Example usage for java.lang.reflect Field set

Introduction

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

Prototype

@CallerSensitive
@ForceInline 
public void set(Object obj, Object value) throws IllegalArgumentException, IllegalAccessException 

Source Link

Document

Sets the field represented by this Field object on the specified object argument to the specified new value.

Usage

From source file:org.cybercat.automation.annotations.AnnotationBuilder.java

/**
 * @param targetObject//ww  w.  ja va2s .  c  o m
 * @param fields
 * @param i
 * @throws AutomationFrameworkException
 */
public static void processPropertyField(Object targetObject, Field field) throws AutomationFrameworkException {
    try {
        CCProperty properties = field.getAnnotation(CCProperty.class);
        StringBuffer value = new StringBuffer("");
        for (String prop : properties.value()) {
            value.append(AutomationMain.getProperty(prop));
        }
        field.set(targetObject, value.toString());
    } catch (Exception e) {
        throw new AutomationFrameworkException(
                "Set filed exception. Please, save this log and contact the Cybercat project support."
                        + " field name: " + field.getName() + " class: "
                        + targetObject.getClass().getSimpleName() + " Thread ID:"
                        + Thread.currentThread().getId(),
                e);
    }
}

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From source file:com.bosscs.spark.commons.utils.Utils.java

/**
 * @param object/*from w  ww.ja v  a  2 s .co m*/
 * @param fieldName
 * @param fieldValue
 * @return if the operation has been correct.
 */
public static boolean setFieldWithReflection(Object object, String fieldName, Object fieldValue) {
    Class<?> clazz = object.getClass();
    while (clazz != null) {
        try {
            Field field = clazz.getDeclaredField(fieldName);
            field.setAccessible(true);
            field.set(object, fieldValue);
            return true;
        } catch (NoSuchFieldException e) {
            clazz = clazz.getSuperclass();
        } catch (Exception e) {
            throw new IllegalStateException(e);
        }
    }
    return false;
}

---

From source file:ml.dmlc.xgboost4j.java.NativeLibLoader.java

/**
 * Add libPath to java.library.path, then native library in libPath would be load properly
 *
 * @param libPath library path/*  ww  w. j a v a 2 s .  c  o  m*/
 * @throws IOException exception
 */
private static void addNativeDir(String libPath) throws IOException {
    try {
        Field field = ClassLoader.class.getDeclaredField("usr_paths");
        field.setAccessible(true);
        String[] paths = (String[]) field.get(null);
        for (String path : paths) {
            if (libPath.equals(path)) {
                return;
            }
        }
        String[] tmp = new String[paths.length + 1];
        System.arraycopy(paths, 0, tmp, 0, paths.length);
        tmp[paths.length] = libPath;
        field.set(null, tmp);
    } catch (IllegalAccessException e) {
        logger.error(e.getMessage());
        throw new IOException("Failed to get permissions to set library path");
    } catch (NoSuchFieldException e) {
        logger.error(e.getMessage());
        throw new IOException("Failed to get field handle to set library path");
    }
}

---

From source file:com.jilk.ros.rosbridge.implementation.JSON.java

private static Message convertJSONArrayToMessage(JSONArray ja, Class c, Registry<Class> r) {
    try {/*from   w  ww  .j av  a  2  s  .  c  om*/
        Message result = (Message) c.newInstance();
        int arrayIndex = 0;
        for (Field f : c.getFields()) {
            Class fc = getFieldClass(result, null, f, r);
            Object lookup = ja.get(arrayIndex++); // yes we are assuming that the fields are delivered in order
            if (lookup != null) {
                Object value = convertElementToField(lookup, fc, f, r);
                f.set(result, value);
            }
        }

        return result;
    } catch (Exception ex) {
        ex.printStackTrace();
        return null;
    }
}

---

From source file:com.taobao.android.builder.tools.guide.AtlasConfigHelper.java

public static void setProperty(Object object, String fieldName, String value)
        throws IllegalAccessException, InstantiationException, InvocationTargetException, NoSuchFieldException {

    String[] fieldNames = fieldName.split("\\.");

    Object last = object;/* w ww.jav a2s  .  com*/
    for (int i = 0; i < fieldNames.length - 1; i++) {

        String field = fieldNames[i];

        if (last instanceof NamedDomainObjectContainer) {
            last = ((NamedDomainObjectContainer) last).maybeCreate(field);
        } else {
            Field declaredField = last.getClass().getField(field);
            declaredField.setAccessible(true);

            if (null == declaredField.get(last)) {
                Object newInstance = declaredField.getType().getConstructors().getClass().newInstance();
                declaredField.set(last, newInstance);
            }

            last = declaredField.get(last);
        }
    }

    BeanUtils.setProperty(last, fieldNames[fieldNames.length - 1], value);
}

---

From source file:net.ostis.sc.memory.SCKeynodesBase.java

private static boolean checkKeynodeURI(SCSession session, Field field)
        throws IllegalArgumentException, IllegalAccessException {
    KeynodeURI keynodeURI = field.getAnnotation(KeynodeURI.class);

    if (keynodeURI != null) {
        String[] comp = URIUtils.splitByIdtf(keynodeURI.value());

