Mercurial Hosting > luan
annotate core/src/luan/modules/RpcLuan.java @ 754:1a101ac9ea46
add lucene restore
author | Franklin Schmidt <fschmidt@gmail.com> |
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date | Sun, 17 Jul 2016 19:21:52 -0600 |
parents | 4b8695f1cfc4 |
children | c29d11d675fd |
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1 package luan.modules; |
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2 |
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3 import java.io.InputStream; |
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4 import java.io.OutputStream; |
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5 import java.io.BufferedInputStream; |
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6 import java.io.BufferedOutputStream; |
744 | 7 import java.io.InputStreamReader; |
754 | 8 import java.io.FilterInputStream; |
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9 import java.io.IOException; |
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10 import java.io.EOFException; |
744 | 11 import java.net.Socket; |
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12 import java.nio.charset.StandardCharsets; |
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13 import java.util.Set; |
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14 import java.util.IdentityHashMap; |
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15 import java.util.Collections; |
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16 import java.util.Map; |
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17 import luan.Luan; |
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18 import luan.LuanState; |
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19 import luan.LuanTable; |
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20 import luan.LuanFunction; |
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21 import luan.LuanException; |
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22 import luan.LuanMethod; |
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23 |
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24 |
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25 public final class RpcLuan { |
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26 private static final int NIL = 0; |
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27 private static final int STRING = 1; |
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28 private static final int BOOLEAN = 2; |
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29 private static final int NUMBER = 3; |
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30 private static final int BINARY = 4; |
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31 private static final int TABLE = 5; |
744 | 32 private static final int IO = 6; |
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33 |
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34 @LuanMethod public static Object[] call(LuanState luan,LuanTable socketTbl,String fnName,Object... args) |
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35 throws LuanException, IOException |
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36 { |
744 | 37 IoLuan.LuanSocket luanSocket = (IoLuan.LuanSocket)socketTbl.rawGet("java"); |
38 Socket socket = luanSocket.socket; | |
39 InputStream in = new BufferedInputStream(socket.getInputStream()); | |
40 OutputStream out = new BufferedOutputStream(socket.getOutputStream()); | |
41 Close close = new Close(); | |
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42 try { |
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43 writeString(out,fnName); |
744 | 44 writeObjs(out,luan,args); |
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45 out.flush(); |
744 | 46 socket.shutdownOutput(); |
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47 boolean ok = readBoolean(in); |
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48 if( ok ) { |
744 | 49 return readObjs(in,luan,close); |
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50 } else { |
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51 String msg = readString(in); |
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52 throw new LuanException(msg); |
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53 } |
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54 } finally { |
744 | 55 if( close.b) { |
56 socket.close(); | |
57 } | |
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58 } |
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59 } |
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60 |
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61 public static void respond(LuanState luan,LuanTable socketTbl,LuanTable fns) |
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62 throws IOException, LuanException |
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63 { |
744 | 64 IoLuan.LuanSocket luanSocket = (IoLuan.LuanSocket)socketTbl.rawGet("java"); |
65 Socket socket = luanSocket.socket; | |
66 InputStream in = new BufferedInputStream(socket.getInputStream()); | |
67 OutputStream out = new BufferedOutputStream(socket.getOutputStream()); | |
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68 try { |
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69 Object[] rtn; |
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70 try { |
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71 String fnName = readString(in); |
744 | 72 Object[] args = readObjs(in,luan,null); |
742 | 73 LuanFunction fn = (LuanFunction)fns.get(luan,fnName); |
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74 if( fn == null ) |
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75 throw new LuanException( "function not found: " + fnName ); |
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76 rtn = Luan.array(fn.call(luan,args)); |
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77 } catch(LuanException e) { |
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78 writeBoolean(out,false); |
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79 writeString(out,e.getFullMessage()); |
754 | 80 out.flush(); |
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81 return; |
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82 } |
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83 writeBoolean(out,true); |
744 | 84 writeObjs(out,luan,rtn); |
754 | 85 out.flush(); |
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86 } finally { |
744 | 87 socket.close(); |
