--- /dev/null
+/*\r
+\r
+ Derby - Class org.apache.derby.iapi.services.info.JVMInfo\r
+\r
+ Licensed to the Apache Software Foundation (ASF) under one or more\r
+ contributor license agreements. See the NOTICE file distributed with\r
+ this work for additional information regarding copyright ownership.\r
+ The ASF licenses this file to you under the Apache License, Version 2.0\r
+ (the "License"); you may not use this file except in compliance with\r
+ the License. You may obtain a copy of the License at\r
+\r
+ http://www.apache.org/licenses/LICENSE-2.0\r
+\r
+ Unless required by applicable law or agreed to in writing, software\r
+ distributed under the License is distributed on an "AS IS" BASIS,\r
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\r
+ See the License for the specific language governing permissions and\r
+ limitations under the License.\r
+\r
+ */\r
+\r
+package org.apache.derby.iapi.services.info;\r
+\r
+\r
+/**\r
+ This class is used to determine which Java specification Derby will run at.\r
+ For a useful discussion of how this class is used, please see DERBY-3176.\r
+ */\r
+public abstract class JVMInfo\r
+{\r
+ /**\r
+ The JVM's runtime environment.\r
+ <UL>\r
+ <LI> 1 - not used was JDK 1.1\r
+ <LI> 2 - not used, was for JDK 1.2 and 1.3\r
+ <LI> 4 - J2SE_14 - JDK 1.4.0 or 1.4.1\r
+ <LI> 5 - J2SE_142 - JDK 1.4.2\r
+ <LI> 6 - J2SE_15 - JDK 1.5\r
+ <LI> 7 - J2SE_16 - JDK 1.6\r
+ </UL>\r
+ */\r
+ public static final int JDK_ID;\r
+\r
+ public static final int J2SE_13 = 2;\r
+ public static final int J2SE_14 = 4;\r
+ public static final int J2SE_142 = 5;\r
+ public static final int J2SE_15 = 6; // aka J2SE 5.0\r
+ public static final int J2SE_16 = 7; // Java SE 6, not J2SE\r
+\r
+ public static final boolean J2ME;\r
+\r
+ /**\r
+ JDBC Boolean type - Types.BIT in JDK1.1 & 1.2 & 1.3, Types.BOOLEAN in JDK1.4\r
+ */\r
+ public static final int JAVA_SQL_TYPES_BOOLEAN;\r
+\r
+ static \r
+ {\r
+ int id;\r
+\r
+ //\r
+ // If the property java.specification.version is set, then try to parse\r
+ // that. Anything we don't recognize, default to Java 2 platform\r
+ // because java.specification.version is a property that is introduced\r
+ // in Java 2. We hope that JVM vendors don't implement Java 1 and\r
+ // set a Java 2 system property.\r
+ // \r
+ // Otherwise, see if we recognize what is set in java.version.\r
+ // If we don't recoginze that, or if the property is not set, assume\r
+ // version 1.3.\r
+ //\r
+ String javaVersion;\r
+ String javaSpec;\r
+ boolean isJ2ME;\r
+\r
+ try {\r
+ javaSpec = System.getProperty("java.specification.name");\r
+ } catch (SecurityException se) {\r
+ // some vms do not know about this property so they\r
+ // throw a security exception when access is restricted.\r
+ javaSpec = null;\r
+ }\r
+\r
+ try {\r
+ javaVersion = System.getProperty("java.specification.version", "1.4");\r
+\r
+ } catch (SecurityException se) {\r
+ // some vms do not know about this property so they\r
+ // throw a security exception when access is restricted.\r
+ javaVersion = "1.4";\r
+ }\r
+\r
+ if (javaSpec != null &&\r
+ (\r
+ javaSpec.startsWith("J2ME") || // recognize IBM WCTME\r
+ (\r
+ (javaSpec.indexOf( "Profile" ) > -1) && // recognize phoneME\r
+ (javaSpec.indexOf( "Specification" ) > -1)\r
+ )\r
+ )\r
+ )\r
+ {\r
+ id = J2SE_14;\r
+ isJ2ME = true;\r
+ }\r
+ else\r
+ {\r
+ // J2SE/J2EE\r
+ isJ2ME = false;\r
+\r
+ if (javaVersion.equals("1.4"))\r
+ {\r
+ String vmVersion = System.getProperty("java.version", "1.4.0");\r
+\r
+ if (JVMInfo.vmCheck(vmVersion, "1.4.0") || JVMInfo.vmCheck(vmVersion, "1.4.1"))\r
+ id = J2SE_14;\r
+ else\r
+ id = J2SE_142;\r
+ }\r
+ else if (javaVersion.equals("1.5"))\r
+ {\r
+ id = J2SE_15;\r
+ }\r
+ else if (javaVersion.equals("1.6"))\r
+ {\r
+ id = J2SE_16;\r
+ }\r
+ else\r
+ {\r
+ // aussme our lowest support unless the java spec\r
+ // is greater than our highest level.\r
+ id = J2SE_14;\r
+\r
+ try {\r
+\r
+ if (Float.valueOf(javaVersion).floatValue() > 1.6f)\r
+ id = J2SE_16;\r
+ } catch (NumberFormatException nfe) {\r
+ }\r
+ }\r
+ }\r
+\r
+ JDK_ID = id;\r
+ J2ME = isJ2ME;\r
+ JAVA_SQL_TYPES_BOOLEAN = (isJ2ME || id >= J2SE_14) ?\r
+ org.apache.derby.iapi.reference.JDBC30Translation.SQL_TYPES_BOOLEAN :java.sql.Types.BIT;\r
+ }\r
+\r
+ /**\r
+ Check the vmVersion against a speciifc value.\r
+ Sun jvms are of the form\r
+ */\r
+ private static boolean vmCheck(String vmVersion, String id)\r
+ {\r
+ return vmVersion.equals(id) || vmVersion.startsWith(id + "_");\r
+ }\r
+\r
+ /**\r
+ Return Derby's understanding of the virtual machine's environment.\r
+ */\r
+ public static String derbyVMLevel()\r
+ {\r
+ switch (JDK_ID)\r
+ {\r
+ case J2SE_14: return J2ME ? "J2ME - JDBC for CDC/FP 1.1" : "J2SE 1.4 - JDBC 3.0";\r
+ case J2SE_142: return "J2SE 1.4.2 - JDBC 3.0";\r
+ case J2SE_15: return "J2SE 5.0 - JDBC 3.0";\r
+ case J2SE_16: return "Java SE 6 - JDBC 4.0";\r
+ default: return "?-?";\r
+ }\r
+ }\r
+\r
+}\r
projects / Benchmarks_CSolver.git / blobdiff