QueryOptions.Builder (Google App Engine API for Java)

com.google.appengine.api.search

Class QueryOptions.Builder

  • java.lang.Object
    • com.google.appengine.api.search.QueryOptions.Builder
  • Enclosing class:
    QueryOptions


    public static final class QueryOptions.Builder
    extends java.lang.Object
    A builder which constructs QueryOptions objects.
    • Method Detail

      • setLimit

        public QueryOptions.Builder setLimit(int limit)
        Sets the limit on the number of documents to return in Results.
        Parameters:
        limit - the number of documents to return
        Returns:
        this Builder
        Throws:
        java.lang.IllegalArgumentException - if numDocumentsToReturn is not within acceptable range
      • setCursor

        public QueryOptions.Builder setCursor(Cursor cursor)
        Sets the cursor. The cursor is obtained from either a Results or one of the individual ScoredDocuments. This is illustrated from the following code fragment:

         Cursor cursor = Cursor.newBuilder().build();
        
         SearchResults results = index.search(
             Query.newBuilder()
                 .setOptions(QueryOptions.newBuilder()
                     .setLimit(20)
                     .setCursor(cursor)
                     .build())
                 .build("some query"));
        
         // If the Cursor is built without setPerResult(true), then
         // by default a single Cursor is returned with the
         // Results.
         cursor = results.getCursor();
        
         for (ScoredDocument result : results) {
             // If you set Cursor.newBuilder().setPerResult(true)
             // then a cursor is returned with each result.
             result.getCursor();
         
        Parameters:
        cursor - use a cursor returned from a previous set of search results as a starting point to retrieve the next set of results. This can get you better performance, and also improves the consistency of pagination through index updates
        Returns:
        this Builder
      • setOffset

        public QueryOptions.Builder setOffset(int offset)
        Sets the offset of the first result to return.
        Parameters:
        offset - the offset into all search results to return the limit amount of results
        Returns:
        this Builder
        Throws:
        java.lang.IllegalArgumentException - if the offset is negative or is larger than SearchApiLimits.SEARCH_MAXIMUM_OFFSET
      • setNumberFoundAccuracy

        public QueryOptions.Builder setNumberFoundAccuracy(int numberFoundAccuracy)
        Sets the accuracy requirement for Results.getNumberFound(). If set, getNumberFound() will be accurate up to at least that number. For example, when set to 100, any getNumberFound() <= 100 is accurate. This option may add considerable latency / expense, especially when used with setFieldsToReturn(String...).
        Parameters:
        numberFoundAccuracy - the minimum accuracy requirement
        Returns:
        this Builder
        Throws:
        java.lang.IllegalArgumentException - if the accuracy is not within acceptable range
      • setFieldsToReturn

        public QueryOptions.Builder setFieldsToReturn(java.lang.String... fields)
        Specifies one or more fields to return in results.
        Parameters:
        fields - the names of fields to return in results
        Returns:
        this Builder
        Throws:
        java.lang.IllegalArgumentException - if any of the field names is invalid
      • setFieldsToSnippet

        public QueryOptions.Builder setFieldsToSnippet(java.lang.String... fieldsToSnippet)
        Specifies one or more fields to snippet in results. Snippets will be returned as fields with the same names in ScoredDocument.getExpressions().
        Parameters:
        fieldsToSnippet - the names of fields to snippet in results
        Returns:
        this Builder
        Throws:
        java.lang.IllegalArgumentException - if any of the field names is invalid
      • addExpressionToReturn

        public QueryOptions.Builder addExpressionToReturn(FieldExpression expression)
        Adds a FieldExpression to return in search results.
        Parameters:
        expression - a named expression to compute and return in results
        Returns:
        this Builder
      • build

        public QueryOptions build()
        Construct the final message.
        Returns:
        the QueryOptions built from the parameters entered on this Builder
        Throws:
        java.lang.IllegalArgumentException - if the search request is invalid

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