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88 } |
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89 } |
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90 |
744 | 91 private static void writeObjs(OutputStream out,LuanState luan,Object[] a) throws IOException, LuanException { |
92 IoLuan.LuanIn luanIn = null; | |
93 writeInt(out,a.length); | |
94 for( Object obj : a ) { | |
95 if( obj instanceof LuanTable ) { | |
96 LuanTable tbl = (LuanTable)obj; | |
97 Object java = tbl.rawGet("java"); | |
98 if( java instanceof IoLuan.LuanIn ) { | |
99 if( luanIn != null ) | |
100 throw new LuanException("can't have multiple IO params"); | |
101 luanIn = (IoLuan.LuanIn)java; | |
102 out.write(IO); | |
103 continue; | |
104 } | |
105 } | |
106 writeObj(out,luan,obj); | |
107 } | |
108 if( luanIn != null ) { | |
109 InputStream in = luanIn.inputStream(); | |
110 Utils.copyAll(in,out); | |
111 } | |
112 } | |
113 | |
114 private static Object[] readObjs(InputStream in,LuanState luan,Close close) throws IOException, LuanException { | |
115 int n = readInt(in); | |
116 Object[] rtn = new Object[n]; | |
117 for( int i=0; i<n; i++ ) { | |
118 rtn[i] = readObj(in,luan,close); | |
119 } | |
120 return rtn; | |
121 } | |
122 | |
123 private static void writeObj(OutputStream out,LuanState luan,Object obj) throws IOException, LuanException { | |
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124 if( obj == null ) { |
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125 out.write(NIL); |
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126 } |
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127 else if( obj instanceof String ) { |
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128 out.write(STRING); |
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129 writeString(out,(String)obj); |
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130 } |
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131 else if( obj instanceof Boolean ) { |
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132 out.write(BOOLEAN); |
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133 writeBoolean(out,(Boolean)obj); |
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134 } |
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135 else if( obj instanceof Number ) { |
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136 out.write(NUMBER); |
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137 writeString(out,obj.toString()); |
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138 } |
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139 else if( obj instanceof byte[] ) { |
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140 byte[] a = (byte[])obj; |
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141 out.write(BINARY); |
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142 writeInt(out,a.length); |
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143 out.write(a); |
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144 } |
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145 else if( obj instanceof LuanTable ) { |
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146 out.write(TABLE); |
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147 String s = pickle( luan, obj, Collections.newSetFromMap(new IdentityHashMap<LuanTable,Boolean>()) ); |
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148 writeString(out,s); |
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149 } |
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150 else |
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151 throw new LuanException( "invalid type: " + obj.getClass() ); |
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152 } |
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153 |
744 | 154 private static Object readObj(InputStream in,LuanState luan,Close close) throws IOException, LuanException { |
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155 int type = in.read(); |
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156 switch(type) { |
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157 case NIL: |
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158 return null; |
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159 case STRING: |
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160 return readString(in); |
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161 case BOOLEAN: |
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162 return readBoolean(in); |
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163 case NUMBER: |
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164 return Double.valueOf(readString(in)); |
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165 case BINARY: |
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166 return readBinary(in,readInt(in)); |
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167 case TABLE: |
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168 String s = readString(in); |
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169 LuanFunction fn = Luan.load("return "+s,"rpc-reader"); |
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170 return fn.call(luan); |
744 | 171 case IO: |
172 return new LuanInputStream(in,close).table(); | |
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173 default: |
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174 throw new LuanException( "invalid type: " + type ); |
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175 } |
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176 } |
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177 |
744 | 178 private static Boolean readBoolean(InputStream in) throws IOException { |
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179 return Boolean.valueOf(readString(in)); |
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180 } |
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181 |
744 | 182 private static String readString(InputStream in) throws IOException { |
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183 int len = readInt(in); |
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184 byte[] a = readBinary(in,len); |
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185 return new String(a,StandardCharsets.UTF_8); |
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186 } |
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187 |
744 | 188 private static int readInt(InputStream in) throws IOException { |
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189 int ch1 = in.read(); |
