/**
* SqlJetMatchExpression.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.SqlJetException;
import org.tmatesoft.sqljet.core.schema.ISqlJetExpression;
import org.tmatesoft.sqljet.core.schema.ISqlJetMatchExpression;
/**
* @author TMate Software Ltd.
* @author Dmitry Stadnik (dtrace@seznam.cz)
*/
public class SqlJetMatchExpression extends SqlJetExpression implements ISqlJetMatchExpression {
private final Operation operation;
private final boolean not;
private final ISqlJetExpression expression, matchExpression, escapeExpression;
public SqlJetMatchExpression(CommonTree ast) throws SqlJetException {
operation = Operation.decode(ast.getText());
assert operation != null;
matchExpression = create((CommonTree) ast.getChild(0));
boolean not = false;
ISqlJetExpression expression = null, escapeExpression = null;
for (int i = 1; i < ast.getChildCount(); i++) {
CommonTree child = (CommonTree) ast.getChild(1);
if ("not".equalsIgnoreCase(child.getText())) {
not = true;
} else if ("escape".equalsIgnoreCase(child.getText())) {
escapeExpression = create((CommonTree) child.getChild(0));
} else {
escapeExpression = create(child);
}
}
assert expression != null;
this.not = not;
this.expression = expression;
this.escapeExpression = escapeExpression;
}
public ISqlJetExpression getExpression() {
return expression;
}
public Operation getOperation() {
return operation;
}
public boolean isNot() {
return not;
}
public ISqlJetExpression getMatchExpression() {
return matchExpression;
}
public ISqlJetExpression getEscapeExpression() {
return escapeExpression;
}
@Override
public String toString() {
StringBuffer buffer = new StringBuffer();
buffer.append(getExpression());
if (isNot()) {
buffer.append(" NOT");
}
buffer.append(' ');
buffer.append(getOperation());
buffer.append(' ');
buffer.append(getMatchExpression());
if (getEscapeExpression() != null) {
buffer.append(" ESCAPE ");
buffer.append(getEscapeExpression());
}
return buffer.toString();
}
}