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com.esproc.jdbc.ResultSetMetaData Maven / Gradle / Ivy
SPL(Structured Process Language) A programming language specially for structured data computing.
package com.esproc.jdbc;
import java.io.Externalizable;
import java.io.IOException;
import java.io.ObjectInput;
import java.io.ObjectOutput;
import java.sql.SQLException;
import java.sql.Types;
import java.util.ArrayList;
/**
* Implementation of java.sql.ResultSetMetaData
*
*/
public class ResultSetMetaData implements java.sql.ResultSetMetaData,
Externalizable {
private static final long serialVersionUID = 1L;
/**
* Type of the ResultSetMetaData
*/
/** Auto increment */
private static final int AUTO_INCREMENT = 1;
/** Case sensitive */
private static final int CASE_SENSITIVE = 2;
/** Can search */
private static final int SEARCHABLE = 3;
/** Is currency */
private static final int CURRENCY = 4;
/** Is signed */
private static final int SIGNED = 5;
/** Is read only */
private static final int READ_ONLY = 6;
/** Is writable */
private static final int WRITABLE = 7;
/** Is definitely writable */
private static final int DEFINITELY_WRITABLE = 8;
/**
* Number of columns
*/
private int colCount = 0;
/**
* Column names
*/
private ArrayList columnNames = null;
/**
* Column types
*/
private int[] columnTypes = null;
/**
* Column type names
*/
private ArrayList columnTypeNames = null;
/**
* Column names
*/
private ArrayList columnLabels = null;
/**
* Column class names
*/
private ArrayList columnClassNames = null;
/**
* Column display sizes
*/
private int[] columnDisplaySizes = null;
/**
* Schema names
*/
private ArrayList schemaNames = null;
/**
* Catalog names
*/
private ArrayList catalogNames = null;
/**
* Precisions
*/
private int[] precisions = null;
/**
* Scales
*/
private int[] scales = null;
/**
* Table names
*/
private ArrayList tableNames = null;
/**
* Column properties
*/
private int[] properties = null;
/**
* Whether the columns can be null
*/
private int[] nullables = null;
/**
* Constructor
*/
public ResultSetMetaData() {
}
/**
* Constructor
*
* @param type Constants defined above
*/
public ResultSetMetaData(byte type) {
JDBCUtil.log("ResultSetMetaData-1");
if (type == ResultSet.GET_PROCEDURES) {
colCount = 9;
columnNames = new ArrayList(colCount);
columnNames.add("PROCEDURE_CAT");
columnNames.add("PROCEDURE_SCHEM");
columnNames.add("PROCEDURE_NAME");
columnNames.add("reserved1");
columnNames.add("reserved2");
columnNames.add("reserved3");
columnNames.add("REMARKS");
columnNames.add("PROCEDURE_TYPE");
columnNames.add("SPECIFIC_NAME");
columnTypes = new int[colCount];
columnTypes[0] = java.sql.Types.VARCHAR;
columnTypes[1] = java.sql.Types.VARCHAR;
columnTypes[2] = java.sql.Types.VARCHAR;
columnTypes[3] = java.sql.Types.VARCHAR;
columnTypes[4] = java.sql.Types.VARCHAR;
columnTypes[5] = java.sql.Types.VARCHAR;
columnTypes[6] = java.sql.Types.VARCHAR;
columnTypes[7] = java.sql.Types.INTEGER;
columnTypes[8] = java.sql.Types.VARCHAR;
columnTypeNames = initArrayList(colCount);
columnTypeNames.add("String");
columnTypeNames.add("String");
columnTypeNames.add("String");
columnTypeNames.add("NULL");
columnTypeNames.add("NULL");
columnTypeNames.add("NULL");
columnTypeNames.add("String");
