Examples with SyntaxParser org.apache.lucene.queryparser.flexible.core.parser.SyntaxParser used on opensource projects

Example 1 with SyntaxParser

use of org.apache.lucene.queryparser.flexible.core.parser.SyntaxParser in project lucene-solr by apache.

the class TestSpanQueryParserSimpleSample method testBasicDemo.

public void testBasicDemo() throws Exception {
    SyntaxParser queryParser = new StandardSyntaxParser();
    // convert the CharSequence into a QueryNode tree
    QueryNode queryTree = queryParser.parse("body:text", null);
    // create a config handler with a attribute used in
    // UniqueFieldQueryNodeProcessor
    QueryConfigHandler spanQueryConfigHandler = new SpansQueryConfigHandler();
    spanQueryConfigHandler.set(SpansQueryConfigHandler.UNIQUE_FIELD, "index");
    // set up the processor pipeline with the ConfigHandler
    // and create the pipeline for this simple demo
    QueryNodeProcessorPipeline spanProcessorPipeline = new QueryNodeProcessorPipeline(spanQueryConfigHandler);
    // @see SpansValidatorQueryNodeProcessor
    spanProcessorPipeline.add(new SpansValidatorQueryNodeProcessor());
    // @see UniqueFieldQueryNodeProcessor
    spanProcessorPipeline.add(new UniqueFieldQueryNodeProcessor());
    // print to show out the QueryNode tree before being processed
    if (VERBOSE)
        System.out.println(queryTree);
    // Process the QueryTree using our new Processors
    queryTree = spanProcessorPipeline.process(queryTree);
    // print to show out the QueryNode tree after being processed
    if (VERBOSE)
        System.out.println(queryTree);
    // create a instance off the Builder
    SpansQueryTreeBuilder spansQueryTreeBuilder = new SpansQueryTreeBuilder();
    // convert QueryNode tree to span query Objects
    SpanQuery spanquery = spansQueryTreeBuilder.build(queryTree);
    assertTrue(spanquery instanceof SpanTermQuery);
    assertEquals(spanquery.toString(), "index:text");
}