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 /**
026 * @deprecated Replaced by <a href="http://hadoop.apache.org/avro/">Avro</a>.
027 */
028 @Deprecated
029 @InterfaceAudience.Public
030 @InterfaceStability.Stable
031 public class JDouble extends JType {
032
033 class JavaDouble extends JavaType {
034
035 JavaDouble() {
036 super("double", "Double", "Double", "TypeID.RIOType.DOUBLE");
037 }
038
039 String getTypeIDObjectString() {
040 return "org.apache.hadoop.record.meta.TypeID.DoubleTypeID";
041 }
042
043 void genHashCode(CodeBuffer cb, String fname) {
044 String tmp = "Double.doubleToLongBits("+fname+")";
045 cb.append(Consts.RIO_PREFIX + "ret = (int)("+tmp+"^("+tmp+">>>32));\n");
046 }
047
048 void genSlurpBytes(CodeBuffer cb, String b, String s, String l) {
049 cb.append("{\n");
050 cb.append("if ("+l+"<8) {\n");
051 cb.append("throw new java.io.IOException(\"Double is exactly 8 bytes."+
052 " Provided buffer is smaller.\");\n");
053 cb.append("}\n");
054 cb.append(s+"+=8; "+l+"-=8;\n");
055 cb.append("}\n");
056 }
057
058 void genCompareBytes(CodeBuffer cb) {
059 cb.append("{\n");
060 cb.append("if (l1<8 || l2<8) {\n");
061 cb.append("throw new java.io.IOException(\"Double is exactly 8 bytes."+
062 " Provided buffer is smaller.\");\n");
063 cb.append("}\n");
064 cb.append("double d1 = org.apache.hadoop.record.Utils.readDouble(b1, s1);\n");
065 cb.append("double d2 = org.apache.hadoop.record.Utils.readDouble(b2, s2);\n");
066 cb.append("if (d1 != d2) {\n");
067 cb.append("return ((d1-d2) < 0) ? -1 : 0;\n");
068 cb.append("}\n");
069 cb.append("s1+=8; s2+=8; l1-=8; l2-=8;\n");
070 cb.append("}\n");
071 }
072 }
073
074 class CppDouble extends CppType {
075
076 CppDouble() {
077 super("double");
078 }
079
080 String getTypeIDObjectString() {
081 return "new ::hadoop::TypeID(::hadoop::RIOTYPE_DOUBLE)";
082 }
083 }
084
085
086 /** Creates a new instance of JDouble */
087 public JDouble() {
088 setJavaType(new JavaDouble());
089 setCppType(new CppDouble());
090 setCType(new CType());
091 }
092
093 String getSignature() {
094 return "d";
095 }
096 }