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    
019    package org.apache.hadoop.record.compiler;
020    
021    import org.apache.hadoop.classification.InterfaceAudience;
022    import org.apache.hadoop.classification.InterfaceStability;
023    
024    /**
025     * @deprecated Replaced by <a href="http://hadoop.apache.org/avro/">Avro</a>.
026     */
027    @Deprecated
028    @InterfaceAudience.Public
029    @InterfaceStability.Stable
030    public class JFloat extends JType {
031      
032      class JavaFloat extends JavaType {
033        
034        JavaFloat() {
035          super("float", "Float", "Float", "TypeID.RIOType.FLOAT");
036        }
037        
038        String getTypeIDObjectString() {
039          return "org.apache.hadoop.record.meta.TypeID.FloatTypeID";
040        }
041    
042        void genHashCode(CodeBuffer cb, String fname) {
043          cb.append(Consts.RIO_PREFIX + "ret = Float.floatToIntBits("+fname+");\n");
044        }
045        
046        void genSlurpBytes(CodeBuffer cb, String b, String s, String l) {
047          cb.append("{\n");
048          cb.append("if ("+l+"<4) {\n");
049          cb.append("throw new java.io.IOException(\"Float is exactly 4 bytes."+
050                    " Provided buffer is smaller.\");\n");
051          cb.append("}\n");
052          cb.append(s+"+=4; "+l+"-=4;\n");
053          cb.append("}\n");
054        }
055        
056        void genCompareBytes(CodeBuffer cb) {
057          cb.append("{\n");
058          cb.append("if (l1<4 || l2<4) {\n");
059          cb.append("throw new java.io.IOException(\"Float is exactly 4 bytes."+
060                    " Provided buffer is smaller.\");\n");
061          cb.append("}\n");
062          cb.append("float f1 = org.apache.hadoop.record.Utils.readFloat(b1, s1);\n");
063          cb.append("float f2 = org.apache.hadoop.record.Utils.readFloat(b2, s2);\n");
064          cb.append("if (f1 != f2) {\n");
065          cb.append("return ((f1-f2) < 0) ? -1 : 0;\n");
066          cb.append("}\n");
067          cb.append("s1+=4; s2+=4; l1-=4; l2-=4;\n");
068          cb.append("}\n");
069        }
070      }
071    
072      class CppFloat extends CppType {
073        
074        CppFloat() {
075          super("float");
076        }
077        
078        String getTypeIDObjectString() {
079          return "new ::hadoop::TypeID(::hadoop::RIOTYPE_FLOAT)";
080        }
081      }
082    
083      /** Creates a new instance of JFloat */
084      public JFloat() {
085        setJavaType(new JavaFloat());
086        setCppType(new CppFloat());
087        setCType(new CType());
088      }
089      
090      String getSignature() {
091        return "f";
092      }
093    }