/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.jena.jdbc.results.metadata;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.sql.SQLException;
import java.sql.SQLFeatureNotSupportedException;
import java.util.ArrayList;
import java.util.List;
import org.apache.jena.jdbc.results.metadata.columns.ColumnInfo;
/**
* Abstract implementation of JDBC result set metadata
*
*/
public class AbstractResultsMetadata implements ResultSetMetaData {
protected ResultSet results;
protected List<ColumnInfo> columns = new ArrayList<ColumnInfo>();
/**
* Abstract implementation of result set metadata
*
* @param results
* Result Set
* @param columns
* Column information
* @throws SQLException
* Thrown if metadata cannot be created
*/
public AbstractResultsMetadata(ResultSet results, ColumnInfo[] columns) throws SQLException {
if (results == null)
throw new SQLException("Result Set cannot be null");
this.results = results;
for (ColumnInfo column : columns) {
this.columns.add(column);
}
}
@Override
public boolean isWrapperFor(Class<?> iface) throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public <T> T unwrap(Class<T> iface) throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public String getCatalogName(int column) throws SQLException {
if (this.results != null) {
return this.results.getStatement().getConnection().getCatalog();
} else {
return "";
}
}
protected final ColumnInfo getColumnInfo(int column) throws SQLException {
// Remember JDBC columns use a 1 based index
if (column >= 1 && column <= this.columns.size()) {
return this.columns.get(column - 1);
} else {
throw new SQLException("Column Index is out of bounds");
}
}
@Override
public String getColumnClassName(int column) throws SQLException {
return this.getColumnInfo(column).getClassName();
}
@Override
public int getColumnCount() {
return this.columns.size();
}
/**
* Gets a columns display size
* <p>
* Since RDF imposes no maximum on the size of a term this may be
* arbitrarily large hence {@link Integer#MAX_VALUE} is returned, users
* should not rely on this method to give them accurate information for UI
* usage.
* </p>
*/
@Override
public int getColumnDisplaySize(int column) throws SQLException {
return this.getColumnInfo(column).getDisplaySize();
}
@Override
public String getColumnName(int column) throws SQLException {
return this.getColumnInfo(column).getLabel();
}
@Override
public String getColumnLabel(int column) throws SQLException {
return this.getColumnInfo(column).getLabel();
}
@Override
public int getColumnType(int column) throws SQLException {
return this.getColumnInfo(column).getType();
}
@Override
public String getColumnTypeName(int column) throws SQLException {
return this.getColumnInfo(column).getTypeName();
}
@Override
public int getPrecision(int column) throws SQLException {
return this.getColumnInfo(column).getPrecision();
}
@Override
public int getScale(int column) throws SQLException {
return this.getColumnInfo(column).getScale();
}
@Override
public String getSchemaName(int column) {
// Not applicable so return empty string
return "";
}
@Override
public String getTableName(int column) {
// Not applicable so return empty string
return "";
}
@Override
public boolean isAutoIncrement(int column) throws SQLException {
return this.getColumnInfo(column).isAutoIncrement();
}
@Override
public boolean isCaseSensitive(int column) throws SQLException {
return this.getColumnInfo(column).isCaseSensitive();
}
@Override
public boolean isCurrency(int column) throws SQLException {
return this.getColumnInfo(column).isCurrency();
}
@Override
public boolean isDefinitelyWritable(int column) throws SQLException {
return this.isWritable(column);
}
@Override
public int isNullable(int column) throws SQLException {
return this.getColumnInfo(column).getNullability();
}
@Override
public boolean isReadOnly(int column) throws SQLException {
return this.getColumnInfo(column).isReadOnly();
}
@Override
public boolean isSearchable(int column) throws SQLException {
return this.getColumnInfo(column).isSearchable();
}
@Override
public boolean isSigned(int column) throws SQLException {
return this.getColumnInfo(column).isSigned();
}
@Override
public boolean isWritable(int column) throws SQLException {
return this.getColumnInfo(column).isWritable();
}
/**
* Gets a copy of the raw underlying column information
*
* @return Column Information
*/
public List<ColumnInfo> getJenaColumnInfo() {
return new ArrayList<ColumnInfo>(this.columns);
}
}