AlterViewDeParser.java

/*
 * #%L
 * JSQLParser library
 * %%
 * Copyright (C) 2004 - 2013 JSQLParser
 * %%
 * This program 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 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 Lesser Public License for more details.
 * 
 * You should have received a copy of the GNU General Lesser Public 
 * License along with this program.  If not, see
 * <http://www.gnu.org/licenses/lgpl-2.1.html>.
 * #L%
 */
package net.sf.jsqlparser.util.deparser;

import net.sf.jsqlparser.statement.create.view.AlterView;
import net.sf.jsqlparser.statement.select.PlainSelect;
import net.sf.jsqlparser.statement.select.SelectVisitor;

/**
 * A class to de-parse (that is, tranform from JSqlParser hierarchy into a string) a
 * {@link net.sf.jsqlparser.statement.create.view.AlterView}
 */
public class AlterViewDeParser {

    private StringBuilder buffer;
    private SelectVisitor selectVisitor;

    /**
     * @param buffer the buffer that will be filled with the select
     */
    public AlterViewDeParser(StringBuilder buffer) {
        SelectDeParser selectDeParser = new SelectDeParser();
        selectDeParser.setBuffer(buffer);
        ExpressionDeParser expressionDeParser = new ExpressionDeParser(selectDeParser, buffer);
        selectDeParser.setExpressionVisitor(expressionDeParser);
        selectVisitor = selectDeParser;
        this.buffer = buffer;
    }

    public AlterViewDeParser(StringBuilder buffer, SelectVisitor selectVisitor) {
        this.buffer = buffer;
        this.selectVisitor = selectVisitor;
    }

    public void deParse(AlterView alterView) {
        buffer.append("ALTER ");
        buffer.append("VIEW ").append(alterView.getView().getFullyQualifiedName());
        if (alterView.getColumnNames() != null) {
            buffer.append(PlainSelect.getStringList(alterView.getColumnNames(), true, true));
        }
        buffer.append(" AS ");

        alterView.getSelectBody().accept(selectVisitor);
    }

    public StringBuilder getBuffer() {
        return buffer;
    }

    public void setBuffer(StringBuilder buffer) {
        this.buffer = buffer;
    }
}