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1 //
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2 // MessagePack for Java
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3 //
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4 // Copyright (C) 2009 - 2013 FURUHASHI Sadayuki
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5 //
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6 // Licensed under the Apache License, Version 2.0 (the "License");
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7 // you may not use this file except in compliance with the License.
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8 // You may obtain a copy of the License at
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9 //
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10 // http://www.apache.org/licenses/LICENSE-2.0
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11 //
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12 // Unless required by applicable law or agreed to in writing, software
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13 // distributed under the License is distributed on an "AS IS" BASIS,
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14 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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15 // See the License for the specific language governing permissions and
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16 // limitations under the License.
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17 //
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18 package org.msgpack.unpacker;
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19
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20 import java.io.IOException;
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21 import java.nio.ByteBuffer;
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22 import org.msgpack.type.Value;
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23 import org.msgpack.MessagePack;
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24 import org.msgpack.template.Template;
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25 import org.msgpack.packer.Unconverter;
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26
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27 public abstract class AbstractUnpacker implements Unpacker {
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28 protected MessagePack msgpack;
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29
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30 protected int rawSizeLimit = 134217728;
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31
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32 protected int arraySizeLimit = 4194304;
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33
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34 protected int mapSizeLimit = 2097152;
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35
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36 protected AbstractUnpacker(MessagePack msgpack) {
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37 this.msgpack = msgpack;
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38 }
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39
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40 @Override
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41 public ByteBuffer readByteBuffer() throws IOException {
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42 return ByteBuffer.wrap(readByteArray());
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43 }
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44
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45 @Override
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46 public void readArrayEnd() throws IOException {
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47 readArrayEnd(false);
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48 }
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49
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50 @Override
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51 public void readMapEnd() throws IOException {
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52 readMapEnd(false);
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53 }
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54
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55 @Override
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56 public UnpackerIterator iterator() {
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57 return new UnpackerIterator(this);
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58 }
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59
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60 protected abstract void readValue(Unconverter uc) throws IOException;
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61
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62 @Override
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63 public Value readValue() throws IOException {
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64 Unconverter uc = new Unconverter(msgpack);
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65 readValue(uc);
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66 return uc.getResult();
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67 }
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68
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69 protected abstract boolean tryReadNil() throws IOException;
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70
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71 @Override
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72 public <T> T read(Class<T> klass) throws IOException {
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73 if (tryReadNil()) {
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74 return null;
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75 }
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76 Template<T> tmpl = msgpack.lookup(klass);
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77 return tmpl.read(this, null);
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78 }
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79
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80 @SuppressWarnings("unchecked")
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81 @Override
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82 public <T> T read(T to) throws IOException {
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83 if (tryReadNil()) {
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84 return null;
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85 }
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86 Template<T> tmpl = msgpack.lookup((Class<T>) to.getClass());
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87 return tmpl.read(this, to);
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88 }
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89
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90 @Override
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91 public <T> T read(Template<T> tmpl) throws IOException {
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92 if (tryReadNil()) {
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93 return null;
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94 }
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95 return (T) tmpl.read(this, null);
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96 }
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97
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98 @Override
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99 public <T> T read(T to, Template<T> tmpl) throws IOException {
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100 if (tryReadNil()) {
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101 return null;
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102 }
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103 return (T) tmpl.read(this, to);
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104 }
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105
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106 public int getReadByteCount() {
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107 throw new UnsupportedOperationException("Not implemented");
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108 }
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109
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110 public void resetReadByteCount() {
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111 throw new UnsupportedOperationException("Not implemented");
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112 }
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113
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114 public void setRawSizeLimit(int size) {
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115 if (size < 32) {
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116 rawSizeLimit = 32;
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117 } else {
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118 rawSizeLimit = size;
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119 }
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120 }
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121
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122 public void setArraySizeLimit(int size) {
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123 if (size < 16) {
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124 arraySizeLimit = 16;
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125 } else {
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126 arraySizeLimit = size;
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127 }
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128 }
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129
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130 public void setMapSizeLimit(int size) {
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131 if (size < 16) {
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132 mapSizeLimit = 16;
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133 } else {
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134 mapSizeLimit = size;
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135 }
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136 }
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137 }
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