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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.template.builder;
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19
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20 import java.lang.reflect.Constructor;
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21 import java.lang.reflect.InvocationTargetException;
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22
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23 import org.msgpack.*;
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24 import org.msgpack.template.*;
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25
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26 import javassist.CannotCompileException;
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27 import javassist.CtClass;
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28 import javassist.CtConstructor;
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29 import javassist.CtNewConstructor;
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30 import javassist.NotFoundException;
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31
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32 @SuppressWarnings("rawtypes")
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33 public class BeansBuildContext extends BuildContext<BeansFieldEntry> {
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34 protected BeansFieldEntry[] entries;
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35
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36 protected Class<?> origClass;
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37
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38 protected String origName;
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39
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40 protected Template<?>[] templates;
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41
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42 public BeansBuildContext(JavassistTemplateBuilder director) {
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43 super(director);
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44 }
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45
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46 public Template buildTemplate(Class<?> targetClass,
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47 BeansFieldEntry[] entries, Template[] templates) {
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48 this.entries = entries;
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49 this.templates = templates;
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50 this.origClass = targetClass;
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51 this.origName = origClass.getName();
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52 return build(origName);
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53 }
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54
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55 protected void setSuperClass() throws CannotCompileException, NotFoundException {
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56 tmplCtClass.setSuperclass(director.getCtClass(
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57 JavassistTemplateBuilder.JavassistTemplate.class.getName()));
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58 }
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59
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60 protected void buildConstructor() throws CannotCompileException,
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61 NotFoundException {
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62 // Constructor(Class targetClass, Template[] templates)
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63 CtConstructor newCtCons = CtNewConstructor.make(
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64 new CtClass[] {
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65 director.getCtClass(Class.class.getName()),
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66 director.getCtClass(Template.class.getName() + "[]")
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67 }, new CtClass[0], tmplCtClass);
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68 tmplCtClass.addConstructor(newCtCons);
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69 }
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70
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71 protected Template buildInstance(Class<?> c) throws NoSuchMethodException,
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72 InstantiationException, IllegalAccessException, InvocationTargetException {
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73 Constructor<?> cons = c.getConstructor(new Class[] { Class.class, Template[].class });
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74 Object tmpl = cons.newInstance(new Object[] { origClass, templates });
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75 return (Template) tmpl;
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76 }
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77
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78 protected void buildMethodInit() {
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79 }
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80
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81 @Override
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82 protected String buildWriteMethodBody() {
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83 resetStringBuilder();
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84 buildString("{");
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85
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86 buildString("if($2 == null) {");
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87 buildString(" if($3) {");
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88 buildString(" throw new %s(\"Attempted to write null\");", MessageTypeException.class.getName());
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89 buildString(" }");
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90 buildString(" $1.writeNil();");
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91 buildString(" return;");
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92 buildString("}");
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93
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94 buildString("%s _$$_t = (%s)$2;", origName, origName);
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95 buildString("$1.writeArrayBegin(%d);", entries.length);
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96
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97 for (int i = 0; i < entries.length; i++) {
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98 BeansFieldEntry e = entries[i];
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99 if (!e.isAvailable()) {
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100 buildString("$1.writeNil();");
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101 continue;
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102 }
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103 Class<?> type = e.getType();
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104 if (type.isPrimitive()) {
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105 buildString("$1.%s(_$$_t.%s());", primitiveWriteName(type), e.getGetterName());
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106 } else {
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107 buildString("if(_$$_t.%s() == null) {", e.getGetterName());
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108 if (e.isNotNullable()) {
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109 buildString("throw new %s();", MessageTypeException.class.getName());
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110 } else {
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111 buildString("$1.writeNil();");
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112 }
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113 buildString("} else {");
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114 buildString(" this.templates[%d].write($1, _$$_t.%s());", i, e.getGetterName());
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115 buildString("}");
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116 }
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117 }
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118
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119 buildString("$1.writeArrayEnd();");
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120 buildString("}");
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121 return getBuiltString();
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122 }
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123
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124 @Override
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125 protected String buildReadMethodBody() {
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126 resetStringBuilder();
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127 buildString("{ ");
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128
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129 buildString("if(!$3 && $1.trySkipNil()) {");
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130 buildString(" return null;");
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131 buildString("}");
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132
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133 buildString("%s _$$_t;", origName);
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134 buildString("if($2 == null) {");
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135 buildString(" _$$_t = new %s();", origName);
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136 buildString("} else {");
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137 buildString(" _$$_t = (%s)$2;", origName);
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138 buildString("}");
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139
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140 buildString("$1.readArrayBegin();");
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141
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142 for (int i = 0; i < entries.length; i++) {
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143 BeansFieldEntry e = entries[i];
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144
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145 if (!e.isAvailable()) {
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146 buildString("$1.skip();"); // TODO #MN
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147 continue;
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148 }
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149
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150 if (e.isOptional()) {
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151 buildString("if($1.trySkipNil()) {");
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152 buildString("_$$_t.%s(null);", e.getSetterName());
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153 buildString("} else {");
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154 }
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155
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156 Class<?> type = e.getType();
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157 if (type.isPrimitive()) {
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158 buildString("_$$_t.%s( $1.%s() );", e.getSetterName(), primitiveReadName(type));
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159 } else {
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160 buildString(
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161 "_$$_t.%s( (%s)this.templates[%d].read($1, _$$_t.%s()) );",
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162 e.getSetterName(), e.getJavaTypeName(), i, e.getGetterName());
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163 }
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164
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165 if (e.isOptional()) {
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166 buildString("}");
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167 }
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168 }
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169
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170 buildString("$1.readArrayEnd();");
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171 buildString("return _$$_t;");
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172
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173 buildString("}");
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174
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175 return getBuiltString();
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176 }
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177
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178 @Override
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179 public void writeTemplate(Class<?> targetClass, BeansFieldEntry[] entries,
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180 Template[] templates, String directoryName) {
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181 throw new UnsupportedOperationException(targetClass.getName());
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182 }
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183
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184 @Override
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185 public Template loadTemplate(Class<?> targetClass,
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186 BeansFieldEntry[] entries, Template[] templates) {
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187 return null;
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188 }
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189 }
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