Adding JMCR-Stable version

[Benchmarks_CSolver.git] / JMCR-Stable / real-world application / MyDerby-10.3 / java / engine / org / apache / derby / iapi / services / context / ErrorStringBuilder.java

diff --git a/JMCR-Stable/real-world application/MyDerby-10.3/java/engine/org/apache/derby/iapi/services/context/ErrorStringBuilder.java b/JMCR-Stable/real-world application/MyDerby-10.3/java/engine/org/apache/derby/iapi/services/context/ErrorStringBuilder.java
new file mode 100644 (file)
index 0000000..7bd4b66
--- /dev/null
+++ b/JMCR-Stable/real-world application/MyDerby-10.3/java/engine/org/apache/derby/iapi/services/context/ErrorStringBuilder.java
@@ -0,0 +1,127 @@
+/*\r
+\r
+   Derby - Class org.apache.derby.iapi.services.context.ErrorStringBuilder\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.context;\r
+\r
+import org.apache.derby.iapi.services.stream.PrintWriterGetHeader;\r
+\r
+import java.io.StringWriter;\r
+import java.io.PrintWriter;\r
+\r
+/**\r
+ * Class used to form error messages.  Primary\r
+ * reason for existence is to allow a way to call\r
+ * printStackTrace() w/o automatically writting\r
+ * to a stream.\r
+ */\r
+public class ErrorStringBuilder \r
+{\r
+       private StringWriter    stringWriter;\r
+       private PrintWriter             printWriter;\r
+       private PrintWriterGetHeader    headerGetter;\r
+\r
+       /**\r
+       ** Construct an error string builder\r
+       */\r
+       public ErrorStringBuilder(PrintWriterGetHeader headerGetter)\r
+       {\r
+               this.headerGetter = headerGetter;\r
+               this.stringWriter = new StringWriter();\r
+               this.printWriter = new PrintWriter(stringWriter);\r
+       }\r
+\r
+       /**\r
+       ** Append an error string \r
+       **\r
+       ** @param s     the string to append\r
+       */\r
+       public void append(String s)\r
+       {\r
+               if (headerGetter != null)\r
+                       printWriter.print(headerGetter.getHeader());\r
+               printWriter.print(s);\r
+       }\r
+\r
+\r
+       /**\r
+       ** Append an error string with a newline\r
+       **\r
+       ** @param s     the string to append\r
+       */\r
+       public void appendln(String s)\r
+       {\r
+               if (headerGetter != null)\r
+                       printWriter.print(headerGetter.getHeader());\r
+               printWriter.println(s);\r
+       }\r
+\r
+       /**\r
+       ** Print a stacktrace from the throwable in the error\r
+       ** buffer.\r
+       **\r
+       ** @param t     the error\r
+       */\r
+       public void stackTrace(Throwable t)\r
+       {\r
+               int level = 0;\r
+               while(t != null)\r
+               {\r
+                       if (level > 0)  \r
+                               printWriter.println("============= begin nested exception, level (" +\r
+                                                                       level + ") ===========");\r
+\r
+                       t.printStackTrace(printWriter);\r
+\r
+                       if (t instanceof java.sql.SQLException) {\r
+                               Throwable next = ((java.sql.SQLException)t).getNextException();\r
+                               t = (next == null) ? t.getCause() : next;\r
+                       } else {\r
+                               t = t.getCause();\r
+                       }\r
+\r
+                       if (level > 0)  \r
+                               printWriter.println("============= end nested exception, level (" + \r
+                                                                       level + ") ===========");\r
+\r
+                       level++;\r
+\r
+               }\r
+\r
+       }\r
+\r
+       /**\r
+       ** Reset the buffer -- truncate it down to nothing.\r
+       **\r
+       */\r
+       public void reset()\r
+       {\r
+               // Is this the most effecient way to do this?\r
+               stringWriter.getBuffer().setLength(0);\r
+       }\r
+\r
+       /**\r
+       ** Get the buffer\r
+       */\r
+       public StringBuffer get()\r
+       {\r
+               return stringWriter.getBuffer();\r
+       }       \r
+}      \r