ICU-13727 add U_INPUT_TOO_LONG_ERROR & ICUInputTooLongException

icu4c/source/common/unicode/utypes.h

@@ -479,6 +479,14 @@ typedef enum UErrorCode {
     U_COLLATOR_VERSION_MISMATCH = 28,   /**< Collator version is not compatible with the base version */
     U_USELESS_COLLATOR_ERROR  = 29,     /**< Collator is options only and no base is specified */
     U_NO_WRITE_PERMISSION     = 30,     /**< Attempt to modify read-only or constant data. */
+    /**
+     * The input is impractically long for an operation.
+     * It is rejected because it may lead to problems such as excessive
+     * processing time, stack depth, or heap memory requirements.
+     *
+     * @draft ICU 68
+     */
+    U_INPUT_TOO_LONG_ERROR = 31,
 
 #ifndef U_HIDE_DEPRECATED_API
     /**

icu4c/source/common/utypes.cpp

@@ -104,7 +104,8 @@ _uErrorName[U_STANDARD_ERROR_LIMIT]={
     "U_INVALID_STATE_ERROR",
     "U_COLLATOR_VERSION_MISMATCH",
     "U_USELESS_COLLATOR_ERROR",
-    "U_NO_WRITE_PERMISSION"
+    "U_NO_WRITE_PERMISSION",
+    "U_INPUT_TOO_LONG_ERROR"
 };
 static const char * const
 _uFmtErrorName[U_FMT_PARSE_ERROR_LIMIT - U_FMT_PARSE_ERROR_START] = {

icu4j/main/classes/core/src/com/ibm/icu/util/ICUInputTooLongException.java

@@ -0,0 +1,58 @@
+// © 2020 and later: Unicode, Inc. and others.
+// License & terms of use: http://www.unicode.org/copyright.html
+package com.ibm.icu.util;
+
+/**
+ * The input is impractically long for an operation.
+ * It is rejected because it may lead to problems such as excessive
+ * processing time, stack depth, or heap memory requirements.
+ *
+ * @draft ICU 68
+ * @provisional This API might change or be removed in a future release.
+ */
+public class ICUInputTooLongException extends ICUException {
+    private static final long serialVersionUID = -2602876786689338226L;
+
+    /**
+     * Default constructor.
+     *
+     * @draft ICU 68
+     * @provisional This API might change or be removed in a future release.
+     */
+    public ICUInputTooLongException() {
+    }
+
+    /**
+     * Constructor.
+     *
+     * @param message exception message string
+     * @draft ICU 68
+     * @provisional This API might change or be removed in a future release.
+     */
+    public ICUInputTooLongException(String message) {
+        super(message);
+    }
+
+    /**
+     * Constructor.
+     *
+     * @param cause original exception
+     * @draft ICU 68
+     * @provisional This API might change or be removed in a future release.
+     */
+    public ICUInputTooLongException(Throwable cause) {
+        super(cause);
+    }
+
+    /**
+     * Constructor.
+     *
+     * @param message exception message string
+     * @param cause original exception
+     * @draft ICU 68
+     * @provisional This API might change or be removed in a future release.
+     */
+    public ICUInputTooLongException(String message, Throwable cause) {
+        super(message, cause);
+    }
+}

icu4j/main/tests/core/src/com/ibm/icu/dev/test/serializable/SerializableTestUtility.java

@@ -47,6 +47,7 @@ import com.ibm.icu.util.DateTimeRule;
 import com.ibm.icu.util.GregorianCalendar;
 import com.ibm.icu.util.ICUCloneNotSupportedException;
 import com.ibm.icu.util.ICUException;
+import com.ibm.icu.util.ICUInputTooLongException;
 import com.ibm.icu.util.ICUUncheckedIOException;
 import com.ibm.icu.util.InitialTimeZoneRule;
 import com.ibm.icu.util.RuleBasedTimeZone;
@@ -749,6 +750,18 @@ public class SerializableTestUtility {
         }
     }
 
+    private static class ICUInputTooLongExceptionHandler extends ExceptionHandlerBase {
+        @Override
+        public Object[] getTestObjects() {
+            return new ICUInputTooLongException[] {
+                    new ICUInputTooLongException(),
+                    new ICUInputTooLongException("msg1"),
+                    new ICUInputTooLongException(new RuntimeException("rte1")),
+                    new ICUInputTooLongException("msg2", new RuntimeException("rte2"))
+            };
+        }
+    }
+
     private static HashMap map = new HashMap();
 
     static {
@@ -843,6 +856,7 @@ public class SerializableTestUtility {
         map.put("com.ibm.icu.util.ICUException", new ICUExceptionHandler());
         map.put("com.ibm.icu.util.ICUUncheckedIOException", new ICUUncheckedIOExceptionHandler());
         map.put("com.ibm.icu.util.ICUCloneNotSupportedException", new ICUCloneNotSupportedExceptionHandler());
+        map.put("com.ibm.icu.util.ICUInputTooLongException", new ICUInputTooLongExceptionHandler());
     }
 
     /*