columnTypeNames.add("short");
columnTypeNames.add("String");
} else if (type == ResultSet.GET_PROCEDURE_COLUMNS) {
colCount = 20;
columnNames = new ArrayList(colCount);
columnNames.add("PROCEDURE_CAT");
columnNames.add("PROCEDURE_SCHEM");
columnNames.add("PROCEDURE_NAME");
columnNames.add("COLUMN_NAME");
columnNames.add("COLUMN_TYPE");
columnNames.add("DATA_TYPE");
columnNames.add("TYPE_NAME");
columnNames.add("precisions");
columnNames.add("LENGTH");
columnNames.add("scales");
columnNames.add("RADIX");
columnNames.add("nullables");
columnNames.add("REMARKS");
columnNames.add("COLUMN_DEF");
columnNames.add("SQL_DATA_TYPE");
columnNames.add("SQL_DATETIME_SUB");
columnNames.add("CHAR_OCTET_LENGTH");
columnNames.add("ORDINAL_POSITION");
columnNames.add("IS_NULLABLE");
columnNames.add("SPECIFIC_NAME");
columnTypes = new int[colCount];
columnTypes[0] = java.sql.Types.VARCHAR;
columnTypes[1] = java.sql.Types.VARCHAR;
columnTypes[2] = java.sql.Types.VARCHAR;
columnTypes[3] = java.sql.Types.VARCHAR;
columnTypes[4] = java.sql.Types.INTEGER;
columnTypes[5] = java.sql.Types.INTEGER;
columnTypes[6] = java.sql.Types.VARCHAR;
columnTypes[7] = java.sql.Types.INTEGER;
columnTypes[8] = java.sql.Types.INTEGER;
columnTypes[9] = java.sql.Types.INTEGER;
columnTypes[10] = java.sql.Types.INTEGER;
columnTypes[11] = java.sql.Types.INTEGER;
columnTypes[12] = java.sql.Types.VARCHAR;
columnTypes[13] = java.sql.Types.VARCHAR;
columnTypes[14] = java.sql.Types.INTEGER;
columnTypes[15] = java.sql.Types.INTEGER;
columnTypes[16] = java.sql.Types.INTEGER;
columnTypes[17] = java.sql.Types.INTEGER;
columnTypes[18] = java.sql.Types.VARCHAR;
columnTypes[19] = java.sql.Types.VARCHAR;
columnTypeNames = initArrayList(colCount);
columnTypeNames.add("String");
columnTypeNames.add("String");
columnTypeNames.add("String");
columnTypeNames.add("String");
columnTypeNames.add("Short");
columnTypeNames.add("int");
columnTypeNames.add("String");
columnTypeNames.add("int");
columnTypeNames.add("int");
columnTypeNames.add("short");
columnTypeNames.add("short");
columnTypeNames.add("short");
columnTypeNames.add("String");
columnTypeNames.add("String");
columnTypeNames.add("int");
columnTypeNames.add("int");
columnTypeNames.add("int");
columnTypeNames.add("int");
columnTypeNames.add("String");
columnTypeNames.add("String");
} else if (type == ResultSet.GET_SCHEMAS) {
colCount = 2;
columnNames = new ArrayList(colCount);
columnNames.add("TABLE_SCHEM");
columnNames.add("TABLE_CATALOG");
columnTypes = new int[colCount];
columnTypes[0] = java.sql.Types.VARCHAR;
columnTypes[1] = java.sql.Types.VARCHAR;
columnTypeNames = initArrayList(colCount);
columnTypeNames.add("String");
columnTypeNames.add("String");
} else if (type == ResultSet.GET_TABLES) {
colCount = 10;
columnNames = new ArrayList(colCount);
columnNames.add("TABLE_CAT");
columnNames.add("TABLE_SCHEM");
columnNames.add("TABLE_NAME");
columnNames.add("TABLE_TYPE");
columnNames.add("REMARKS");
columnNames.add("TYPE_CAT");
columnNames.add("TYPE_SCHEM");
columnNames.add("TYPE_NAME");
columnNames.add("SELF_REFERENCING_COL_NAME");
columnNames.add("REF_GENERATION");
columnTypes = new int[colCount];
columnTypes[0] = java.sql.Types.VARCHAR;
columnTypes[1] = java.sql.Types.VARCHAR;
