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/**
 * Copyright (c) 1997-2013, www.tinygroup.org ([email protected]).
 * 
 * Licensed under the GPL, Version 3.0 (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.gnu.org/licenses/gpl.html
 * 
 * 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.tinygroup.tinysqldsl.expression;

import org.tinygroup.tinysqldsl.base.StatementSqlBuilder;

public class OracleHierarchicalExpression implements Expression {

    private Expression startExpression;
    private Expression connectExpression;
    private boolean noCycle = false;

    public OracleHierarchicalExpression() {
        super();
    }

    public OracleHierarchicalExpression(Expression startExpression,
                                        Expression connectExpression, boolean noCycle) {
        super();
        this.startExpression = startExpression;
        this.connectExpression = connectExpression;
        this.noCycle = noCycle;
    }

    public Expression getStartExpression() {
        return startExpression;
    }

    public void setStartExpression(Expression startExpression) {
        this.startExpression = startExpression;
    }

    public Expression getConnectExpression() {
        return connectExpression;
    }

    public void setConnectExpression(Expression connectExpression) {
        this.connectExpression = connectExpression;
    }

    public boolean isNoCycle() {
        return noCycle;
    }

    public void setNoCycle(boolean noCycle) {
        this.noCycle = noCycle;
    }

    public String toString() {
        StringBuilder b = new StringBuilder();
        if (startExpression != null) {
            b.append(" START WITH ").append(startExpression.toString());
        }
        b.append(" CONNECT BY ");
        if (isNoCycle()) {
            b.append("NOCYCLE ");
        }
        b.append(connectExpression.toString());
        return b.toString();
    }

    public void builderExpression(StatementSqlBuilder builder) {
        builder.appendSql(toString());
    }
}