Example usage for java.lang.reflect Field get

Introduction

In this page you can find the example usage for java.lang.reflect Field get.

Prototype

@CallerSensitive
@ForceInline 
public Object get(Object obj) throws IllegalArgumentException, IllegalAccessException

Source Link

Document

Returns the value of the field represented by this Field , on the specified object.

Usage

From source file:com.antonjohansson.elasticsearchshell.utils.ReflectionUtils.java

/**
 * Gets the value of a field of an object.
 *
 * @param clazz The class of the object to get field value from.
 * @param object The object to get field value from.
 * @param fieldName The name of the field to get value from.
 * @return Returns the field value./*  w  ww .  j av a 2s  . c  o  m*/
 */
@SuppressWarnings("unchecked")
public static <V, T> V getFieldValue(Class<T> clazz, T object, String fieldName) {
    Field field = FieldUtils.getField(clazz, fieldName, true);
    try {
        return (V) field.get(object);
    } catch (Exception e) {
        throw new RuntimeException(e);
    }
}

From source file:Main.java

private static String getValue(String packageName, String fieldName) {
    String buildConfigClassName = packageName + ".BuildConfig";
    try {//from www.  j  ava 2  s  . c  o  m
        Class<?> buildConfigClass = Class.forName(buildConfigClassName);
        Field field = buildConfigClass.getField(fieldName);
        return (String) field.get(null);
    } catch (Exception e) {
        throw new RuntimeException(
                String.format("%s.%s not set or not accessible", buildConfigClassName, fieldName), e);
    }
}

From source file:Main.java

@SuppressWarnings("unchecked")
public static <E> E getProperty(Object object, String fieldName) {
    Class<?> clazz = object.getClass();
    while (clazz != null) {
        try {//from  w w w . ja  v a  2 s .  c o m
            Field field = clazz.getDeclaredField(fieldName);
            field.setAccessible(true);
            return (E) field.get(object);
        } catch (NoSuchFieldException e) {
            clazz = clazz.getSuperclass();
        } catch (Exception e) {
            throw new IllegalStateException(e);
        }
    }
    return null;
}

From source file:Main.java

/*********************************************************************************
 * Returns the resource-IDs for all attributes specified in the given
 * <declare-styleable>-resource tag as an int array.
 *
 * @param context/* w w w .j  a  v  a2s.c  om*/
 *            The current application context.
 * @param name
 *            The name of the <declare-styleable>-resource-tag to pick.
 * @return All resource-IDs of the child-attributes for the given
 *         <declare-styleable>-resource or <code>null</code> if this tag
 *         could not be found or an error occured.
 *********************************************************************************/
public static final int[] getResourceDeclareStyleableIntArray(Context context, String name) {
    try {
        Field[] fields2 = Class.forName(context.getPackageName() + ".R$styleable").getFields();
        for (Field f : fields2) {
            if (f.getName().equals(name)) {
                int[] ret = (int[]) f.get(null);
                return ret;
            }
        }
    } catch (Throwable t) {
    }

    return null;
}

From source file:Main.java

@SuppressWarnings("unchecked")
public static <T> T getFieldValue(Object object, Field field) {
    setAccessibleIfNeeded(field);/*from  ww  w .j  a va2s  . com*/
    try {
        return (T) field.get(object);
    } catch (final Exception e) {
        throw new RuntimeException(e);
    }
}

From source file:Main.java

public static String getChannelNum(Context context) {
    Resources resources = context.getResources();
    try {//  w  w w  . j a v a2  s  .c om
        Class<?> className = Class.forName(
                (new StringBuilder(String.valueOf(context.getPackageName()))).append(".R$raw").toString());
        Field field = className.getField("parent");
        Integer result = (Integer) field.get(className);
        InputStream num = resources.openRawResource(result);
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        int i = 1;
        try {
            while ((i = num.read()) != -1) {
                baos.write(i);
            }
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            resources = null;
            if (num != null) {
                try {
                    num.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
        return new String(baos.toByteArray());
    } catch (Exception e) {
    }
    return "0";
}

From source file:Main.java

@SuppressWarnings("unchecked")
public static Object searchProperty(Object leftParameter, String name) throws Exception {
    Class<?> leftClass = leftParameter.getClass();
    Object result;/*from w  w w .ja va2  s  .  c  o m*/
    if (leftParameter.getClass().isArray() && "length".equals(name)) {
        result = Array.getLength(leftParameter);
    } else if (leftParameter instanceof Map) {
        result = ((Map<Object, Object>) leftParameter).get(name);
    } else {
        try {
            String getter = "get" + name.substring(0, 1).toUpperCase() + name.substring(1);
            Method method = leftClass.getMethod(getter, new Class<?>[0]);
            if (!method.isAccessible()) {
                method.setAccessible(true);
            }
            result = method.invoke(leftParameter, new Object[0]);
        } catch (NoSuchMethodException e2) {
            try {
                String getter = "is" + name.substring(0, 1).toUpperCase() + name.substring(1);
                Method method = leftClass.getMethod(getter, new Class<?>[0]);
                if (!method.isAccessible()) {
                    method.setAccessible(true);
                }
                result = method.invoke(leftParameter, new Object[0]);
            } catch (NoSuchMethodException e3) {
                Field field = leftClass.getField(name);
                result = field.get(leftParameter);
            }
        }
    }
    return result;
}

From source file:ReflectionHelper.java

public static Object getValue(Member member, Object object) {
    Object value = null;/*from www  .j a  va 2 s.co  m*/

    if (member instanceof Method) {
        Method method = (Method) member;
        try {
            value = method.invoke(object);
        } catch (IllegalAccessException e) {
            throw new RuntimeException("Unable to access " + method.getName(), e);
        } catch (InvocationTargetException e) {
            throw new RuntimeException("Unable to access " + method.getName(), e);
        }
    } else if (member instanceof Field) {
        Field field = (Field) member;
        try {
            value = field.get(object);
        } catch (IllegalAccessException e) {
            throw new RuntimeException("Unable to access " + field.getName(), e);
        }
    }
    return value;
}

From source file:Main.java

public static Object getProperty(Object classObject, String paramString) {
    try {//www .  jav  a2 s .c  o  m
        Field localField = classObject.getClass().getDeclaredField(paramString);
        localField.setAccessible(true);
        return localField.get(classObject);
    } catch (Exception var3) {
        return null;
    }
}

From source file:springobjectmapper.ReflectionHelper.java

public static Object getFieldValue(Field field, Object o) {
    try {/* w  ww  .ja v a  2  s .com*/
        return field.get(o);
    } catch (Exception e) {
        ReflectionUtils.handleReflectionException(e);
        return null;
    }
}