columnTypes[2] = java.sql.Types.VARCHAR;
columnTypes[3] = java.sql.Types.VARCHAR;
columnTypes[4] = java.sql.Types.VARCHAR;
columnTypes[5] = java.sql.Types.VARCHAR;
columnTypes[6] = java.sql.Types.VARCHAR;
columnTypes[7] = java.sql.Types.VARCHAR;
columnTypes[8] = java.sql.Types.VARCHAR;
columnTypes[9] = java.sql.Types.VARCHAR;
columnTypeNames = initArrayList(colCount);
columnTypeNames.add("String");
columnTypeNames.add("String");
columnTypeNames.add("String");
columnTypeNames.add("String");
columnTypeNames.add("String");
columnTypeNames.add("String");
columnTypeNames.add("String");
columnTypeNames.add("String");
columnTypeNames.add("String");
columnTypeNames.add("String");
} else if (type == ResultSet.GET_COLUMNS) {
colCount = 24;
columnNames = new ArrayList(colCount);
columnNames.add("TABLE_CAT");
columnNames.add("TABLE_SCHEM");
columnNames.add("TABLE_NAME");
columnNames.add("COLUMN_NAME");
columnNames.add("DATA_TYPE");
columnNames.add("TYPE_NAME");
columnNames.add("COLUMN_SIZE");
columnNames.add("BUFFER_LENGTH");
columnNames.add("DECIMAL_DIGITS");
columnNames.add("NUM_PREC_RADIX");
columnNames.add("nullables");
columnNames.add("REMARKS");
columnNames.add("COLUMN_DEF");
columnNames.add("SQL_DATA_TYPE");
columnNames.add("SQL_DATETIME_SUB");
columnNames.add("CHAR_OCTET_LENGTH");
columnNames.add("ORDINAL_POSITION");
columnNames.add("IS_NULLABLE");
columnNames.add("SCOPE_CATLOG");
columnNames.add("SCOPE_SCHEMA");
columnNames.add("SCOPE_TABLE");
columnNames.add("SOURCE_DATA_TYPE");
columnNames.add("IS_AUTOINCREMENT");
columnNames.add("IS_GENERATEDCOLUMN");
columnTypes = new int[colCount];
columnTypes[0] = java.sql.Types.VARCHAR;
columnTypes[1] = java.sql.Types.VARCHAR;
columnTypes[2] = java.sql.Types.VARCHAR;
columnTypes[3] = java.sql.Types.VARCHAR;
columnTypes[4] = java.sql.Types.INTEGER;
columnTypes[5] = java.sql.Types.VARCHAR;
columnTypes[6] = java.sql.Types.INTEGER;
columnTypes[7] = java.sql.Types.INTEGER;
columnTypes[8] = java.sql.Types.INTEGER;
columnTypes[9] = java.sql.Types.INTEGER;
columnTypes[10] = java.sql.Types.INTEGER;
columnTypes[11] = java.sql.Types.VARCHAR;
columnTypes[12] = java.sql.Types.VARCHAR;
columnTypes[13] = java.sql.Types.INTEGER;
columnTypes[14] = java.sql.Types.INTEGER;
columnTypes[15] = java.sql.Types.INTEGER;
columnTypes[16] = java.sql.Types.INTEGER;
columnTypes[17] = java.sql.Types.VARCHAR;
columnTypes[18] = java.sql.Types.VARCHAR;
columnTypes[19] = java.sql.Types.VARCHAR;
columnTypes[20] = java.sql.Types.VARCHAR;
columnTypes[21] = java.sql.Types.INTEGER;
columnTypes[22] = java.sql.Types.VARCHAR;
columnTypes[23] = java.sql.Types.VARCHAR;
columnTypeNames = initArrayList(colCount);
columnTypeNames.add("String");
columnTypeNames.add("String");
columnTypeNames.add("String");
columnTypeNames.add("String");
columnTypeNames.add("int");
columnTypeNames.add("String");
columnTypeNames.add("int");
columnTypeNames.add("int");
columnTypeNames.add("int");
columnTypeNames.add("int");
columnTypeNames.add("int");
columnTypeNames.add("String");
columnTypeNames.add("String");
columnTypeNames.add("int");
columnTypeNames.add("int");
columnTypeNames.add("int");
columnTypeNames.add("int");
columnTypeNames.add("String");
columnTypeNames.add("String");
columnTypeNames.add("String");
columnTypeNames.add("String");
