Example usage for java.lang Class getField

Introduction

In this page you can find the example usage for java.lang Class getField.

Prototype

@CallerSensitive
public Field getField(String name) throws NoSuchFieldException, SecurityException 

Source Link

Document

Returns a Field object that reflects the specified public member field of the class or interface represented by this Class object.

Usage

From source file:Main.java

/**
 * Check application's R.id class and retrieve the value of the static
 * member with the given name.//w w w.  ja v  a  2  s.  c  o  m
 */
public static int getIdentifierFromR(Context context, String type, String name) {
    Class<?> rClass = null;
    try {
        rClass = Class.forName(context.getPackageName() + ".R$" + type);
    } catch (ClassNotFoundException e) {
        // No R.id class? This should never happen.
        throw new RuntimeException(e);
    }

    try {
        Field rField = rClass.getField(name);
        Object intValue;
        try {
            intValue = rField.get(null);
        } catch (IllegalAccessException e) {
            throw new RuntimeException(e);
        }
        if (!(intValue instanceof Integer)) {
            throw new RuntimeException("Not an int: " + rClass.getCanonicalName() + "." + rField.getName());
        }
        return ((Integer) intValue).intValue();
    } catch (NoSuchFieldException e) {
        throw new RuntimeException("There is no such id in the R class: " + context.getPackageName() + ".R."
                + type + "." + name + ")");
    } catch (SecurityException e) {
        throw new RuntimeException(e);
    }
}

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From source file:com.l2jfree.network.mmocore.packethandlers.PacketDefinition.java

public static Integer findOpcode(Class<?> clazz, String fieldName, boolean required) throws Exception {
    // easier than checking all the modifiers, visibility, type, etc :)
    final Field field;
    try {/* ww  w .j  a va2s.  c  o  m*/
        field = clazz.getField(fieldName);
    } catch (NoSuchFieldException e) {
        if (required) {
            System.err.println("Missing 'public static final int " + fieldName + "'!");
            throw e;
        } else
            return null; // ignore as it was expected
    }

    return field.getInt(null);
}

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From source file:jp.co.acroquest.endosnipe.perfdoctor.rule.RuleInstanceUtil.java

/**
 * ??//from   w w  w  .  ja  va  2s.c o  m
 * @param obj ?
 * @param fieldName ??
 * @param value 
 * @throws RuleCreateException ???????
 */
protected static void setValue(final Object obj, final String fieldName, final String value)
        throws RuleCreateException {
    Class<? extends Object> clazz = obj.getClass();
    Object[] args = new Object[] { clazz.getCanonicalName(), fieldName, value };

    try {
        Field field = clazz.getField(fieldName);

        Object convertedValue = ConvertUtils.convert(value, field.getType());
        field.set(obj, convertedValue);
    } catch (NoSuchFieldException ex) {
        throw new RuleCreateException(PerfConstants.PROPERTY_NOT_FOUND, args);
    } catch (SecurityException ex) {
        throw new RuleCreateException(PerfConstants.PROPERTY_ERROR, args);
    } catch (IllegalArgumentException ex) {
        throw new RuleCreateException(PerfConstants.PROPERTY_TYPE_ERROR, args);
    } catch (IllegalAccessException ex) {
        throw new RuleCreateException(PerfConstants.PROPERTY_ACCESS_ERROR, args);
    }
}

---

From source file:com.cleanwiz.applock.ui.BaseActivity.java

private static int getStatusBarHeight(Context context) {
    Class<?> c = null;
    Object obj = null;/* w ww  .ja v a  2 s .c  o  m*/
    Field field = null;
    int x = 0, statusBarHeight = 0;
    try {
        c = Class.forName("com.android.internal.R$dimen");
        obj = c.newInstance();
        field = c.getField("status_bar_height");
        x = Integer.parseInt(field.get(obj).toString());
        statusBarHeight = context.getResources().getDimensionPixelSize(x);
    } catch (Exception e1) {
        e1.printStackTrace();
    }
    return statusBarHeight;
}

---

From source file:net.sf.jvifm.ResourceManager.java

@SuppressWarnings("unchecked")
public static Font getFont(String name, int size, int style, boolean strikeout, boolean underline) {
    String fontName = name + "|" + size + "|" + style + "|" + strikeout + "|" + underline;
    if (resources.containsKey(fontName))
        return (Font) resources.get(fontName);
    FontData fd = new FontData(name, size, style);
    if (strikeout || underline) {
        try {//from  w w w .  j  a  v  a  2s.co m
            Class lfCls = Class.forName("org.eclipse.swt.internal.win32.LOGFONT");
            Object lf = FontData.class.getField("data").get(fd);
            if (lf != null && lfCls != null) {
                if (strikeout)
                    lfCls.getField("lfStrikeOut").set(lf, new Byte((byte) 1));
                if (underline)
                    lfCls.getField("lfUnderline").set(lf, new Byte((byte) 1));
            }
        } catch (Throwable e) {
            System.err.println(
                    "Unable to set underline or strikeout" + " (probably on a non-Windows platform). " + e);
        }
    }
    Font font = new Font(Display.getDefault(), fd);
    resources.put(fontName, font);
    return font;
}

