Example usage for org.apache.lucene.queries.function.valuesource BytesRefFieldSource BytesRefFieldSource

Introduction

In this page you can find the example usage for org.apache.lucene.queries.function.valuesource BytesRefFieldSource BytesRefFieldSource.

Prototype

public BytesRefFieldSource(String field) 

Source Link

Usage

From source file:org.apache.solr.analytics.statistics.StatsCollectorSupplierFactory.java

License:Apache License

/**
 *  Builds a value source for a given field, making sure that the field fits a given source type.
 * @param schema the schema//  w ww. j  a v  a  2 s  . c  om
 * @param expressionString The name of the field to build a Field Source from.
 * @param sourceType FIELD_TYPE for any type of field, NUMBER_TYPE for numeric fields, 
 * DATE_TYPE for date fields and STRING_TYPE for string fields.
 * @return a value source
 */
private static ValueSource buildFieldSource(IndexSchema schema, String expressionString, int sourceType) {
    SchemaField sf;
    try {
        sf = schema.getField(expressionString);
    } catch (SolrException e) {
        throw new SolrException(ErrorCode.BAD_REQUEST, "The field " + expressionString + " does not exist.", e);
    }
    FieldType type = sf.getType();
    if (type instanceof TrieIntField) {
        if (sourceType != NUMBER_TYPE && sourceType != FIELD_TYPE) {
            return null;
        }
        return new IntFieldSource(expressionString) {
            public String description() {
                return field;
            }
        };
    } else if (type instanceof TrieLongField) {
        if (sourceType != NUMBER_TYPE && sourceType != FIELD_TYPE) {
            return null;
        }
        return new LongFieldSource(expressionString) {
            public String description() {
                return field;
            }
        };
    } else if (type instanceof TrieFloatField) {
        if (sourceType != NUMBER_TYPE && sourceType != FIELD_TYPE) {
            return null;
        }
        return new FloatFieldSource(expressionString) {
            public String description() {
                return field;
            }
        };
    } else if (type instanceof TrieDoubleField) {
        if (sourceType != NUMBER_TYPE && sourceType != FIELD_TYPE) {
            return null;
        }
        return new DoubleFieldSource(expressionString) {
            public String description() {
                return field;
            }
        };
    } else if (type instanceof TrieDateField) {
        if (sourceType != DATE_TYPE && sourceType != FIELD_TYPE) {
            return null;
        }
        return new DateFieldSource(expressionString) {
            public String description() {
                return field;
            }
        };
    } else if (type instanceof StrField) {
        if (sourceType != STRING_TYPE && sourceType != FIELD_TYPE) {
            return null;
        }
        return new BytesRefFieldSource(expressionString) {
            public String description() {
                return field;
            }
        };
    }
    throw new SolrException(ErrorCode.BAD_REQUEST,
            type.toString() + " is not a supported field type in Solr Analytics.");
}

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