columnTypeNames.add("short");
columnTypeNames.add("String");
columnTypeNames.add("String");
} else if (type == ResultSet.GET_CATALOGS) {
colCount = 1;
columnNames = new ArrayList(colCount);
columnNames.add("TABLE_CAT");
columnTypes = new int[colCount];
columnTypes[0] = java.sql.Types.VARCHAR;
columnTypeNames = initArrayList(colCount);
columnTypeNames.add("String");
} else if (type == ResultSet.GET_TABLE_TYPES) {
colCount = 1;
columnNames = new ArrayList(colCount);
columnNames.add("TABLE_TYPE");
columnTypes = new int[colCount];
columnTypes[0] = java.sql.Types.VARCHAR;
columnTypeNames = initArrayList(colCount);
columnTypeNames.add("String");
} else if (type == ResultSet.GET_EMPTY_RESULT) {
colCount = 1;
columnNames = new ArrayList(colCount);
columnNames.add("UNSUPPORTED");
columnTypes = new int[colCount];
columnTypes[0] = java.sql.Types.VARCHAR;
columnTypeNames = initArrayList(colCount);
columnTypeNames.add("String");
} else if (type == ResultSet.GET_IMPORTED_KEYS) {
colCount = 14;
columnNames = new ArrayList(colCount);
columnNames.add("PKTABLE_CAT");
columnNames.add("PKTABLE_SCHEM");
columnNames.add("PKTABLE_NAME");
columnNames.add("PKCOLUMN_NAME");
columnNames.add("FKTABLE_CAT");
columnNames.add("FKTABLE_SCHEM");
columnNames.add("FKTABLE_NAME");
columnNames.add("FKCOLUMN_NAME");
columnNames.add("KEY_SEQ");
columnNames.add("UPDATE_RULE");
columnNames.add("DELETE_RULE");
columnNames.add("FK_NAME");
columnNames.add("PK_NAME");
columnNames.add("DEFERRABILITY");
columnTypes = new int[colCount];
columnTypes[0] = java.sql.Types.VARCHAR;
columnTypes[1] = java.sql.Types.VARCHAR;
columnTypes[2] = java.sql.Types.VARCHAR;
columnTypes[3] = java.sql.Types.VARCHAR;
columnTypes[4] = java.sql.Types.VARCHAR;
columnTypes[5] = java.sql.Types.VARCHAR;
columnTypes[6] = java.sql.Types.VARCHAR;
columnTypes[7] = java.sql.Types.VARCHAR;
columnTypes[8] = java.sql.Types.INTEGER;
columnTypes[9] = java.sql.Types.INTEGER;
columnTypes[10] = java.sql.Types.INTEGER;
columnTypes[11] = java.sql.Types.VARCHAR;
columnTypes[12] = java.sql.Types.VARCHAR;
columnTypes[13] = java.sql.Types.INTEGER;
columnTypeNames = initArrayList(colCount);
columnTypeNames.add("String");
columnTypeNames.add("String");
columnTypeNames.add("String");
columnTypeNames.add("String");
columnTypeNames.add("String");
columnTypeNames.add("String");
columnTypeNames.add("String");
columnTypeNames.add("String");
columnTypeNames.add("short");
columnTypeNames.add("short");
columnTypeNames.add("short");
columnTypeNames.add("String");
columnTypeNames.add("String");
columnTypeNames.add("short");
} else if (type == ResultSet.GET_EXPORTED_KEYS) {
colCount = 14;
columnNames = new ArrayList(colCount);
columnNames.add("PKTABLE_CAT");
columnNames.add("PKTABLE_SCHEM");
columnNames.add("PKTABLE_NAME");
columnNames.add("PKCOLUMN_NAME");
columnNames.add("FKTABLE_CAT");
columnNames.add("FKTABLE_SCHEM");
columnNames.add("FKTABLE_NAME");
columnNames.add("FKCOLUMN_NAME");
columnNames.add("KEY_SEQ");
columnNames.add("UPDATE_RULE");
columnNames.add("DELETE_RULE");
columnNames.add("FK_NAME");
columnNames.add("PK_NAME");
columnNames.add("DEFERRABILITY");
columnTypes = new int[colCount];
columnTypes[0] = java.sql.Types.VARCHAR;
columnTypes[1] = java.sql.Types.VARCHAR;
