JAL-3026 srcjar files for VARNA and log4j

[jalview.git] / srcjar / org / apache / log4j / rewrite / PropertyRewritePolicy.java

diff --git a/srcjar/org/apache/log4j/rewrite/PropertyRewritePolicy.java b/srcjar/org/apache/log4j/rewrite/PropertyRewritePolicy.java
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+++ b/srcjar/org/apache/log4j/rewrite/PropertyRewritePolicy.java
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+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.log4j.rewrite;
+
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.Iterator;
+import java.util.Map;
+import java.util.StringTokenizer;
+
+import org.apache.log4j.Logger;
+import org.apache.log4j.spi.LoggingEvent;
+
+/**
+ * This policy rewrites events by adding
+ * a user-specified list of properties to the event.
+ * Existing properties are not modified.
+ *
+ * The combination of the RewriteAppender and this policy
+ * performs the same actions as the PropertyFilter from log4j 1.3.
+ */
+
+public class PropertyRewritePolicy implements RewritePolicy {
+    private Map properties = Collections.EMPTY_MAP;
+    public PropertyRewritePolicy() {
+    }
+
+    /**
+     * Set a string representing the property name/value pairs.
+     * 
+     * Form: propname1=propvalue1,propname2=propvalue2
+     * 
+     * @param props
+     */
+    public void setProperties(String props) {
+        Map hashTable = new HashMap();
+        StringTokenizer pairs = new StringTokenizer(props, ",");
+        while (pairs.hasMoreTokens()) {
+            StringTokenizer entry = new StringTokenizer(pairs.nextToken(), "=");
+            hashTable.put(entry.nextElement().toString().trim(), entry.nextElement().toString().trim());
+        }
+        synchronized(this) {
+            properties = hashTable;
+        }
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public LoggingEvent rewrite(final LoggingEvent source) {
+        if (!properties.isEmpty()) {
+            Map rewriteProps = new HashMap(source.getProperties());
+            for(Iterator iter = properties.entrySet().iterator();
+                    iter.hasNext();
+                    ) {
+                Map.Entry entry = (Map.Entry) iter.next();
+                if (!rewriteProps.containsKey(entry.getKey())) {
+                    rewriteProps.put(entry.getKey(), entry.getValue());
+                }
+            }
+
+            return new LoggingEvent(
+                    source.getFQNOfLoggerClass(),
+                    source.getLogger() != null ? source.getLogger(): Logger.getLogger(source.getLoggerName()), 
+                    source.getTimeStamp(),
+                    source.getLevel(),
+                    source.getMessage(),
+                    source.getThreadName(),
+                    source.getThrowableInformation(),
+                    source.getNDC(),
+                    source.getLocationInformation(),
+                    rewriteProps);
+        }
+        return source;
+    }
+
+
+
+}