---

From source file:com.feilong.commons.core.lang.reflect.FieldUtil.java

/**
 * ./*  w ww  . jav  a2 s . c  o m*/
 * 
 * @param owner
 *            the owner
 * @param fieldName
 *            
 * @param value
 *            
 * @throws ReflectException
 *             the reflect exception
 * @see java.lang.Object#getClass()
 * @see java.lang.Class#getField(String)
 * @see java.lang.reflect.Field#set(Object, Object)
 */
public static void setProperty(Object owner, String fieldName, Object value) throws ReflectException {
    try {
        Class<?> ownerClass = owner.getClass();
        Field field = ownerClass.getField(fieldName);
        field.set(ownerClass, value);
    } catch (Exception e) {
        log.error(e.getClass().getName(), e);
        throw new ReflectException(e);
    }
}

---

From source file:com.feilong.commons.core.lang.reflect.FieldUtil.java

/**
 * ?./*from   w w w  . j  a v a 2s.co  m*/
 * 
 * @param <T>
 *            the generic type
 * @param owner
 *            the owner
 * @param fieldName
 *            the field name
 * @return 
 * @throws ReflectException
 *             the reflect exception
 * 
 * @see java.lang.Object#getClass()
 * @see java.lang.Class#getField(String)
 * @see java.lang.reflect.Field#get(Object)
 */
@SuppressWarnings("unchecked")
public static <T> T getProperty(Object owner, String fieldName) throws ReflectException {
    try {
        Class<?> ownerClass = owner.getClass();
        Field field = ownerClass.getField(fieldName);
        Object property = field.get(owner);
        return (T) property;
    } catch (Exception e) {
        log.error(e.getClass().getName(), e);
        throw new ReflectException(e);
    }
}

---

From source file:org.talend.core.utils.ReflectionUtils.java

/**
 * DOC ycbai Comment method "getPublicField".
 * //from w w  w  .j  av a 2s . com
 * Returns the value of a public field.
 * 
 * @param owner
 * @param fieldName
 * @return
 * @throws NoSuchFieldException
 * @throws SecurityException
 * @throws IllegalAccessException
 * @throws IllegalArgumentException
 * @throws Exception
 */
public static Object getPublicField(Object owner, String fieldName)
        throws SecurityException, NoSuchFieldException, IllegalArgumentException, IllegalAccessException {
    Object fieldValue = null;
    Class ownerClass = owner.getClass();
    Field field = ownerClass.getField(fieldName);
    fieldValue = field.get(owner);

    return fieldValue;
}

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From source file:Main.java

public static void mapToAndroidLayoutMapper(Class classObj, Map map, String prefixStr, Activity view) {

    if (map == null) {
        return;// w ww  . j  ava 2 s.  com
    }

    for (Object keyObj : map.keySet().toArray()) {
        String keyStr = keyObj.toString();
        Field fieldObj = null;
        try {
            fieldObj = classObj.getField(prefixStr + "_" + keyStr);
        } catch (NoSuchFieldException e) {
            continue;
        }
        Object layoutObj = null;
        try {
            layoutObj = fieldObj.get(fieldObj);
        } catch (IllegalAccessException e) {
            continue;
        }
        Integer layoutIntvalue = (Integer) layoutObj;

        View selectedView = view.findViewById(layoutIntvalue);

        if (selectedView instanceof TextView) {
            TextView textView = (TextView) selectedView;
            textView.setText((String) map.get(keyStr));
        } else if (selectedView instanceof ImageView) {
            ImageView imageView = (ImageView) selectedView;

        }

    }

}

---

From source file:com.crazy.pss.common.utils.Reflections.java

public static boolean hasAttribute(final String attrName, final Class clazz) {
    Field f = null;//from  w w w . j a  v  a2  s  . c  om
    try {
        f = clazz.getField(attrName);
    } catch (SecurityException e) {
        if (logger.isErrorEnabled()) {
            logger.error("?Class=" + clazz + "" + attrName + "", e.getCause());
        }
        return false;
    } catch (NoSuchFieldException e) {
        if (logger.isErrorEnabled()) {
            logger.error("?Class=" + clazz + "" + attrName + "", e.getCause());
        }
        return false;
    }
    return f == null ? false : true;
}

---

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