columnTypes[2] = java.sql.Types.VARCHAR;
columnTypes[3] = java.sql.Types.VARCHAR;
columnTypes[4] = java.sql.Types.VARCHAR;
columnTypes[5] = java.sql.Types.VARCHAR;
columnTypes[6] = java.sql.Types.VARCHAR;
columnTypes[7] = java.sql.Types.VARCHAR;
columnTypes[8] = java.sql.Types.INTEGER;
columnTypes[9] = java.sql.Types.INTEGER;
columnTypes[10] = java.sql.Types.INTEGER;
columnTypes[11] = java.sql.Types.VARCHAR;
columnTypes[12] = java.sql.Types.VARCHAR;
columnTypes[13] = java.sql.Types.INTEGER;
columnTypeNames = initArrayList(colCount);
columnTypeNames.add("String");
columnTypeNames.add("String");
columnTypeNames.add("String");
columnTypeNames.add("String");
columnTypeNames.add("String");
columnTypeNames.add("String");
columnTypeNames.add("String");
columnTypeNames.add("String");
columnTypeNames.add("short");
columnTypeNames.add("short");
columnTypeNames.add("short");
columnTypeNames.add("String");
columnTypeNames.add("String");
columnTypeNames.add("short");
} else if (type == ResultSet.GET_PRIMARY_KEYS) {
colCount = 6;
columnNames = new ArrayList(colCount);
columnNames.add("TABLE_CAT");
columnNames.add("TABLE_SCHEM");
columnNames.add("TABLE_NAME");
columnNames.add("COLUMN_NAME");
columnNames.add("KEY_SEQ");
columnNames.add("PK_NAME");
columnTypes = new int[colCount];
columnTypes[0] = java.sql.Types.VARCHAR;
columnTypes[1] = java.sql.Types.VARCHAR;
columnTypes[2] = java.sql.Types.VARCHAR;
columnTypes[3] = java.sql.Types.VARCHAR;
columnTypes[4] = java.sql.Types.INTEGER;
columnTypes[5] = java.sql.Types.VARCHAR;
columnTypeNames = initArrayList(colCount);
columnTypeNames.add("String");
columnTypeNames.add("String");
columnTypeNames.add("String");
columnTypeNames.add("String");
columnTypeNames.add("short");
columnTypeNames.add("String");
}
columnLabels = new ArrayList(colCount);
columnLabels.addAll(columnNames);
columnClassNames = initArrayList(colCount);
columnDisplaySizes = new int[colCount];
schemaNames = initArrayList(colCount);
catalogNames = initArrayList(colCount);
precisions = new int[colCount];
scales = new int[colCount];
properties = new int[colCount];
tableNames = initArrayList(colCount);
nullables = new int[colCount];
}
/**
* Constructor
*
* @param names Column names
* @param types Column data types
* @throws SQLException
*/
public ResultSetMetaData(String[] names, int[] types) throws SQLException {
JDBCUtil.log("ResultSetMetaData-2");
colCount = names.length;
columnNames = new ArrayList(colCount);
columnTypes = types;
columnTypeNames = new ArrayList(colCount);
columnLabels = new ArrayList(colCount);
columnClassNames = new ArrayList(colCount);
columnDisplaySizes = new int[colCount];
schemaNames = new ArrayList(colCount);
catalogNames = new ArrayList(colCount);
precisions = new int[colCount];
scales = new int[colCount];
properties = new int[colCount];
tableNames = new ArrayList(colCount);
nullables = new int[colCount];
for (int i = 0; i < names.length; i++) {
columnNames.add(names[i]);
columnLabels.add(names[i]);
}
}
/**
* Returns the number of columns in this ResultSet object.
*
* @return the number of columns
*/
public int getColumnCount() throws SQLException {
JDBCUtil.log("ResultSetMetaData-4");
return colCount;
}
/**
* Indicates whether the designated column is automatically numbered.
