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| Interfaces and implementations used by query node processors |
| |
| <h2>Query Node Processors</h2> |
| <p> |
| The package <tt>org.apache.lucene.queryParser.processors</tt> contains interfaces |
| that should be implemented by every query node processor. |
| </p> |
| <p> |
| The interface that every query node processor should implement is {@link org.apache.lucene.queryParser.core.processors.QueryNodeProcessor}. |
| </p> |
| <p> |
| 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. |
| </p> |
| |
| <p> |
| 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. |
| </p> |
| |
| <p> |
| A pipeline of processors can be assembled using {@link org.apache.lucene.queryParser.core.processors.QueryNodeProcessorPipeline}. |
| </p> |
| |
| <p> |
| 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. |
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