Bugzilla #53065: Restore lookup on Event message lookup field part. Add locale field to Event to enable locale dependent deferred bundle load during lookup field part substitution.

git-svn-id: https://svn.apache.org/repos/asf/xmlgraphics/fop/trunk@1324913 13f79535-47bb-0310-9956-ffa450edef68

2 files changed, 72 insertions, 50 deletions

diff --git a/src/java/org/apache/fop/events/Event.java b/src/java/org/apache/fop/events/Event.java
index ffec9473e..6c4553228 100644
--- a/src/java/org/apache/fop/events/Event.java
+++ b/src/java/org/apache/fop/events/Event.java
@@ -21,27 +21,28 @@ package org.apache.fop.events;
 
 import java.util.Collections;
 import java.util.EventObject;
+import java.util.Locale;
 import java.util.Map;
 
 import org.apache.fop.events.model.EventSeverity;
 
 /**
  * This is the default event class used by this package. Each event has a unique event identifier
- * (a String), a severity indicator and a map of name/value pairs.
+ * (a String), a severity indicator, a locale (for formatting event messages), and a map of
+ * name/value pairs.
  */
 public class Event extends EventObject {
 
     private static final long serialVersionUID = -1310594422868258083L;
 
     private String eventGroupID;
-
     private String eventKey;
-
     private EventSeverity severity;
+    private Locale locale;
     private Map<String, Object> params;
 
     /**
-     * Creates a new Event.
+     * Creates a new Event using default locale.
      * @param source the object that creates the event
      * @param eventID the unique identifier of the event
      * @param severity the severity level
@@ -49,6 +50,19 @@ public class Event extends EventObject {
      */
     public Event(Object source, String eventID, EventSeverity severity, Map<String, Object> params)
     {
+        this ( source, eventID, severity, Locale.getDefault(), params );
+    }
+
+    /**
+     * Creates a new Event.
+     * @param source the object that creates the event
+     * @param eventID the unique identifier of the event
+     * @param severity the severity level
+     * @param locale to use when formatting event (or null, which means use default locale)
+     * @param params the event parameters (a map of name/value pairs)
+     */
+    public Event(Object source, String eventID, EventSeverity severity, Locale locale, Map<String, Object> params)
+    {
         super(source);
         int pos = eventID.lastIndexOf('.');
         if (pos < 0 || pos == eventID.length() - 1) {
@@ -58,6 +72,7 @@ public class Event extends EventObject {
             eventKey = eventID.substring(pos + 1);
         }
         setSeverity(severity);
+        this.locale = locale;
         this.params = params;
     }
 
@@ -107,6 +122,14 @@ public class Event extends EventObject {
     }
 
     /**
+     * Returns the locale.
+     * @return the locale
+     */
+    public Locale getLocale() {
+        return this.locale;
+    }
+
+    /**
      * Returns a parameter.
      * @param key the key to the parameter
      * @return the parameter value or null if no value with this key is found
diff --git a/src/java/org/apache/fop/events/EventFormatter.java b/src/java/org/apache/fop/events/EventFormatter.java
index 072cddd24..32fd7f110 100644
--- a/src/java/org/apache/fop/events/EventFormatter.java
+++ b/src/java/org/apache/fop/events/EventFormatter.java
@@ -47,25 +47,28 @@ public final class EventFormatter {
         //utility class
     }
 