*
* @param column the first column is 1, the second is 2, ...
* @return true if so; false otherwise
*/
public boolean isAutoIncrement(int column) throws SQLException {
JDBCUtil.log("ResultSetMetaData-5");
return (properties[column - 1] & (1 << AUTO_INCREMENT)) != 0;
}
/**
* Indicates whether a column's case matters.
*
* @param column the first column is 1, the second is 2, ...
*
* @return true if so; false otherwise
*/
public boolean isCaseSensitive(int column) throws SQLException {
JDBCUtil.log("ResultSetMetaData-6");
return (properties[column - 1] & (1 << CASE_SENSITIVE)) != 0;
}
/**
* Indicates whether the designated column can be used in a where clause.
*
*
* @param column the first column is 1, the second is 2, ...
*
* @return true if so; false otherwise
*/
public boolean isSearchable(int column) throws SQLException {
JDBCUtil.log("ResultSetMetaData-7");
return (properties[column - 1] & (1 << SEARCHABLE)) != 0;
}
/**
* Indicates whether the designated column is a cash value.
*
*
*
* @param column the first column is 1, the second is 2, ...
*
* @return true if so; false otherwise
*/
public boolean isCurrency(int column) throws SQLException {
JDBCUtil.log("ResultSetMetaData-8");
return (properties[column - 1] & (1 << CURRENCY)) != 0;
}
/**
* Indicates the nullability of values in the designated column.
*
* @param column the first column is 1, the second is 2, ...
*
* @return true if so; false otherwise
*/
public int isNullable(int column) throws SQLException {
JDBCUtil.log("ResultSetMetaData-9");
return nullables[column - 1];
}
/**
* Indicates whether values in the designated column are signed numbers.
*
* @param column the first column is 1, the second is 2, ...
*
* @return true if so; false otherwise
*/
public boolean isSigned(int column) throws SQLException {
JDBCUtil.log("ResultSetMetaData-10");
return (properties[column - 1] & (1 << SIGNED)) != 0;
}
/**
* Indicates the designated column's normal maximum width in characters.
*
* @param column the first column is 1, the second is 2, ...
*
* @return the normal maximum number of characters allowed as the width of the
* designated column
*/
public int getColumnDisplaySize(int column) throws SQLException {
JDBCUtil.log("ResultSetMetaData-11");
return 10000;
}
/**
* Gets the designated column's suggested title for use in printouts and
* displays. The suggested title is usually specified by the SQL AS clause. If a
* SQL AS is not specified, the value returned from getColumnLabel will be the
* same as the value returned by the getColumnName method.
*
* @param column the first column is 1, the second is 2, ...
*
* @return the suggested column title
*/
public String getColumnLabel(int column) throws SQLException {
JDBCUtil.log("ResultSetMetaData-12");
if (columnLabels == null || columnLabels.size() <= column - 1)
return null;
Object o = columnLabels.get(column - 1);
return o == null ? null : o.toString();
}
/**
* Get the designated column's name.
*
* @param column the first column is 1, the second is 2, ...
*
* @return column name
*/
public String getColumnName(int column) throws SQLException {
JDBCUtil.log("ResultSetMetaData-13");
if (columnNames == null || columnNames.size() <= column - 1)
return null;
Object o = columnNames.get(column - 1);
return o == null ? null : o.toString();
}
/**
* Get the designated column's table's schema.
*
*
* @param column the first column is 1, the second is 2, ...
*
* @return schema name or "" if not applicable
*/
public String getSchemaName(int column) throws SQLException {
JDBCUtil.log("ResultSetMetaData-14");
return "";
}
/**
* Get the designated column's specified column size. For numeric data, this is
* the maximum precision. For character data, this is the length in characters.
* For datetime datatypes, this is the length in characters of the String
* representation (assuming the maximum allowed precision of the fractional
* seconds component). For binary data, this is the length in bytes. For the
* ROWID datatype, this is the length in bytes. 0 is returned for data types
* where the column size is not applicable.
*
* @param column the first column is 1, the second is 2, ...
