1 files changed, 85 insertions, 0 deletions
diff --git a/qpid/java/common/src/main/java/org/apache/qpid/messaging/util/Parser.java b/qpid/java/common/src/main/java/org/apache/qpid/messaging/util/Parser.java
new file mode 100644
index 0000000000..2e983f5165
--- /dev/null
+++ b/qpid/java/common/src/main/java/org/apache/qpid/messaging/util/Parser.java
@@ -0,0 +1,85 @@
+/*
+ *
+ * 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.qpid.messaging.util;
+
+import java.util.ArrayList;
+import java.util.List;
+
+
+/**
+ * Parser
+ *
+ */
+
+class Parser
+{
+
+    private List<Token> tokens;
+    private int idx = 0;
+
+    Parser(List<Token> tokens)
+    {
+        this.tokens = tokens;
+        this.idx = 0;
+    }
+
+    Token next()
+    {
+        return tokens.get(idx);
+    }
+
+    boolean matches(Token.Type ... types)
+    {
+        for (Token.Type t : types)
+        {
+            if (next().getType() == t)
+            {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    Token eat(Token.Type ... types)
+    {
+        if (types.length > 0 && !matches(types))
+        {
+            throw new ParseError(next(), types);
+        }
+        else
+        {
+            Token t = next();
+            idx += 1;
+            return t;
+        }
+    }
+
+    List<Token> eat_until(Token.Type ... types)
+    {
+        List<Token> result = new ArrayList();
+        while (!matches(types))
+        {
+            result.add(eat());
+        }
+        return result;
+    }
+
+}