/**
* SqlJetTableForeignKey.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 java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import org.antlr.runtime.tree.CommonTree;
import org.tmatesoft.sqljet.core.schema.ISqlJetForeignKey;
import org.tmatesoft.sqljet.core.schema.ISqlJetTableForeignKey;
/**
* @author TMate Software Ltd.
* @author Dmitry Stadnik (dtrace@seznam.cz)
*/
public class SqlJetTableForeignKey extends SqlJetTableConstraint implements ISqlJetTableForeignKey {
private final List<String> columnNames;
private final ISqlJetForeignKey foreignKey;
public SqlJetTableForeignKey(String name, CommonTree ast) {
super(name);
assert "foreign".equalsIgnoreCase(ast.getText());
CommonTree columnsNode = (CommonTree) ast.getChild(1);
assert "columns".equalsIgnoreCase(columnsNode.getText()) || "references".equalsIgnoreCase(columnsNode.getText());
List<String> columnNames = new ArrayList<String>();
for (int i = 0; i < columnsNode.getChildCount(); i++) {
columnNames.add(columnsNode.getChild(i).getText());
}
this.columnNames = Collections.unmodifiableList(columnNames);
foreignKey = new SqlJetForeignKey((CommonTree) ast.getChild(1));
}
public List<String> getColumnNames() {
return columnNames;
}
public ISqlJetForeignKey getForeignKey() {
return foreignKey;
}
@Override
public String toString() {
StringBuffer buffer = new StringBuffer();
buffer.append(super.toString());
if (buffer.length() > 0) {
buffer.append(' ');
}
buffer.append("FOREIGN KEY (");
for (int i = 0; i < getColumnNames().size(); i++) {
if (i > 0) {
buffer.append(", ");
}
buffer.append(getColumnNames().get(i));
}
buffer.append(") ");
buffer.append(foreignKey);
return buffer.toString();
}
}