| } |
| |
| @Override |
| public ByteBuffer acquire() { |
| return buffer; |
| } |
| |
| @Override |
| public void release() { |
| // do nothing |
| } |
| |
| @Override |
| public boolean isAcquired() { |
| return true; |
| } |
| |
| @Override |
| public boolean hasData() { |
| return buffer.position() > 0; |
| } |
| |
| } |
| |
| static final class DynamicBuffer extends SSLManagedBuffer { |
| |
| private ByteBuffer wrapped; |
| private final int length; |
| |
| public DynamicBuffer(final int size) { |
| Args.positive(size, "size"); |
| this.length = size; |
| } |
| |
| @Override |
| public ByteBuffer acquire() { |
| if (wrapped != null) { |
| return wrapped; |
| } |
| wrapped = ByteBuffer.allocate(length); |
| return wrapped; |
| } |
| |
| @Override |
| public void release() { |
| wrapped = null; |
| } |
| |
| @Override |
| public boolean isAcquired() { |
| return wrapped != null; |
| } |
| |
| @Override |
| public boolean hasData() { |
| return wrapped != null && wrapped.position() > 0; |
| } |
| |
| } |
| |
| } |