package org.apache.fulcrum.intake.model;
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
*
* 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.
*/
import java.lang.reflect.Constructor;
import java.util.HashMap;
import java.util.Map;
import org.apache.fulcrum.intake.IntakeException;
import org.apache.fulcrum.intake.xmlmodel.XmlField;
/**
* Creates Field objects.
*
* @author <a href="mailto:jmcnally@collab.net">John McNally</a>
* @author <a href="mailto:quintonm@bellsouth.net">Quinton McCombs</a>
* @author <a href="mailto:Colin.Chalmers@maxware.nl">Colin Chalmers</a>
* @author <a href="mailto:tv@apache.org">Thomas Vandahl</a>
* @version $Id: FieldFactory.java 670328 2008-06-22 09:34:11Z tv $
*/
public abstract class FieldFactory
{
private static Map fieldCtors = initFieldCtors();
private static Map initFieldCtors()
{
fieldCtors = new HashMap();
fieldCtors.put("int", new FieldFactory.FieldCtor()
{
public Field getInstance(XmlField f, Group g)
throws IntakeException
{
return new IntegerField(f, g);
}
}
);
fieldCtors.put("boolean", new FieldFactory.FieldCtor()
{
public Field getInstance(XmlField f, Group g)
throws IntakeException
{
return new BooleanField(f, g);
}
}
);
fieldCtors.put("String", new FieldFactory.FieldCtor()
{
public Field getInstance(XmlField f, Group g)
throws IntakeException
{
return new StringField(f, g);
}
}
);
fieldCtors.put("BigDecimal", new FieldFactory.FieldCtor()
{
public Field getInstance(XmlField f, Group g)
throws IntakeException
{
return new BigDecimalField(f, g);
}
}
);
fieldCtors.put("FileItem", new FieldFactory.FieldCtor()
{
public Field getInstance(XmlField f, Group g)
throws IntakeException
{
return new FileItemField(f, g);
}
}
);
fieldCtors.put("DateString", new FieldFactory.FieldCtor()
{
public Field getInstance(XmlField f, Group g)
throws IntakeException
{
return new DateStringField(f, g);
}
}
);
fieldCtors.put("float", new FieldFactory.FieldCtor()
{
public Field getInstance(XmlField f, Group g)
throws IntakeException
{
return new FloatField(f, g);
}
}
);
fieldCtors.put("double", new FieldFactory.FieldCtor()
{
public Field getInstance(XmlField f, Group g)
throws IntakeException
{
return new DoubleField(f, g);
}
}
);
fieldCtors.put("short", new FieldFactory.FieldCtor()
{
public Field getInstance(XmlField f, Group g)
throws IntakeException
{
return new ShortField(f, g);
}
}
);
fieldCtors.put("long", new FieldFactory.FieldCtor()
{
public Field getInstance(XmlField f, Group g)
throws IntakeException
{
return new LongField(f, g);
}
}
);
fieldCtors.put("custom", new FieldFactory.FieldCtor()
{
public Field getInstance(XmlField f, Group g)
throws IntakeException
{
String fieldClass = f.getFieldClass();
if (fieldClass != null
&& fieldClass.indexOf('.') == -1)
{
fieldClass = Field.defaultFieldPackage + fieldClass;
}
if (fieldClass != null)
{
Class field;
try
{
field = Class.forName(fieldClass);
Constructor constructor =
field.getConstructor(new Class[] { XmlField.class, Group.class });
return (Field)constructor.newInstance(new Object[] { f, g });
}
catch (ClassNotFoundException e)
{
throw new IntakeException(
"Could not load Field class("
+ fieldClass + ")", e);
}
catch (Exception e)
{
throw new IntakeException(
"Could not create new instance of Field("
+ fieldClass + ")", e);
}
}
else
{
throw new IntakeException(
"Custom field types must define a fieldClass");
}
}
}
);
return fieldCtors;
}
protected static abstract class FieldCtor
{
public Field getInstance(XmlField f, Group g) throws IntakeException
{
return null;
}
}
/**
* Creates a Field object appropriate for the type specified
* in the xml file.
*
* @param xmlField a <code>XmlField</code> value
* @return a <code>Field</code> value
* @throws IntakeException indicates that an unknown type was specified for a field.
*/
public static final Field getInstance(XmlField xmlField, Group xmlGroup)
throws IntakeException
{
FieldCtor fieldCtor = null;
Field field = null;
String type = xmlField.getType();
fieldCtor = (FieldCtor) fieldCtors.get(type);
if (fieldCtor == null)
{
throw new IntakeException("An Unsupported type has been specified for " +
xmlField.getName() + " in group " + xmlGroup.getIntakeGroupName() + " type = " + type);
}
else
{
field = fieldCtor.getInstance(xmlField, xmlGroup);
}
return field;
}
}