propstostringgeneratorextension.java

c3p0数据库连接池实现源码

/*
 * Distributed as part of c3p0 v.0.9.1-pre6
 *
 * Copyright (C) 2005 Machinery For Change, Inc.
 *
 * Author: Steve Waldman <[e-mail]>
 *
 * This library is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License version 2.1, as 
 * published by the Free Software Foundation.
 *
 * This software 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 software; see the file LICENSE.  If not, write to the
 * Free Software Foundation, Inc., 59 Temple Place, Suite 330,
 * Boston, MA 02111-1307, USA.
 */


package com.mchange.v2.codegen.bean;

import java.util.*;

import java.io.IOException;
import com.mchange.v2.codegen.IndentedWriter;

public class PropsToStringGeneratorExtension implements GeneratorExtension 
{
    private Collection excludePropNames = null;

    public void setExcludePropertyNames( Collection excludePropNames )
    { this.excludePropNames = excludePropNames; }

    public Collection getExcludePropertyNames()
    { return excludePropNames; }

    public Collection extraGeneralImports()
    { return Collections.EMPTY_SET; }

    public Collection extraSpecificImports()
    { return Collections.EMPTY_SET; }

    public Collection extraInterfaceNames()
    { return Collections.EMPTY_SET; }

    public void generate(ClassInfo info, Class superclassType, Property[] props, Class[] propTypes, IndentedWriter iw)
	throws IOException
    {
	iw.println("public String toString()");
	iw.println("{");
	iw.upIndent();

	iw.println("StringBuffer sb = new StringBuffer();");
	iw.println("sb.append( super.toString() );");
	iw.println("sb.append(\" [ \");");

	for (int i = 0, len = props.length; i < len; ++i)
	    {
		Property prop = props[i];

		if ( excludePropNames != null && excludePropNames.contains( prop.getName() ) )
		    continue;

		iw.println("sb.append( \"" + prop.getName() + " -> \"" + " + " + prop.getName() + " );");
		if ( i != len - 1 )
		    iw.println("sb.append( \", \");");
	    }

	iw.println();
	iw.println("String extraToStringInfo = this.extraToStringInfo();");
	iw.println("if (extraToStringInfo != null)");
	iw.upIndent();
	iw.println("sb.append( extraToStringInfo );");
	iw.downIndent();


	iw.println("sb.append(\" ]\");");
	iw.println("return sb.toString();");
	iw.downIndent();
	iw.println("}");
	iw.println();
	iw.println("protected String extraToStringInfo()");
	iw.println("{ return null; }");
    }
}