*
* @return precision
*/
public int getPrecision(int column) throws SQLException {
JDBCUtil.log("ResultSetMetaData-15");
if (precisions == null || precisions.length <= column - 1)
return 0;
return precisions[column - 1];
}
/**
* Gets the designated column's number of digits to right of the decimal point.
* 0 is returned for data types where the scale is not applicable.
*
* @param column the first column is 1, the second is 2, ...
*
* @return scale
*/
public int getScale(int column) throws SQLException {
JDBCUtil.log("ResultSetMetaData-16");
if (scales == null || scales.length <= column - 1)
return 0;
JDBCUtil.log("ResultSetMetaData-16" + scales[column - 1]);
return scales[column - 1];
}
/**
* Gets the designated column's table name.
*
* @param column the first column is 1, the second is 2, ...
*
* @return table name or "" if not applicable
*/
public String getTableName(int column) throws SQLException {
JDBCUtil.log("ResultSetMetaData-17");
if (tableNames == null || tableNames.size() <= column - 1)
return null;
Object o = tableNames.get(column - 1);
return o == null ? null : o.toString();
}
/**
* Gets the designated column's table's catalog name.
*
* @param column the first column is 1, the second is 2, ...
*
* @return the name of the catalog for the table in which the given column
* appears or "" if not applicable
*/
public String getCatalogName(int column) throws SQLException {
JDBCUtil.log("ResultSetMetaData-18");
if (catalogNames == null || catalogNames.size() <= column - 1)
return null;
Object o = catalogNames.get(column - 1);
return o == null ? null : o.toString();
}
/**
* Retrieves the designated column's SQL type.
*
*
* @param column the first column is 1, the second is 2, ...
*
* @return SQL type from java.sql.Types
*/
public int getColumnType(int column) throws SQLException {
JDBCUtil.log("ResultSetMetaData-19");
if (columnTypes == null || columnTypes.length <= column - 1)
return Types.VARCHAR;
JDBCUtil.log("ResultSetMetaData-19-type[" + columnTypes[column - 1]
+ "]");
return columnTypes[column - 1] == 0 ? Types.VARCHAR
: columnTypes[column - 1];
}
/**
* Retrieves the designated column's database-specific type name.
*
* @param column the first column is 1, the second is 2, ...
*
* @return type name used by the database. If the column type is a user-defined
* type, then a fully-qualified type name is returned.
*/
public String getColumnTypeName(int column) throws SQLException {
JDBCUtil.log("ResultSetMetaData-20");
if (columnTypeNames == null || columnTypeNames.size() <= column - 1)
return null;
Object o = columnTypeNames.get(column - 1);
return o == null ? null : o.toString();
}
/**
* Indicates whether the designated column is definitely not writable.
*
* @param column the first column is 1, the second is 2, ...
*
* @return true if so; false otherwise
*/
public boolean isReadOnly(int column) throws SQLException {
JDBCUtil.log("ResultSetMetaData-21");
return (properties[column - 1] & (1 << READ_ONLY)) != 0;
}
/**
* Indicates whether it is possible for a write on the designated column to
* succeed.
*
* @param column the first column is 1, the second is 2, ...
*
* @return true if so; false otherwise
*/
public boolean isWritable(int column) throws SQLException {
JDBCUtil.log("ResultSetMetaData-22");
return (properties[column - 1] & (1 << WRITABLE)) != 0;
}
/**
* Indicates whether a write on the designated column will definitely succeed.
*
* @param column the first column is 1, the second is 2, ...
*
* @return true if so; false otherwise
*/
public boolean isDefinitelyWritable(int column) throws SQLException {
JDBCUtil.log("ResultSetMetaData-23");
return (properties[column - 1] & (1 << DEFINITELY_WRITABLE)) != 0;
}
/**
* Returns the fully-qualified name of the Java class whose instances are
* manufactured if the method ResultSet.getObject is called to retrieve a value
* from the column. ResultSet.getObject may return a subclass of the class
* returned by this method.
*
*
* @param column the first column is 1, the second is 2, ...
