--- /dev/null
+package org.apache.lucene.queryParser.core.parser;
+
+/**
+ * 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.lucene.queryParser.core.QueryNodeParseException;
+import org.apache.lucene.queryParser.core.nodes.QueryNode;
+
+/**
+ * A parser needs to implement {@link SyntaxParser} interface
+ */
+public interface SyntaxParser {
+ /**
+ * @param query
+ * - query data to be parsed
+ * @param field
+ * - default field name
+ * @return QueryNode tree
+ */
+ public QueryNode parse(CharSequence query, CharSequence field)
+ throws QueryNodeParseException;
+}