org.codehaus.groovy.reflection.CachedField Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of groovy-all Show documentation
Show all versions of groovy-all Show documentation
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 org.codehaus.groovy.reflection;
import groovy.lang.GroovyRuntimeException;
import groovy.lang.MetaProperty;
import org.codehaus.groovy.runtime.typehandling.DefaultTypeTransformation;
import java.lang.reflect.Field;
import java.lang.reflect.Modifier;
public class CachedField extends MetaProperty {
public final Field field;
public CachedField(Field field) {
super (field.getName(), field.getType());
this.field = field;
}
public boolean isStatic() {
return Modifier.isStatic(getModifiers());
}
public boolean isFinal() {
return Modifier.isFinal(getModifiers());
}
public int getModifiers() {
return field.getModifiers();
}
/**
* @return the property of the given object
* @throws RuntimeException if the property could not be evaluated
*/
public Object getProperty(final Object object) {
try {
return field.get(object);
} catch (IllegalAccessException e) {
throw new GroovyRuntimeException("Cannot get the property '" + name + "'.", e);
}
}
/**
* Sets 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(final Object object, Object newValue) {
final Object goalValue = DefaultTypeTransformation.castToType(newValue, field.getType());
if (isFinal()) {
throw new GroovyRuntimeException("Cannot set the property '" + name + "' because the backing field is final.");
}
try {
field.set(object, goalValue);
} catch (IllegalAccessException ex) {
throw new GroovyRuntimeException("Cannot set the property '" + name + "'.", ex);
}
}
}