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Groovy: A powerful, dynamic language for the JVM
/*
* Copyright 2003-2007 the original author or authors.
*
* 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 groovy.lang;
import org.codehaus.groovy.reflection.CachedField;
import org.codehaus.groovy.runtime.MetaClassHelper;
import org.codehaus.groovy.runtime.typehandling.DefaultTypeTransformation;
import java.lang.reflect.Modifier;
/**
* Represents a property on a bean which may have a getter and/or a setter
*
* @author James Strachan
* @author Pilho Kim
* @version $Revision: 9750 $
*/
public class MetaBeanProperty extends MetaProperty {
private MetaMethod getter;
private MetaMethod setter;
private CachedField field;
public MetaBeanProperty(String name, Class type, MetaMethod getter, MetaMethod setter) {
super(name, type);
this.getter = getter;
this.setter = setter;
}
/**
* Get the property of the given object.
*
* @param object which to be got
* @return the property of the given object
* @throws Exception if the property could not be evaluated
*/
public Object getProperty(Object object) {
if (getter == null) {
//TODO: we probably need a WriteOnlyException class
throw new GroovyRuntimeException("Cannot read write-only property: " + name);
}
return getter.invoke(object, MetaClassHelper.EMPTY_ARRAY);
}
/**
* Set the property on the given object to the new value.
*
* @param object on which to set the property
* @param newValue the new value of the property
* @throws RuntimeException if the property could not be set
*/
public void setProperty(Object object, Object newValue) {
if (setter == null) {
throw new GroovyRuntimeException("Cannot set read-only property: " + name);
}
newValue = DefaultTypeTransformation.castToType(newValue, getType());
setter.invoke(object, new Object[]{newValue});
}
/**
* Get the getter method.
*/
public MetaMethod getGetter() {
return getter;
}
/**
* Get the setter method.
*/
public MetaMethod getSetter() {
return setter;
}
/**
* This is for MetaClass to patch up the object later when looking for get*() methods.
*/
void setGetter(MetaMethod getter) {
this.getter = getter;
}
/**
* This is for MetaClass to patch up the object later when looking for set*() methods.
*/
void setSetter(MetaMethod setter) {
this.setter = setter;
}
public int getModifiers() {
if (setter != null && getter == null) return setter.getModifiers();
if (getter != null && setter == null) return getter.getModifiers();
int modifiers = getter.getModifiers() | setter.getModifiers();
int visibility = 0;
if (Modifier.isPublic(modifiers)) visibility = Modifier.PUBLIC;
if (Modifier.isProtected(modifiers)) visibility = Modifier.PROTECTED;
if (Modifier.isPrivate(modifiers)) visibility = Modifier.PRIVATE;
int states = getter.getModifiers() & setter.getModifiers();
states &= ~(Modifier.PUBLIC | Modifier.PROTECTED | Modifier.PRIVATE);
states |= visibility;
return states;
}
public void setField(CachedField f) {
this.field = f;
}
public CachedField getField() {
return field;
}
}