001/**
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *     http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018
019package org.apache.hadoop.record.compiler;
020
021import java.util.Map;
022
023import org.apache.hadoop.classification.InterfaceAudience;
024import org.apache.hadoop.classification.InterfaceStability;
025
026
027/**
028 * @deprecated Replaced by <a href="https://hadoop.apache.org/avro/">Avro</a>.
029 */
030@Deprecated
031@InterfaceAudience.Public
032@InterfaceStability.Stable
033public class JMap extends JCompType {
034  
035  static private int level = 0;
036  
037  static private String getLevel() { return Integer.toString(level); }
038  
039  static private void incrLevel() { level++; }
040  
041  static private void decrLevel() { level--; }
042  
043  static private String getId(String id) { return id+getLevel(); }
044  
045  private JType keyType;
046  private JType valueType;
047  
048  class JavaMap extends JavaCompType {
049    
050    JType.JavaType key;
051    JType.JavaType value;
052    
053    JavaMap(JType.JavaType key, JType.JavaType value) {
054      super("java.util.TreeMap<"+key.getWrapperType()+","+value.getWrapperType()+">",
055            "Map",
056            "java.util.TreeMap<"+key.getWrapperType()+","+value.getWrapperType()+">",
057            "TypeID.RIOType.MAP");
058      this.key = key;
059      this.value = value;
060    }
061    
062    String getTypeIDObjectString() {
063      return "new org.apache.hadoop.record.meta.MapTypeID(" + 
064        key.getTypeIDObjectString() + ", " + 
065        value.getTypeIDObjectString() + ")";
066    }
067
068    void genSetRTIFilter(CodeBuffer cb, Map<String, Integer> nestedStructMap) {
069      key.genSetRTIFilter(cb, nestedStructMap);
070      value.genSetRTIFilter(cb, nestedStructMap);
071    }
072
073    void genCompareTo(CodeBuffer cb, String fname, String other) {
074      String setType = "java.util.Set<"+key.getWrapperType()+"> ";
075      String iterType = "java.util.Iterator<"+key.getWrapperType()+"> ";
076      cb.append("{\n");
077      cb.append(setType+getId(Consts.RIO_PREFIX + "set1")+" = "+
078          fname+".keySet();\n");
079      cb.append(setType+getId(Consts.RIO_PREFIX + "set2")+" = "+
080          other+".keySet();\n");
081      cb.append(iterType+getId(Consts.RIO_PREFIX + "miter1")+" = "+
082                getId(Consts.RIO_PREFIX + "set1")+".iterator();\n");
083      cb.append(iterType+getId(Consts.RIO_PREFIX + "miter2")+" = "+
084                getId(Consts.RIO_PREFIX + "set2")+".iterator();\n");
085      cb.append("for(; "+getId(Consts.RIO_PREFIX + "miter1")+".hasNext() && "+
086                getId(Consts.RIO_PREFIX + "miter2")+".hasNext();) {\n");
087      cb.append(key.getType()+" "+getId(Consts.RIO_PREFIX + "k1")+
088                " = "+getId(Consts.RIO_PREFIX + "miter1")+".next();\n");
089      cb.append(key.getType()+" "+getId(Consts.RIO_PREFIX + "k2")+
090                " = "+getId(Consts.RIO_PREFIX + "miter2")+".next();\n");
091      key.genCompareTo(cb, getId(Consts.RIO_PREFIX + "k1"), 
092          getId(Consts.RIO_PREFIX + "k2"));
093      cb.append("if (" + Consts.RIO_PREFIX + "ret != 0) { return " + 
094          Consts.RIO_PREFIX + "ret; }\n");
095      cb.append("}\n");
096      cb.append(Consts.RIO_PREFIX + "ret = ("+getId(Consts.RIO_PREFIX + "set1")+
097          ".size() - "+getId(Consts.RIO_PREFIX + "set2")+".size());\n");
098      cb.append("}\n");
099    }
100    
101    void genReadMethod(CodeBuffer cb, String fname, String tag, boolean decl) {
102      if (decl) {
103        cb.append(getType()+" "+fname+";\n");
104      }
105      cb.append("{\n");
106      incrLevel();
107      cb.append("org.apache.hadoop.record.Index " + 
108          getId(Consts.RIO_PREFIX + "midx")+" = " + 
109          Consts.RECORD_INPUT + ".startMap(\""+tag+"\");\n");
110      cb.append(fname+"=new "+getType()+"();\n");
111      cb.append("for (; !"+getId(Consts.RIO_PREFIX + "midx")+".done(); "+
112          getId(Consts.RIO_PREFIX + "midx")+".incr()) {\n");
113      key.genReadMethod(cb, getId(Consts.RIO_PREFIX + "k"),
114          getId(Consts.RIO_PREFIX + "k"), true);
115      value.genReadMethod(cb, getId(Consts.RIO_PREFIX + "v"), 
116          getId(Consts.RIO_PREFIX + "v"), true);
117      cb.append(fname+".put("+getId(Consts.RIO_PREFIX + "k")+","+
118          getId(Consts.RIO_PREFIX + "v")+");\n");
119      cb.append("}\n");
120      cb.append(Consts.RECORD_INPUT + ".endMap(\""+tag+"\");\n");
121      decrLevel();
122      cb.append("}\n");
123    }
124    
125    void genWriteMethod(CodeBuffer cb, String fname, String tag) {
126      String setType = "java.util.Set<java.util.Map.Entry<"+
