Java Reflection Field Set setField(Field field, Object target, Object value)

Description

set Field

License

Apache License

Declaration

public static void setField(Field field, Object target, Object value) 

Method Source Code

//package com.java2s;
//License from project: Apache License 

import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;

import java.lang.reflect.UndeclaredThrowableException;

public class Main {
    public static void setField(Field field, Object target, Object value) {
        try {/*  w w  w  .j ava  2 s .c om*/
            field.set(target, value);
        } catch (IllegalAccessException ex) {
            handleReflectionException(ex);
            throw new IllegalStateException(
                    "Unexpected reflection exception - " + ex.getClass().getName() + ": " + ex.getMessage());
        }
    }

    public static void handleReflectionException(Exception ex) {
        if (ex instanceof NoSuchMethodException) {
            throw new IllegalStateException("Method not found: " + ex.getMessage());
        }
        if (ex instanceof IllegalAccessException) {
            throw new IllegalStateException("Could not access method: " + ex.getMessage());
        }
        if (ex instanceof InvocationTargetException) {
            handleInvocationTargetException((InvocationTargetException) ex);
        }
        if (ex instanceof RuntimeException) {
            throw (RuntimeException) ex;
        }
        throw new UndeclaredThrowableException(ex);
    }

    public static void handleInvocationTargetException(InvocationTargetException ex) {
        rethrowRuntimeException(ex.getTargetException());
    }

    public static void rethrowRuntimeException(Throwable ex) {
        if (ex instanceof RuntimeException) {
            throw (RuntimeException) ex;
        }
        if (ex instanceof Error) {
            throw (Error) ex;
        }
        throw new UndeclaredThrowableException(ex);
    }
}

Related

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2. setField(Field field, Object target, Object value)
3. setField(Field field, Object target, Object value)
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5. setField(Field field, Object target, Object value)
6. setField(Field field, T newValue, Object instance)
7. setField(Field field, U instance, Object value)
8. setField(final Field field, final Object instance, final Object value)
9. setField(final Field field, final Object object, final Object value)