*
* @return the fully-qualified name of the class in the Java programming
* language that would be used by the method ResultSet.getObject to
* retrieve the value in the specified column. This is the class name
* used for custom mapping.
*/
public String getColumnClassName(int column) throws SQLException {
JDBCUtil.log("ResultSetMetaData-24");
if (columnClassNames == null || columnClassNames.size() <= column - 1)
return null;
Object o = columnClassNames.get(column - 1);
return o == null ? null : o.toString();
}
/**
* Returns true if this either implements the interface argument or is directly
* or indirectly a wrapper for an object that does. Returns false otherwise. If
* this implements the interface then return true, else if this is a wrapper
* then return the result of recursively calling isWrapperFor on the wrapped
* object. If this does not implement the interface and is not a wrapper, return
* false. This method should be implemented as a low-cost operation compared to
* unwrap so that callers can use this method to avoid expensive unwrap calls
* that may fail. If this method returns true then calling unwrap with the same
* argument should succeed.
*
* @param iface a Class defining an interface.
*
* @return true if this implements the interface or directly or indirectly wraps
* an object that does.
*/
public boolean isWrapperFor(Class iface) throws SQLException {
JDBCUtil.log("ResultSetMetaData-27");
return false;
}
/**
* Returns an object that implements the given interface to allow access to
* non-standard methods, or standard methods not exposed by the proxy. If the
* receiver implements the interface then the result is the receiver or a proxy
* for the receiver. If the receiver is a wrapper and the wrapped object
* implements the interface then the result is the wrapped object or a proxy for
* the wrapped object. Otherwise return the the result of calling unwrap
* recursively on the wrapped object or a proxy for that result. If the receiver
* is not a wrapper and does not implement the interface, then an SQLException
* is thrown.
*
* @param iface A Class defining an interface that the result must implement.
*
* @return an object that implements the interface. May be a proxy for the
* actual implementing object.
*/
public T unwrap(Class iface) throws SQLException {
JDBCUtil.log("ResultSetMetaData-28");
return null;
}
/**
* Realize the serialization function of Externalizable interface
*/
public void readExternal(ObjectInput in) throws IOException,
ClassNotFoundException {
JDBCUtil.log("ResultSetMetaData-25");
in.readByte();
colCount = in.readInt();
columnNames = JDBCUtil.readArrayList(in);
columnTypes = (int[]) in.readObject();
columnTypeNames = JDBCUtil.readArrayList(in);
columnLabels = JDBCUtil.readArrayList(in);
columnClassNames = JDBCUtil.readArrayList(in);
columnDisplaySizes = (int[]) in.readObject();
schemaNames = JDBCUtil.readArrayList(in);
catalogNames = JDBCUtil.readArrayList(in);
precisions = (int[]) in.readObject();
scales = (int[]) in.readObject();
tableNames = JDBCUtil.readArrayList(in);
properties = (int[]) in.readObject();
nullables = (int[]) in.readObject();
JDBCUtil.log("ResultSetMetaData-25-end");
}
/**
* Realize the serialization function of Externalizable interface
*/
public void writeExternal(ObjectOutput out) throws IOException {
JDBCUtil.log("ResultSetMetaData-26");
out.writeByte(1);
out.writeInt(colCount);
JDBCUtil.writeArrayList(out, columnNames);
out.writeObject(columnTypes);
JDBCUtil.writeArrayList(out, columnTypeNames);
JDBCUtil.writeArrayList(out, columnLabels);
JDBCUtil.writeArrayList(out, columnClassNames);
out.writeObject(columnDisplaySizes);
JDBCUtil.writeArrayList(out, schemaNames);
JDBCUtil.writeArrayList(out, catalogNames);
out.writeObject(precisions);
out.writeObject(scales);
JDBCUtil.writeArrayList(out, tableNames);
out.writeObject(properties);
out.writeObject(nullables);
JDBCUtil.log("ResultSetMetaData-26-end");
}
/**
* Initialization list
*
* @param colCount Number of columns
* @return
*/
private ArrayList initArrayList(int colCount) {
ArrayList list = new ArrayList(colCount);
for (int i = 0; i < colCount; i++) {
list.add(null);
}
return list;
}
}
