/*
* Copyright 2013 (c) MuleSoft, Inc.
*
* Licensed 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.
*/
package org.raml.parser.builder;
import java.lang.annotation.Annotation;
import java.lang.reflect.Constructor;
import java.lang.reflect.InvocationTargetException;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import org.raml.parser.annotation.Key;
import org.raml.parser.annotation.Value;
import org.raml.parser.resolver.DefaultScalarTupleHandler;
import org.raml.parser.utils.ConvertUtils;
import org.raml.parser.utils.NodeUtils;
import org.raml.parser.utils.ReflectionUtils;
import org.yaml.snakeyaml.nodes.Node;
import org.yaml.snakeyaml.nodes.ScalarNode;
public class PojoTupleBuilder extends DefaultTupleBuilder<ScalarNode, Node>
{
private Class<?> pojoClass;
private String fieldName;
public PojoTupleBuilder(String fieldName, Class<?> pojoClass)
{
super(new DefaultScalarTupleHandler(fieldName));
this.fieldName = fieldName;
this.pojoClass = pojoClass;
}
public PojoTupleBuilder(Class<?> pojoClass)
{
this(null, pojoClass);
}
@Override
protected Map<String, TupleBuilder<?, ?>> getBuilders()
{
if (super.getBuilders().isEmpty())
{
addBuildersFor(pojoClass);
}
return super.getBuilders();
}
@Override
public Object buildValue(Object parent, Node node)
{
try
{
Object newValue = null;
if (pojoClass.isEnum())
{
newValue = ConvertUtils.convertTo((String) NodeUtils.getNodeValue(node), pojoClass);
}
else if (pojoClass.getDeclaredConstructors().length > 0)
{
newValue = buildValueByAnnotation(node);
}
if (newValue == null)
{
newValue = pojoClass.newInstance();
}
ReflectionUtils.setProperty(parent, fieldName, newValue);
processPojoAnnotations(newValue, fieldName, parent);
return newValue;
}
catch (InstantiationException e)
{
throw new RuntimeException(e);
}
catch (IllegalAccessException e)
{
throw new RuntimeException(e);
}
catch (InvocationTargetException e)
{
throw new RuntimeException(e);
}
}
/**
* Reflectively construct a new value object.
* Searches for a constructor that accepts @Value and @Key annotated parameters only.
* If one is not found then it falls back to a default constructor.
*/
private Object buildValueByAnnotation(Node node) throws IllegalAccessException, InvocationTargetException, InstantiationException
{
for (Constructor<?> declaredConstructor : pojoClass.getDeclaredConstructors())
{
List<Object> arguments = new ArrayList<Object>();
Annotation[][] parameterAnnotations = declaredConstructor.getParameterAnnotations();
for (Annotation[] parameterAnnotation : parameterAnnotations)
{
if (parameterAnnotation.length == 0)
{
break;
}
if (parameterAnnotation[0].annotationType().equals(Value.class))
{
arguments.add(NodeUtils.getNodeValue(node));
}
else if (parameterAnnotation[0].annotationType().equals(Key.class))
{
arguments.add(fieldName);
}
}
if (arguments.size() == declaredConstructor.getParameterTypes().length)
{
return declaredConstructor.newInstance(arguments.toArray(new Object[arguments.size()]));
}
}
return null;
}
@Override
public void buildKey(Object parent, ScalarNode node)
{
fieldName = node.getValue();
}
public String getFieldName()
{
return fieldName;
}
public Class<?> getPojoClass()
{
return pojoClass;
}
@Override
public String toString()
{
return fieldName;
}
}