+    private static ResourceBundle getBundle ( String groupID, Locale locale ) {
+        ResourceBundle bundle;
+        String baseName = ( groupID != null ) ? groupID : EventFormatter.class.getName();
+        try {
+            ClassLoader classLoader = EventFormatter.class.getClassLoader();
+            bundle = XMLResourceBundle.getXMLBundle ( baseName, locale, classLoader );
+        } catch ( MissingResourceException e ) {
+            if ( log.isTraceEnabled() ) {
+                log.trace ( "No XMLResourceBundle for " + baseName + " available." );
+            }
+            bundle = null;
+        }
+        return bundle;
+    }
+
     /**
      * Formats an event using the default locale.
      * @param event the event
      * @return the formatted message
      */
-    public static String format(Event event) {
-        ResourceBundle bundle = null;
-        String groupID = event.getEventGroupID();
-        if (groupID != null) {
-            try {
-                 bundle = XMLResourceBundle.getXMLBundle(
-                        groupID,
-                        EventFormatter.class.getClassLoader());
-            } catch (MissingResourceException mre) {
-                throw new IllegalStateException("No XMLResourceBundle for " + groupID
-                        + " available.");
-            }
-        }
-        return format(event, bundle);
+    public static String format ( Event event ) {
+        return format ( event, event.getLocale() );
     }
 
     /**
@@ -75,31 +78,19 @@ public final class EventFormatter {
      * @return the formatted message
      */
     public static String format(Event event, Locale locale) {
-        ResourceBundle bundle = null;
-        String groupID = event.getEventGroupID();
-        if (groupID != null) {
-            try {
-                 bundle = XMLResourceBundle.getXMLBundle(
-                        groupID, locale,
-                        EventFormatter.class.getClassLoader());
-            } catch (MissingResourceException mre) {
-                if (log.isTraceEnabled()) {
-                    log.trace("No XMLResourceBundle for " + groupID + " available.");
-                }
-            }
-        }
-        if (bundle == null) {
-            bundle = XMLResourceBundle.getXMLBundle(
-                    EventFormatter.class.getName(),
-                    locale,
-                    EventFormatter.class.getClassLoader());
-        }
-        return format(event, bundle);
+        return format ( event, getBundle ( event.getEventGroupID(), locale ) );
     }
 
-    private static String format(Event event, ResourceBundle bundle) {
-        String template = bundle.getString(event.getEventKey());
-        return format(event, processIncludes(template, bundle));
+    private static String format ( Event event, ResourceBundle bundle ) {
+        assert event != null;
+        String key = event.getEventKey();
+        String template;
+        if ( bundle != null ) {
+            template = bundle.getString ( key );
+        } else {
+            template = "Missing bundle. Can't lookup event key: '" + key + "'.";
+        }
+        return format ( event, processIncludes ( template, bundle ) );
     }
 
     private static String processIncludes(String template, ResourceBundle bundle) {
@@ -118,14 +109,16 @@ public final class EventFormatter {
     private static int processIncludesInner(CharSequence template, StringBuffer sb,
             ResourceBundle bundle) {
         int replacements = 0;
-        Matcher m = INCLUDES_PATTERN.matcher(template);
-        while (m.find()) {
-            String include = m.group();
-            include = include.substring(2, include.length() - 2);
-            m.appendReplacement(sb, bundle.getString(include));
-            replacements++;
+        if ( bundle != null ) {
+            Matcher m = INCLUDES_PATTERN.matcher(template);
+            while (m.find()) {
+                String include = m.group();
+                include = include.substring(2, include.length() - 2);
+                m.appendReplacement(sb, bundle.getString(include));
+                replacements++;
+            }
+            m.appendTail(sb);
         }
-        m.appendTail(sb);
         return replacements;
     }
 
@@ -141,6 +134,8 @@ public final class EventFormatter {
         Map params = new java.util.HashMap(event.getParams());
         params.put("source", event.getSource());
         params.put("severity", event.getSeverity());
+        params.put("groupID", event.getEventGroupID());
+        params.put("locale", event.getLocale());
         return format.format(params);
     }
 
@@ -157,8 +152,12 @@ public final class EventFormatter {
         }
 
         public void write(StringBuffer sb, Map params) {
-            // TODO there's no defaultBundle anymore
-//            sb.append(defaultBundle.getString(getKey(params)));
+            String groupID = (String) params.get("groupID");
+            Locale locale = (Locale) params.get("locale");
+            ResourceBundle bundle = getBundle ( groupID, locale );
+            if ( bundle != null ) {
+                sb.append(bundle.getString(getKey(params)));
+            }
         }
 
         private String getKey(Map params) {