com.robotium.solo.Reflect Maven / Gradle / Ivy
package com.robotium.solo;
import java.lang.reflect.Field;
/**
* A reflection utility class.
*
* @author Per-Erik Bergman, [email protected]
*
*/
class Reflect {
private Object object;
/**
* Constructs this object
*
* @param object the object to reflect on
*/
public Reflect(Object object) {
if (object == null)
throw new IllegalArgumentException("Object can not be null.");
this.object = object;
}
/**
* Get a field from the object
*
* @param name the name of the field
*
* @return a field reference
*/
public FieldRf field(String name) {
return new FieldRf(object, name);
}
/**
* A field reference.
*/
public class FieldRf {
private Class clazz;
private Object object;
private String name;
/**
* Constructs this object
*
* @param object the object to reflect on
* @param name the name of the field
*/
public FieldRf(Object object, String name) {
this.object = object;
this.name = name;
}
/**
* Constructs this object
*
* @param outclazz the output type
*
* @return T
*/
public T out(Class outclazz) {
Field field = getField();
Object obj = getValue(field);
return outclazz.cast(obj);
}
/**
* Set a value to a field
*
* @param value the value to set
*/
public void in(Object value) {
Field field = getField();
try {
field.set(object, value);
} catch (IllegalArgumentException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
}
}
/**
* Set the class type
*
* @param clazz the type
*
* @return a field reference
*/
public FieldRf type(Class clazz) {
this.clazz = clazz;
return this;
}
private Field getField() {
if (clazz == null) {
clazz = object.getClass();
}
Field field = null;
try {
field = clazz.getDeclaredField(name);
field.setAccessible(true);
} catch (NoSuchFieldException ignored) {}
return field;
}
private Object getValue(Field field) {
if (field == null) {
return null;
}
Object obj = null;
try {
obj = field.get(object);
} catch (IllegalArgumentException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
}
return obj;
}
}
}