/*
* JBoss, Home of Professional Open Source.
* See the COPYRIGHT.txt file distributed with this work for information
* regarding copyright ownership. Some portions may be licensed
* to Red Hat, Inc. under one or more contributor license agreements.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301 USA.
*/
package org.teiid.query.sql.symbol;
import org.teiid.core.util.EquivalenceUtil;
import org.teiid.core.util.HashCodeUtil;
import org.teiid.query.sql.LanguageObject;
import org.teiid.query.sql.LanguageVisitor;
import org.teiid.query.sql.visitor.SQLStringVisitor;
public class DerivedColumn implements LanguageObject {
private String alias;
private Expression expression;
private boolean propagateName = true;
public DerivedColumn(String name, Expression expression) {
this.alias = name;
this.expression = expression;
}
public boolean isPropagateName() {
return propagateName;
}
public void setPropagateName(boolean propagateName) {
this.propagateName = propagateName;
}
public String getAlias() {
return alias;
}
public Expression getExpression() {
return expression;
}
public void setAlias(String name) {
this.alias = name;
}
public void setExpression(Expression expression) {
this.expression = expression;
}
@Override
public void acceptVisitor(LanguageVisitor visitor) {
visitor.visit(this);
}
@Override
public int hashCode() {
return HashCodeUtil.hashCode(0, alias, expression);
}
@Override
public boolean equals(Object obj) {
if (obj == this) {
return true;
}
if (!(obj instanceof DerivedColumn)) {
return false;
}
DerivedColumn other = (DerivedColumn)obj;
return EquivalenceUtil.areEqual(alias, other.alias) && this.expression.equals(other.expression);
}
@Override
public DerivedColumn clone() {
DerivedColumn clone = new DerivedColumn(alias, (Expression)this.expression.clone());
clone.propagateName = propagateName;
return clone;
}
@Override
public String toString() {
return SQLStringVisitor.getSQLString(this);
}
}