/**
* SqlJetColumnExpression.java
* Copyright (C) 2009-2010 TMate Software Ltd
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
package org.tmatesoft.sqljet.core.internal.schema;
import org.antlr.runtime.tree.CommonTree;
import org.tmatesoft.sqljet.core.schema.ISqlJetColumnExpression;
/**
* @author TMate Software Ltd.
* @author Dmitry Stadnik (dtrace@seznam.cz)
*/
public class SqlJetColumnExpression extends SqlJetExpression implements ISqlJetColumnExpression {
private final String columnName, tableName, databaseName;
public SqlJetColumnExpression(CommonTree ast) {
assert "column_expression".equalsIgnoreCase(ast.getText());
CommonTree columnNode = (CommonTree) ast.getChild(0);
columnName = columnNode.getText();
if (columnNode.getChildCount() > 0) {
CommonTree tableNode = (CommonTree) columnNode.getChild(0);
tableName = tableNode.getText();
databaseName = (tableNode.getChildCount() > 0) ? tableNode.getChild(0).getText() : null;
} else {
tableName = null;
databaseName = null;
}
}
public String getColumnName() {
return columnName;
}
public String getTableName() {
return tableName;
}
public String getDatabaseName() {
return databaseName;
}
@Override
public String toString() {
StringBuffer buffer = new StringBuffer();
if (getDatabaseName() != null) {
buffer.append(getDatabaseName());
buffer.append('.');
}
if (getTableName() != null) {
buffer.append(getTableName());
buffer.append('.');
}
buffer.append(getColumnName());
return buffer.toString();
}
}