package org.apache.lucene.queryParser.core.nodes;
/**
* 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.
*/
/**
* A query node implements {@link FieldableNode} interface to indicate that its
* children and itself are associated to a specific field.
*
* If it has any children which also implements this interface, it must ensure
* the children are associated to the same field.
*
*/
public interface FieldableNode extends QueryNode {
/**
* Returns the field associated to the node and every node under it.
*
* @return the field name
*/
CharSequence getField();
/**
* Associates the node to a field.
*
* @param fieldName
* the field name
*/
void setField(CharSequence fieldName);
}