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| 1 | +package com.databricks.jdbc.api.impl; |
| 2 | + |
| 3 | +import com.databricks.jdbc.api.IDatabricksGeospatial; |
| 4 | +import com.databricks.jdbc.api.impl.converters.WKTConverter; |
| 5 | +import com.databricks.jdbc.exception.DatabricksValidationException; |
| 6 | +import com.databricks.jdbc.log.JdbcLogger; |
| 7 | +import com.databricks.jdbc.log.JdbcLoggerFactory; |
| 8 | +import java.util.Objects; |
| 9 | + |
| 10 | +/** |
| 11 | + * Abstract base class for geospatial data types in Databricks JDBC driver. |
| 12 | + * |
| 13 | + * <p>This class provides common functionality for both GEOMETRY and GEOGRAPHY types, including |
| 14 | + * storage of WKT (Well-Known Text) format data and access to both WKT and WKB representations. |
| 15 | + */ |
| 16 | +public abstract class AbstractDatabricksGeospatial implements IDatabricksGeospatial { |
| 17 | + |
| 18 | + private static final JdbcLogger LOGGER = |
| 19 | + JdbcLoggerFactory.getLogger(AbstractDatabricksGeospatial.class); |
| 20 | + |
| 21 | + private final String wkt; |
| 22 | + private final int srid; // Spatial Reference System Identifier |
| 23 | + |
| 24 | + /** |
| 25 | + * Constructs an AbstractDatabricksGeospatial with the specified WKT and SRID. |
| 26 | + * |
| 27 | + * @param wkt the Well-Known Text representation of the geospatial object |
| 28 | + * @param srid the Spatial Reference System Identifier |
| 29 | + * @throws DatabricksValidationException if the WKT is invalid |
| 30 | + */ |
| 31 | + protected AbstractDatabricksGeospatial(String wkt, int srid) |
| 32 | + throws DatabricksValidationException { |
| 33 | + if (wkt == null || wkt.trim().isEmpty()) { |
| 34 | + LOGGER.error("WKT string cannot be null or empty"); |
| 35 | + throw new DatabricksValidationException("WKT string cannot be null or empty"); |
| 36 | + } |
| 37 | + |
| 38 | + this.wkt = wkt.trim(); |
| 39 | + this.srid = srid; |
| 40 | + } |
| 41 | + |
| 42 | + /** |
| 43 | + * Returns the Well-Known Binary (WKB) representation of the geospatial object. |
| 44 | + * |
| 45 | + * @return the WKB representation as a byte array |
| 46 | + * @throws DatabricksValidationException if WKT to WKB conversion fails |
| 47 | + */ |
| 48 | + @Override |
| 49 | + public byte[] getWKB() throws DatabricksValidationException { |
| 50 | + return WKTConverter.toWKB(wkt); |
| 51 | + } |
| 52 | + |
| 53 | + /** |
| 54 | + * Returns the Spatial Reference System Identifier (SRID) of the geospatial object. |
| 55 | + * |
| 56 | + * @return the SRID value |
| 57 | + */ |
| 58 | + @Override |
| 59 | + public int getSRID() { |
| 60 | + return srid; |
| 61 | + } |
| 62 | + |
| 63 | + /** |
| 64 | + * Returns the Well-Known Text (WKT) representation of the geospatial object. |
| 65 | + * |
| 66 | + * @return the WKT string |
| 67 | + */ |
| 68 | + @Override |
| 69 | + public String getWKT() { |
| 70 | + return wkt; |
| 71 | + } |
| 72 | + |
| 73 | + /** |
| 74 | + * Returns a string representation of the geospatial object in EWKT format. |
| 75 | + * |
| 76 | + * @return the EWKT string representation |
| 77 | + */ |
| 78 | + @Override |
| 79 | + public String toString() { |
| 80 | + return String.format("SRID=%d;%s", srid, wkt); |
| 81 | + } |
| 82 | + |
| 83 | + /** |
| 84 | + * Checks if this geospatial object is equal to another object. |
| 85 | + * |
| 86 | + * @param obj the object to compare |
| 87 | + * @return true if the objects are equal, false otherwise |
| 88 | + */ |
| 89 | + @Override |
| 90 | + public boolean equals(Object obj) { |
| 91 | + if (this == obj) { |
| 92 | + return true; |
| 93 | + } |
| 94 | + if (obj == null || getClass() != obj.getClass()) { |
| 95 | + return false; |
| 96 | + } |
| 97 | + |
| 98 | + AbstractDatabricksGeospatial that = (AbstractDatabricksGeospatial) obj; |
| 99 | + return srid == that.srid && wkt.equals(that.wkt); |
| 100 | + } |
| 101 | + |
| 102 | + /** |
| 103 | + * Returns the hash code for this geospatial object. |
| 104 | + * |
| 105 | + * @return the hash code |
| 106 | + */ |
| 107 | + @Override |
| 108 | + public int hashCode() { |
| 109 | + return Objects.hash(wkt, srid); |
| 110 | + } |
| 111 | + |
| 112 | + /** |
| 113 | + * Returns the data type of the geospatial object. |
| 114 | + * |
| 115 | + * @return the type as a string, either "GEOMETRY" or "GEOGRAPHY" |
| 116 | + */ |
| 117 | + @Override |
| 118 | + public abstract String getType(); |
| 119 | +} |
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