| /* |
| * |
| * 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.qpid.server.protocol.v1_0.codec; |
| |
| import org.apache.qpid.bytebuffer.QpidByteBuffer; |
| |
| public abstract class FixedSixteenWriter<T extends Object> implements ValueWriter<T> |
| { |
| private int _written = 17; |
| private long _msb; |
| private long _lsb; |
| |
| public final int writeToBuffer(QpidByteBuffer buffer) |
| { |
| int remaining = buffer.remaining(); |
| int written = _written; |
| switch(written) |
| { |
| case 0: |
| if(buffer.hasRemaining()) |
| { |
| buffer.put(getFormatCode()); |
| remaining--; |
| written = 1; |
| } |
| else |
| { |
| break; |
| } |
| case 1: |
| if(remaining>=8) |
| { |
| buffer.putLong(_msb); |
| written = 9; |
| break; |
| } |
| case 2: |
| case 3: |
| case 4: |
| case 5: |
| if(remaining >= 4) |
| { |
| buffer.putInt((int)((_msb >> ((5-written)<<3)) & 0xFFFFFFFF )); |
| remaining-=4; |
| written+=4; |
| } |
| case 6: |
| case 7: |
| if(remaining >= 2 && written <= 7) |
| { |
| buffer.putShort((short)((_msb >> ((7-written)<<3)) & 0xFFFF )); |
| remaining -= 2; |
| written += 2; |
| } |
| case 8: |
| if(remaining >=1 && written != 9) |
| { |
| buffer.put((byte)((_msb >> ((8-written)<<3)) & 0xFF )); |
| written++; |
| } |
| |
| |
| } |
| if(remaining != 0) |
| { |
| switch(written) |
| { |
| case 9: |
| if(remaining>=8) |
| { |
| buffer.putLong(_lsb); |
| written = 17; |
| break; |
| } |
| case 10: |
| case 11: |
| case 12: |
| case 13: |
| if(remaining >= 4) |
| { |
| buffer.putInt((int)((_lsb >> ((13-written)<<3)) & 0xFFFFFFFF )); |
| remaining-=4; |
| written+=4; |
| } |
| case 14: |
| case 15: |
| if(remaining >= 2 && written <= 15) |
| { |
| buffer.putShort((short)((_lsb >> ((15-written)<<3)) & 0xFFFF )); |
| remaining -= 2; |
| written += 2; |
| } |
| case 16: |
| if(remaining >=1 && written != 17) |
| { |
| buffer.put((byte)((_msb >> ((16-written)<<3)) & 0xFF )); |
| written++; |
| } |
| } |
| |
| } |
| |
| _written = written; |
| |
| return 17; |
| } |
| |
| abstract byte getFormatCode(); |
| |
| public final void setValue(T value) |
| { |
| _written = 0; |
| _msb = convertValueToMSB(value); |
| _lsb = convertValueToLSB(value); |
| } |
| |
| abstract long convertValueToMSB(T value); |
| abstract long convertValueToLSB(T value); |
| |
| public boolean isCacheable() |
| { |
| return true; |
| } |
| |
| public final boolean isComplete() |
| { |
| return _written == 17; |
| } |
| |
| |
| } |