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190 int ch2 = in.read(); |
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191 int ch3 = in.read(); |
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192 int ch4 = in.read(); |
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193 if ((ch1 | ch2 | ch3 | ch4) < 0) |
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194 throw new EOFException(); |
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195 return ((ch1 << 24) + (ch2 << 16) + (ch3 << 8) + (ch4 << 0)); |
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196 } |
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197 |
744 | 198 private static byte[] readBinary(InputStream in,int size) throws IOException { |
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199 byte[] a = new byte[size]; |
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200 int i = 0; |
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201 while( i < size ) { |
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202 int n = in.read(a,i,size-i); |
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203 if( n == -1 ) |
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204 throw new EOFException(); |
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205 i += n; |
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206 } |
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207 return a; |
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208 } |
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209 |
744 | 210 private static void writeBoolean(OutputStream out,Boolean b) throws IOException { |
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211 writeString(out,b.toString()); |
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212 } |
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213 |
744 | 214 private static void writeString(OutputStream out,String s) throws IOException { |
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215 byte[] a = s.getBytes(StandardCharsets.UTF_8); |
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216 writeInt(out,a.length); |
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217 out.write(a); |
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218 } |
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219 |
744 | 220 private static void writeInt(OutputStream out,int v) throws IOException { |
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221 out.write((v >>> 24) & 0xFF); |
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222 out.write((v >>> 16) & 0xFF); |
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223 out.write((v >>> 8) & 0xFF); |
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224 out.write((v >>> 0) & 0xFF); |
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225 } |
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226 |
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227 |
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228 private static String pickle(LuanState luan,Object obj,Set<LuanTable> set) throws LuanException { |
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229 if( obj == null ) |
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230 return "nil"; |
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231 if( obj instanceof Boolean ) |
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232 return obj.toString(); |
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233 if( obj instanceof Number ) |
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234 return Luan.toString((Number)obj); |
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235 if( obj instanceof String ) |
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236 return "\"" + Luan.stringEncode((String)obj) + "\""; |
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237 if( obj instanceof LuanTable ) { |
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238 LuanTable tbl = (LuanTable)obj; |
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239 if( !set.add(tbl) ) { |
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240 throw new LuanException( "circular reference in table" ); |
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241 } |
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242 StringBuilder sb = new StringBuilder(); |
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243 sb.append( "{" ); |
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244 for( Map.Entry<Object,Object> entry : tbl.iterable(luan) ) { |
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245 sb.append( "[" ); |
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246 sb.append( pickle(luan,entry.getKey(),set) ); |
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247 sb.append( "]=" ); |
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248 sb.append( pickle(luan,entry.getValue(),set) ); |
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249 sb.append( ", " ); |
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250 } |
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251 sb.append( "}" ); |
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252 return sb.toString(); |
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253 } |
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254 throw new LuanException( "invalid type: " + obj.getClass() ); |
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255 } |
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256 |
744 | 257 |
258 private static class Close { | |
259 boolean b = true; | |
260 } | |
261 | |
262 private static class LuanInputStream extends IoLuan.LuanIn { | |
263 private final InputStream in; | |
264 private final boolean close; | |
265 | |
266 public LuanInputStream(InputStream in,Close close) { | |
267 this.in = in; | |
268 this.close = close!=null && close.b; | |
269 if(this.close) close.b = false; | |
270 } | |
271 | |
272 @Override public InputStream inputStream() { | |
754 | 273 return new FilterInputStream(in) { |
274 @Override public void close() throws IOException { | |
275 if(close) super.close(); | |
276 } | |
277 }; | |
744 | 278 } |
279 | |
280 @Override public String to_string() { | |
281 return "<input_stream>"; | |
282 } | |
283 | |
284 @Override public String to_uri_string() { | |
285 throw new UnsupportedOperationException(); | |
286 } | |
287 | |
288 @Override public boolean exists() { | |
289 return true; | |
290 } | |
291 }; | |
292 | |
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293 } |