io.logspace.jvm.agent.shaded.mchange.v2.codegen.bean.BeanExtractingGeneratorExtension Maven / Gradle / Ivy
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/*
* Distributed as part of c3p0 v.0.9.1.1
*
* Copyright (C) 2005 Machinery For Change, Inc.
*
* Author: Steve Waldman
*
* 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 io.logspace.jvm.agent.shaded.mchange.v2.codegen.bean;
import java.util.*;
import java.lang.reflect.Modifier;
import java.io.IOException;
import io.logspace.jvm.agent.shaded.mchange.v2.codegen.CodegenUtils;
import io.logspace.jvm.agent.shaded.mchange.v2.codegen.IndentedWriter;
public class BeanExtractingGeneratorExtension implements GeneratorExtension
{
int ctor_modifiers = Modifier.PUBLIC;
int method_modifiers = Modifier.PRIVATE;
public void setConstructorModifiers( int ctor_modifiers )
{ this.ctor_modifiers = ctor_modifiers; }
public int getConstructorModifiers()
{ return ctor_modifiers; }
public void setExtractMethodModifiers( int ctor_modifiers )
{ this.method_modifiers = method_modifiers; }
public int getExtractMethodModifiers()
{ return method_modifiers; }
public Collection extraGeneralImports()
{ return Collections.EMPTY_SET; }
public Collection extraSpecificImports()
{
Set set = new HashSet();
set.add("java.beans.BeanInfo");
set.add("java.beans.PropertyDescriptor");
set.add("java.beans.Introspector");
set.add("java.beans.IntrospectionException");
set.add("java.lang.reflect.InvocationTargetException");
return 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("private static Class[] NOARGS = new Class[0];");
iw.println();
iw.print( CodegenUtils.getModifierString( method_modifiers ) );
iw.print(" void extractPropertiesFromBean( Object bean ) throws InvocationTargetException, IllegalAccessException, IntrospectionException");
iw.println("{");
iw.upIndent();
iw.println("BeanInfo bi = Introspector.getBeanInfo( bean.getClass() );");
iw.println("PropertyDescriptor[] pds = bi.getPropertyDescriptors();");
iw.println("for (int i = 0, len = pds.length; i < len; ++i)");
iw.println("{");
iw.upIndent();
for (int i = 0, len = props.length; i < len; ++i)
{
iw.println("if (\"" + props[i].getName() + "\".equals( pds[i].getName() ) )");
iw.upIndent();
iw.println("this." + props[i].getName() + " = " + extractorExpr( props[i], propTypes[i] ) + ';');
iw.downIndent();
}
iw.println("}"); //for loop
iw.downIndent();
iw.println("}"); //method
iw.println();
iw.print( CodegenUtils.getModifierString( ctor_modifiers ) );
iw.println(' ' + info.getClassName() + "( Object bean ) throws InvocationTargetException, IllegalAccessException, IntrospectionException");
iw.println("{");
iw.upIndent();
iw.println("extractPropertiesFromBean( bean );");
iw.downIndent();
iw.println("}");
}
private String extractorExpr( Property prop, Class propType )
{
if ( propType.isPrimitive() )
{
String castType = BeangenUtils.capitalize( prop.getSimpleTypeName() );
String valueMethod = prop.getSimpleTypeName() + "Value()";
if ( propType == char.class)
castType = "Character";
else if ( propType == int.class)
castType = "Integer";
return "((" + castType + ") pds[i].getReadMethod().invoke( bean, NOARGS ))." + valueMethod;
}
else
return "(" + prop.getSimpleTypeName() + ") pds[i].getReadMethod().invoke( bean, NOARGS )";
}
}