The package org.apache.lucene.queryParser.processors contains interfaces that should be implemented by every query node processor.
The interface that every query node processor should implement is {@link org.apache.lucene.queryParser.core.processors.QueryNodeProcessor}.
A query node processor should be used to process a {@link org.apache.lucene.queryParser.core.nodes.QueryNode} tree. {@link org.apache.lucene.queryParser.core.nodes.QueryNode} trees can be programmatically created or generated by a text parser. See {@link org.apache.lucene.queryParser.core.parser} for more details about text parsers.
A query node processor should be used to process a {@link org.apache.lucene.queryParser.core.nodes.QueryNode} tree. {@link org.apache.lucene.queryParser.core.nodes.QueryNode} trees can be programmatically created or generated by a text parser. See {@link org.apache.lucene.queryParser.core.parser} for more details about text parsers.
A pipeline of processors can be assembled using {@link org.apache.lucene.queryParser.core.processors.QueryNodeProcessorPipeline}.
Implementors may want to extend {@link org.apache.lucene.queryParser.core.processors.QueryNodeProcessorImpl}, which simplifies the implementation, because it walks automatically the {@link org.apache.lucene.queryParser.core.nodes.QueryNode}. See {@link org.apache.lucene.queryParser.core.processors.QueryNodeProcessorImpl} for more details.