127        key.getWrapperType()+","+value.getWrapperType()+">> ";
128      String entryType = "java.util.Map.Entry<"+
129        key.getWrapperType()+","+value.getWrapperType()+"> ";
130      String iterType = "java.util.Iterator<java.util.Map.Entry<"+
131        key.getWrapperType()+","+value.getWrapperType()+">> ";
132      cb.append("{\n");
133      incrLevel();
134      cb.append(Consts.RECORD_OUTPUT + ".startMap("+fname+",\""+tag+"\");\n");
135      cb.append(setType+getId(Consts.RIO_PREFIX + "es")+" = "+
136          fname+".entrySet();\n");
137      cb.append("for("+iterType+getId(Consts.RIO_PREFIX + "midx")+" = "+
138          getId(Consts.RIO_PREFIX + "es")+".iterator(); "+
139          getId(Consts.RIO_PREFIX + "midx")+".hasNext();) {\n");
140      cb.append(entryType+getId(Consts.RIO_PREFIX + "me")+" = "+
141          getId(Consts.RIO_PREFIX + "midx")+".next();\n");
142      cb.append(key.getType()+" "+getId(Consts.RIO_PREFIX + "k")+" = "+
143          getId(Consts.RIO_PREFIX + "me")+".getKey();\n");
144      cb.append(value.getType()+" "+getId(Consts.RIO_PREFIX + "v")+" = "+
145          getId(Consts.RIO_PREFIX + "me")+".getValue();\n");
146      key.genWriteMethod(cb, getId(Consts.RIO_PREFIX + "k"), 
147          getId(Consts.RIO_PREFIX + "k"));
148      value.genWriteMethod(cb, getId(Consts.RIO_PREFIX + "v"), 
149          getId(Consts.RIO_PREFIX + "v"));
150      cb.append("}\n");
151      cb.append(Consts.RECORD_OUTPUT + ".endMap("+fname+",\""+tag+"\");\n");
152      cb.append("}\n");
153      decrLevel();
154    }
155    
156    void genSlurpBytes(CodeBuffer cb, String b, String s, String l) {
157      cb.append("{\n");
158      incrLevel();
159      cb.append("int "+getId("mi")+
160                " = org.apache.hadoop.record.Utils.readVInt("+b+", "+s+");\n");
161      cb.append("int "+getId("mz")+
162                " = org.apache.hadoop.record.Utils.getVIntSize("+getId("mi")+");\n");
163      cb.append(s+"+="+getId("mz")+"; "+l+"-="+getId("mz")+";\n");
164      cb.append("for (int "+getId("midx")+" = 0; "+getId("midx")+
165                " < "+getId("mi")+"; "+getId("midx")+"++) {");
166      key.genSlurpBytes(cb, b, s, l);
167      value.genSlurpBytes(cb, b, s, l);
168      cb.append("}\n");
169      decrLevel();
170      cb.append("}\n");
171    }
172    
173    void genCompareBytes(CodeBuffer cb) {
174      cb.append("{\n");
175      incrLevel();
176      cb.append("int "+getId("mi1")+
177                " = org.apache.hadoop.record.Utils.readVInt(b1, s1);\n");
178      cb.append("int "+getId("mi2")+
179                " = org.apache.hadoop.record.Utils.readVInt(b2, s2);\n");
180      cb.append("int "+getId("mz1")+
181                " = org.apache.hadoop.record.Utils.getVIntSize("+getId("mi1")+");\n");
182      cb.append("int "+getId("mz2")+
183                " = org.apache.hadoop.record.Utils.getVIntSize("+getId("mi2")+");\n");
184      cb.append("s1+="+getId("mz1")+"; s2+="+getId("mz2")+
185                "; l1-="+getId("mz1")+"; l2-="+getId("mz2")+";\n");
186      cb.append("for (int "+getId("midx")+" = 0; "+getId("midx")+
187                " < "+getId("mi1")+" && "+getId("midx")+" < "+getId("mi2")+
188                "; "+getId("midx")+"++) {");
189      key.genCompareBytes(cb);
190      value.genSlurpBytes(cb, "b1", "s1", "l1");
191      value.genSlurpBytes(cb, "b2", "s2", "l2");
192      cb.append("}\n");
193      cb.append("if ("+getId("mi1")+" != "+getId("mi2")+
194                ") { return ("+getId("mi1")+"<"+getId("mi2")+")?-1:0; }\n");
195      decrLevel();
196      cb.append("}\n");
197    }
198  }
199  
200  class CppMap extends CppCompType {
201    
202    JType.CppType key;
203    JType.CppType value;
204    
205    CppMap(JType.CppType key, JType.CppType value) {
206      super("::std::map< "+key.getType()+", "+ value.getType()+" >");
207      this.key = key;
208      this.value = value;
209    }
210    
211    String getTypeIDObjectString() {
212      return "new ::hadoop::MapTypeID(" + 
213        key.getTypeIDObjectString() + ", " + 
214        value.getTypeIDObjectString() + ")";
215    }
216
217    void genSetRTIFilter(CodeBuffer cb) {
218      key.genSetRTIFilter(cb);
219      value.genSetRTIFilter(cb);
220    }
221
222  }
223  
224  /** Creates a new instance of JMap */
225  public JMap(JType t1, JType t2) {
226    setJavaType(new JavaMap(t1.getJavaType(), t2.getJavaType()));
227    setCppType(new CppMap(t1.getCppType(), t2.getCppType()));
228    setCType(new CType());
229    keyType = t1;
230    valueType = t2;
231  }
232  
233  String getSignature() {
234    return "{" + keyType.getSignature() + valueType.getSignature() +"}";
235  }
236}