Author: schor
Date: Fri Apr 15 14:38:54 2016
New Revision: 1739309
URL: http://svn.apache.org/viewvc?rev=1739309&view=rev
Log:
[UIMA-4897] add elide and callers tracing, and a version of internalError
supporting a nested exception
Modified:
uima/uimaj/branches/experiment-v3-jcas/uimaj-core/src/main/java/org/apache/uima/util/Misc.java
Modified:
uima/uimaj/branches/experiment-v3-jcas/uimaj-core/src/main/java/org/apache/uima/util/Misc.java
URL:
http://svn.apache.org/viewvc/uima/uimaj/branches/experiment-v3-jcas/uimaj-core/src/main/java/org/apache/uima/util/Misc.java?rev=1739309&r1=1739308&r2=1739309&view=diff
==============================================================================
---
uima/uimaj/branches/experiment-v3-jcas/uimaj-core/src/main/java/org/apache/uima/util/Misc.java
(original)
+++
uima/uimaj/branches/experiment-v3-jcas/uimaj-core/src/main/java/org/apache/uima/util/Misc.java
Fri Apr 15 14:38:54 2016
@@ -33,12 +33,72 @@ import java.util.Collection;
import java.util.List;
import java.util.WeakHashMap;
import java.util.function.Consumer;
+import java.util.regex.Pattern;
import org.apache.uima.UIMARuntimeException;
import org.apache.uima.cas.CAS;
public class Misc {
+ public static final String blanks = "
";
+ public static final String dots = "...";
+
+ private static final Pattern whitespace = Pattern.compile("\\s");
+
+ public static String replaceWhiteSpace(String s, String replacement) {
+ return whitespace.matcher(s).replaceAll(replacement);
+ }
+
+
+ /**
+ * @param s starting frames above invoker
+ * @param n max number of callers to return
+ * @return x called by: y ...
+ */
+ public static StringBuilder getCallers(final int s, final int n) {
+ StackTraceElement[] e = Thread.currentThread().getStackTrace();
+ StringBuilder sb = new StringBuilder();
+ for (int i = s + 2; i < s + n + 3; i++) {
+ if (i >= e.length) break;
+ if (i != s + 2) {
+ sb.append(" called_by: ");
+ }
+ sb.append(formatcaller(e[i]));
+ }
+ return sb;
+ }
+
+ /**
+ * @return the name of the caller in the stack
+ */
+ public static String getCaller() {
+ StackTraceElement[] e = Thread.currentThread().getStackTrace();
+ return formatcaller(e[4]) + "called by: " + formatcaller(e[5]);
+ }
+
+ private static String formatcaller(StackTraceElement e) {
+ String n = e.getClassName();
+ return n.substring(1 + n.lastIndexOf('.')) + "." + e.getMethodName() + "["
+ e.getLineNumber() + "]";
+ }
+
+ public static String elide(String s, int n) {
+ return elide(s, n, true);
+ }
+
+ public static String elide(String s, int n, boolean pad) {
+ if (s == null) {
+ s = "null";
+ }
+ int sl = s.length();
+ if (sl <= n) {
+ return s + (pad ? blanks.substring(0, n - sl) : "");
+ }
+ int dl = 1; //(n < 11) ? 1 : (n < 29) ? 2 : 3; // number of dots
+ int ss = (n - dl) / 2;
+ int ss2 = ss + (( ss * 2 == (n - dl)) ? 0 : 1);
+ return s.substring(0, ss) + dots.substring(0, dl) + s.substring(sl - ss2);
+ }
+
public final static MethodHandles.Lookup UIMAlookup = MethodHandles.lookup();
/**
@@ -232,10 +292,19 @@ public class Misc {
throw new UIMARuntimeException(UIMARuntimeException.INTERNAL_ERROR);
}
+ public static void assertUie(boolean v, Exception e) {
+ if (!v)
+ throw new UIMARuntimeException(e, UIMARuntimeException.INTERNAL_ERROR);
+ }
+
public static void internalError() {
assertUie(false);
}
+ public static void internalError(Exception e) {
+ assertUie(false, e);
+ }
+
// The hash function is derived from murmurhash3 32 bit, which
// carries this statement:
@@ -327,19 +396,6 @@ public class Misc {
}
/**
- * @return the name of the caller in the stack
- */
- public static String getCaller() {
- StackTraceElement[] e = Thread.currentThread().getStackTrace();
- return formatcaller(e[4]) + "called by: " + formatcaller(e[5]);
- }
-
- private static String formatcaller(StackTraceElement e) {
- String n = e.getClassName();
- return n.substring(1 + n.lastIndexOf('.')) + "." + e.getMethodName() + "["
+ e.getLineNumber() + "]";
- }
-
- /**
* format a list of items for pretty printing as [item1, item2, ... ]
* @param items to print
* @return [item1, item2, ... ]
@@ -398,6 +454,17 @@ public class Misc {
//}
// public static void main(String[] args) {
+// foo();
+// // String s = "0123456789abcdef0123456789abcde";
+// for (int i = 3; i < 35; i++) {
+// System.out.print(Integer.toString(i) + " " + elide(s, i));
+// System.out.println("|");
+// }
+// }
+// private static void foo() {
+// System.out.format(" callers %n%s%ndone%n", getCallers(0, 2));
+//
+// }
// System.out.println("should be false - not defined: " +
getNoValueSystemProperty("foo"));
// System.setProperty("foo", "");
// System.out.println("should be true - defined, 0 len str value: " +
getNoValueSystemProperty("foo"));
