- * It will, when parse(String query) is called, construct a query like this
- * (assuming the query consists of two terms and you specify the two fields
- * title and body):
- *
- * (title:term1 body:term1) (title:term2 body:term2)
- *
- *
- * - * When setDefaultOperator(AND_OPERATOR) is set, the result will be: - *
- * - *
- * +(title:term1 body:term1) +(title:term2 body:term2)
- *
- *
- * - * When you pass a boost (title=>5 body=>10) you can get - *
- * - *
- * +(title:term1^5.0 body:term1^10.0) +(title:term2^5.0 body:term2^10.0)
- *
- *
- * - * In other words, all the query's terms must appear, but it doesn't matter in - * what fields they appear. - *
- */ -public MultiFieldQueryParserWrapper(String[] fields, Analyzer analyzer, Map
- * It will, when parse(String query) is called, construct a query like this
- * (assuming the query consists of two terms and you specify the two fields
- * title and body):
- *
- * (title:term1 body:term1) (title:term2 body:term2)
- *
- *
- * - * When setDefaultOperator(AND_OPERATOR) is set, the result will be: - *
- * - *
- * +(title:term1 body:term1) +(title:term2 body:term2)
- *
- *
- * - * In other words, all the query's terms must appear, but it doesn't matter in - * what fields they appear. - *
- */ - public MultiFieldQueryParserWrapper(String[] fields, Analyzer analyzer) { - super(null, analyzer); - - StandardQueryParser qpHelper = getQueryParserHelper(); - qpHelper.setAnalyzer(analyzer); - - qpHelper.setMultiFields(fields); - } - - /** - * Parses a query which searches on the fields specified. - *- * If x fields are specified, this effectively constructs: - * - *
- * <code> - * (field1:query1) (field2:query2) (field3:query3)...(fieldx:queryx) - * </code> - *- * - * @param queries - * Queries strings to parse - * @param fields - * Fields to search on - * @param analyzer - * Analyzer to use - * @throws ParseException - * if query parsing fails - * @throws IllegalArgumentException - * if the length of the queries array differs from the length of the - * fields array - */ - public static Query parse(String[] queries, String[] fields, Analyzer analyzer) - throws ParseException { - if (queries.length != fields.length) - throw new IllegalArgumentException("queries.length != fields.length"); - BooleanQuery bQuery = new BooleanQuery(); - for (int i = 0; i < fields.length; i++) { - QueryParserWrapper qp = new QueryParserWrapper(fields[i], analyzer); - Query q = qp.parse(queries[i]); - if (q != null && // q never null, just being defensive - (!(q instanceof BooleanQuery) || ((BooleanQuery) q).getClauses().length > 0)) { - bQuery.add(q, BooleanClause.Occur.SHOULD); - } - } - return bQuery; - } - - /** - * Parses a query, searching on the fields specified. Use this if you need to - * specify certain fields as required, and others as prohibited. - *
- * - *
- * Usage:
- * <code>
- * String[] fields = {"filename", "contents", "description"};
- * BooleanClause.Occur[] flags = {BooleanClause.Occur.SHOULD,
- * BooleanClause.Occur.MUST,
- * BooleanClause.Occur.MUST_NOT};
- * MultiFieldQueryParser.parse("query", fields, flags, analyzer);
- * </code>
- *
- *- * The code above would construct a query: - * - *
- * <code> - * (filename:query) +(contents:query) -(description:query) - * </code> - *- * - * @param query - * Query string to parse - * @param fields - * Fields to search on - * @param flags - * Flags describing the fields - * @param analyzer - * Analyzer to use - * @throws ParseException - * if query parsing fails - * @throws IllegalArgumentException - * if the length of the fields array differs from the length of the - * flags array - */ - public static Query parse(String query, String[] fields, - BooleanClause.Occur[] flags, Analyzer analyzer) throws ParseException { - if (fields.length != flags.length) - throw new IllegalArgumentException("fields.length != flags.length"); - BooleanQuery bQuery = new BooleanQuery(); - for (int i = 0; i < fields.length; i++) { - QueryParserWrapper qp = new QueryParserWrapper(fields[i], analyzer); - Query q = qp.parse(query); - if (q != null && // q never null, just being defensive - (!(q instanceof BooleanQuery) || ((BooleanQuery) q).getClauses().length > 0)) { - bQuery.add(q, flags[i]); - } - } - return bQuery; - } - - /** - * Parses a query, searching on the fields specified. Use this if you need to - * specify certain fields as required, and others as prohibited. - *
- * - *
- * Usage:
- * <code>
- * String[] query = {"query1", "query2", "query3"};
- * String[] fields = {"filename", "contents", "description"};
- * BooleanClause.Occur[] flags = {BooleanClause.Occur.SHOULD,
- * BooleanClause.Occur.MUST,
- * BooleanClause.Occur.MUST_NOT};
- * MultiFieldQueryParser.parse(query, fields, flags, analyzer);
- * </code>
- *
- *- * The code above would construct a query: - * - *
- * <code> - * (filename:query1) +(contents:query2) -(description:query3) - * </code> - *- * - * @param queries - * Queries string to parse - * @param fields - * Fields to search on - * @param flags - * Flags describing the fields - * @param analyzer - * Analyzer to use - * @throws ParseException - * if query parsing fails - * @throws IllegalArgumentException - * if the length of the queries, fields, and flags array differ - */ - public static Query parse(String[] queries, String[] fields, - BooleanClause.Occur[] flags, Analyzer analyzer) throws ParseException { - if (!(queries.length == fields.length && queries.length == flags.length)) - throw new IllegalArgumentException( - "queries, fields, and flags array have have different length"); - BooleanQuery bQuery = new BooleanQuery(); - for (int i = 0; i < fields.length; i++) { - QueryParserWrapper qp = new QueryParserWrapper(fields[i], analyzer); - Query q = qp.parse(queries[i]); - if (q != null && // q never null, just being defensive - (!(q instanceof BooleanQuery) || ((BooleanQuery) q).getClauses().length > 0)) { - bQuery.add(q, flags[i]); - } - } - return bQuery; - } - -}