1 /**
2  * Licensed to the Apache Software Foundation (ASF) under one
3  * or more contributor license agreements.  See the NOTICE file
4  * distributed with this work for additional information
5  * regarding copyright ownership.  The ASF licenses this file
6  * to you under the Apache License, Version 2.0 (the
7  * "License"); you may not use this file except in compliance
8  * with the License.  You may obtain a copy of the License at
9  *
10  *     http://www.apache.org/licenses/LICENSE-2.0
11  *
12  * Unless required by applicable law or agreed to in writing, software
13  * distributed under the License is distributed on an "AS IS" BASIS,
14  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15  * See the License for the specific language governing permissions and
16  * limitations under the License.
17  */
18 
19 package org.apache.hadoop.record.compiler;
20 
21 import org.apache.hadoop.classification.InterfaceAudience;
22 import org.apache.hadoop.classification.InterfaceStability;
23 
24 /**
25  * @deprecated Replaced by <a href="http://hadoop.apache.org/avro/">Avro</a>.
26  */
27 @Deprecated
28 @InterfaceAudience.Public
29 @InterfaceStability.Stable
30 public class JFloat extends JType {
31 
32   class JavaFloat extends JavaType {
33 
JavaFloat()34     JavaFloat() {
35       super("float", "Float", "Float", "TypeID.RIOType.FLOAT");
36     }
37 
38     @Override
getTypeIDObjectString()39     String getTypeIDObjectString() {
40       return "org.apache.hadoop.record.meta.TypeID.FloatTypeID";
41     }
42 
43     @Override
genHashCode(CodeBuffer cb, String fname)44     void genHashCode(CodeBuffer cb, String fname) {
45       cb.append(Consts.RIO_PREFIX + "ret = Float.floatToIntBits("+fname+");\n");
46     }
47 
48     @Override
genSlurpBytes(CodeBuffer cb, String b, String s, String l)49     void genSlurpBytes(CodeBuffer cb, String b, String s, String l) {
50       cb.append("{\n");
51       cb.append("if ("+l+"<4) {\n");
52       cb.append("throw new java.io.IOException(\"Float is exactly 4 bytes."+
53                 " Provided buffer is smaller.\");\n");
54       cb.append("}\n");
55       cb.append(s+"+=4; "+l+"-=4;\n");
56       cb.append("}\n");
57     }
58 
59     @Override
genCompareBytes(CodeBuffer cb)60     void genCompareBytes(CodeBuffer cb) {
61       cb.append("{\n");
62       cb.append("if (l1<4 || l2<4) {\n");
63       cb.append("throw new java.io.IOException(\"Float is exactly 4 bytes."+
64                 " Provided buffer is smaller.\");\n");
65       cb.append("}\n");
66       cb.append("float f1 = org.apache.hadoop.record.Utils.readFloat(b1, s1);\n");
67       cb.append("float f2 = org.apache.hadoop.record.Utils.readFloat(b2, s2);\n");
68       cb.append("if (f1 != f2) {\n");
69       cb.append("return ((f1-f2) < 0) ? -1 : 0;\n");
70       cb.append("}\n");
71       cb.append("s1+=4; s2+=4; l1-=4; l2-=4;\n");
72       cb.append("}\n");
73     }
74   }
75 
76   class CppFloat extends CppType {
77 
CppFloat()78     CppFloat() {
79       super("float");
80     }
81 
82     @Override
getTypeIDObjectString()83     String getTypeIDObjectString() {
84       return "new ::hadoop::TypeID(::hadoop::RIOTYPE_FLOAT)";
85     }
86   }
87 
88   /** Creates a new instance of JFloat */
JFloat()89   public JFloat() {
90     setJavaType(new JavaFloat());
91     setCppType(new CppFloat());
92     setCType(new CType());
93   }
94 
95   @Override
getSignature()96   String getSignature() {
97     return "f";
98   }
99 }
100