org.joda.beans.impl.light.LightMetaProperty Maven / Gradle / Ivy
/*
* Copyright 2001-2015 Stephen Colebourne
*
* 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.joda.beans.impl.light;
import java.lang.annotation.Annotation;
import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.lang.reflect.Type;
import java.util.Arrays;
import java.util.List;
import org.joda.beans.Bean;
import org.joda.beans.MetaBean;
import org.joda.beans.Property;
import org.joda.beans.PropertyStyle;
import org.joda.beans.impl.BasicMetaProperty;
import org.joda.beans.impl.BasicProperty;
/**
* An immutable meta-property based on a getter interface.
*
* The {@link PropertyGetter} interface is used to query the target.
*
* @param
the type of the property content
* @author Stephen Colebourne
*/
final class LightMetaProperty
extends BasicMetaProperty
{
/** The meta-bean. */
private final MetaBean metaBean;
/** The type of the property. */
private final Class
propertyType;
/** The type of the property. */
private final Type propertyGenericType;
/** The annotations. */
private final List annotations;
/** The read method. */
private final PropertyGetter getter;
/** The index of the property in the constructor. */
private final int constructorIndex;
//-----------------------------------------------------------------------
/**
* Creates an instance from a {@code Field}.
*
* @param the property type
* @param metaBean the meta bean, not null
* @param field the field, not null
* @param constructorIndex the index of the property in the constructor
* @return the property, not null
*/
@SuppressWarnings("unchecked")
static
LightMetaProperty
of(
MetaBean metaBean,
final Field field,
final String propertyName,
int constructorIndex) {
PropertyGetter getter = new PropertyGetter() {
@Override
public Object get(Bean bean) {
try {
return field.get(bean);
} catch (IllegalArgumentException ex) {
throw new UnsupportedOperationException("Property cannot be read: " + propertyName, ex);
} catch (IllegalAccessException ex) {
throw new UnsupportedOperationException("Property cannot be read: " + propertyName, ex);
}
}
};
return new LightMetaProperty
(
metaBean,
propertyName,
(Class
) field.getType(),
field.getGenericType(),
Arrays.asList(field.getAnnotations()),
getter,
constructorIndex);
}
/**
* Creates an instance from a {@code Method}.
*
* @param
the property type
* @param metaBean the meta bean, not null
* @param method the method, not null
* @param constructorIndex the index of the property in the constructor
* @return the property, not null
*/
@SuppressWarnings("unchecked")
static
LightMetaProperty
of(
MetaBean metaBean,
Field field,
final Method method,
final String propertyName,
int constructorIndex) {
PropertyGetter getter = new PropertyGetter() {
@Override
public Object get(Bean bean) {
try {
return method.invoke(bean);
} catch (IllegalArgumentException ex) {
throw new UnsupportedOperationException("Property cannot be read: " + propertyName, ex);
} catch (IllegalAccessException ex) {
throw new UnsupportedOperationException("Property cannot be read: " + propertyName, ex);
} catch (InvocationTargetException ex) {
if (ex.getCause() instanceof RuntimeException) {
throw (RuntimeException) ex.getCause();
}
throw new RuntimeException(ex);
}
}
};
return new LightMetaProperty
(
metaBean,
propertyName,
(Class
) field.getType(),
field.getGenericType(),
Arrays.asList(field.getAnnotations()),
getter,
constructorIndex);
}
/**
* Creates an instance.
*
* @param
the property type
* @param metaBean the meta bean, not null
* @param propertyName the property name, not empty
* @param propertyType the property type
* @param propertyGenericType the property generic type
* @param annotations the annotations
* @param getter the property getter
* @param constructorIndex the index of the property in the constructor
* @return the property, not null
*/
LightMetaProperty(
MetaBean metaBean,
String propertyName,
Class
propertyType,
Type propertyGenericType,
List annotations,
PropertyGetter getter,
int constructorIndex) {
super(propertyName);
this.metaBean = metaBean;
this.propertyType = propertyType;
this.propertyGenericType = propertyGenericType;
this.annotations = annotations;
this.getter = getter;
this.constructorIndex = constructorIndex;
}
//-----------------------------------------------------------------------
@Override
public Property createProperty(Bean bean) {
return BasicProperty.of(bean, this);
}
@Override
public MetaBean metaBean() {
return metaBean;
}
@Override
public Class declaringType() {
return metaBean.beanType();
}
@Override
public Class
propertyType() {
return propertyType;
}
@Override
public Type propertyGenericType() {
return propertyGenericType;
}
@Override
public PropertyStyle style() {
return PropertyStyle.IMMUTABLE;
}
@Override
public List annotations() {
return annotations;
}
//-----------------------------------------------------------------------
@Override
@SuppressWarnings("unchecked")
public P get(Bean bean) {
return (P) getter.get(bean);
}
@Override
public void set(Bean bean, Object value) {
throw new UnsupportedOperationException("Property cannot be written: " + name());
}
int getConstructorIndex() {
return constructorIndex;
}
}