1 files changed, 81 insertions, 0 deletions
diff --git a/velocity-engine-core/src/main/java/org/apache/velocity/runtime/ParserPoolImpl.java b/velocity-engine-core/src/main/java/org/apache/velocity/runtime/ParserPoolImpl.java
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+++ b/velocity-engine-core/src/main/java/org/apache/velocity/runtime/ParserPoolImpl.java
@@ -0,0 +1,81 @@
+package org.apache.velocity.runtime;
+
+/*
+ * 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.
+ */
+
+import org.apache.velocity.runtime.parser.CharStream;
+import org.apache.velocity.runtime.parser.Parser;
+import org.apache.velocity.util.SimplePool;
+import org.slf4j.Logger;
+
+/**
+ * This wraps the original parser SimplePool class.  It also handles
+ * instantiating ad-hoc parsers if none are available.
+ *
+ * @author <a href="mailto:sergek@lokitech.com">Serge Knystautas</a>
+ * @version $Id: RuntimeInstance.java 384374 2006-03-08 23:19:30Z nbubna $
+ * @since 1.5
+ */
+public class ParserPoolImpl implements ParserPool {
+
+    SimplePool pool = null;
+    int max = RuntimeConstants.NUMBER_OF_PARSERS;
+    Logger log;
+
+    /**
+     * Create the underlying "pool".
+     * @param rsvc
+     */
+    @Override
+    public void initialize(RuntimeServices rsvc)
+    {
+        log = rsvc.getLog("parser");
+        max = rsvc.getInt(RuntimeConstants.PARSER_POOL_SIZE, RuntimeConstants.NUMBER_OF_PARSERS);
+        pool = new SimplePool(max);
+
+        for (int i = 0; i < max; i++)
+        {
+            pool.put(rsvc.createNewParser());
+        }
+
+        log.debug("Created '{}' parsers.", max);
+    }
+
+    /**
+     * Call the wrapped pool.  If none are available, it will create a new
+     * temporary one.
+     * @return A parser Object.
+     */
+    @Override
+    public Parser get()
+    {
+        return (Parser) pool.get();
+    }
+
+    /**
+     * Call the wrapped pool.
+     * @param parser
+     */
+    @Override
+    public void put(Parser parser)
+    {
+        parser.ReInit((CharStream) null);
+        pool.put(parser);
+    }
+}