        SCSegment segment = session.openSegment(comp[0]);

        SCAddr keynode = session.findByIdtf(comp[1], segment);
        Validate.notNull(keynode);// w  ww . j  av  a 2s . c  om

        field.set(null, keynode);

        if (log.isDebugEnabled())
            log.debug(keynodeURI.value() + " --> " + field.getName());

        return true;
    } else {
        return false;
    }
}

---

From source file:hivemall.xgboost.NativeLibLoader.java

/**
 * Add libPath to java.library.path, then native library in libPath would be load properly.
 *
 * @param libPath library path//from  w ww .  j a v a  2 s.  c  o m
 * @throws IOException exception
 */
private static void addLibraryPath(String libPath) throws IOException {
    try {
        final Field field = ClassLoader.class.getDeclaredField("usr_paths");
        field.setAccessible(true);
        final String[] paths = (String[]) field.get(null);
        for (String path : paths) {
            if (libPath.equals(path)) {
                return;
            }
        }
        final String[] tmp = new String[paths.length + 1];
        System.arraycopy(paths, 0, tmp, 0, paths.length);
        tmp[paths.length] = libPath;
        field.set(null, tmp);
    } catch (IllegalAccessException e) {
        logger.error(e.getMessage());
        throw new IOException("Failed to get permissions to set library path");
    } catch (NoSuchFieldException e) {
        logger.error(e.getMessage());
        throw new IOException("Failed to get field handle to set library path");
    }
}

---

From source file:de.micromata.genome.util.runtime.ClassUtils.java

/**
 * Set all String field to empty on current class.
 *
 * @param object the object/*  w w  w.  j av a2  s . c  om*/
 * @param exceptClass the except class
 * @throws IllegalArgumentException the illegal argument exception
 * @throws IllegalAccessException the illegal access exception
 */
// CHECKSTYLE.OFF com.puppycrawl.tools.checkstyle.checks.metrics.CyclomaticComplexityCheck Trivial code.
public static void fillDefaultEmptyFieldsIfEmpty(Object object, Class<?>... exceptClass) // NOSONAR "Methods should not be too complex" trivial
        throws IllegalArgumentException, IllegalAccessException {
    Class<?> currentClazz = object.getClass();
    List exClazzes = Arrays.asList(exceptClass);
    while (currentClazz.getSuperclass() != null) {
        if (exClazzes.contains(currentClazz) == false) {
            Field[] fields = currentClazz.getDeclaredFields();
            for (Field field : fields) {
                if (String.class.equals(field.getType())) {
                    field.setAccessible(true);
                    if (field.get(object) == null) {
                        field.set(object, "");
                    }
                }
                if (Integer.class.equals(field.getType())) {
                    field.setAccessible(true);
                    if (field.get(object) == null) {
                        field.set(object, 0);
                    }
                }
                if (BigDecimal.class.equals(field.getType())) {
                    field.setAccessible(true);
                    if (field.get(object) == null) {
                        field.set(object, BigDecimal.ZERO);
                    }
                }
                if (Date.class.equals(field.getType())) {
                    field.setAccessible(true);
                    if (field.get(object) == null) {
                        field.set(object, new Date());
                    }
                }
            }
        }
        currentClazz = currentClazz.getSuperclass();
    }
}

---

From source file:tools.xor.util.ClassUtil.java

/** 
 * Invoke the given method as a privileged action, if necessary. 
 * @param target the object on which the method needs to be invoked
 * @param field we are reading or writing
 * @param value to set in the field/*w  w w . j av  a 2  s .  com*/
 * @param read true if this a read operation
 * @return result of the invocation
 * @throws InvocationTargetException while invoking the method
 * @throws IllegalAccessException when accessing the meta data
 */
public static Object invokeFieldAsPrivileged(final Object target, final Field field, final Object value,
        final boolean read) throws InvocationTargetException, IllegalAccessException {

    if (Modifier.isPublic(field.getModifiers())) {
        Object readValue = null;
        if (read)
            readValue = field.get(target);
        else
            field.set(target, value);
        return readValue;
    } else {
        return AccessController.doPrivileged(new PrivilegedAction<Object>() {
            public Object run() {
                field.setAccessible(true);
                Object readValue = null;
                try {
                    if (read)
                        readValue = field.get(target);
                    else
                        field.set(target, value);
                } catch (Exception e) {
                    throw wrapRun(e);
                }
                return readValue;
            }
        });
    }
}

---

From source file:com.initialxy.cordova.themeablebrowser.ThemeableBrowserUnmarshaller.java

/**
 * Given a JSONObject, unmarhall it to an instance of the given class.
 *
 * @param jsonObj JSON string to unmarshall.
 * @param cls Return an instance of this class. Must be either public class
 *            or private static class. Inner class will not work.
 * @param <T> Same type as cls.//from w w  w . j a  va2s. com
 * @return An instance of class given by cls.
 * @throws com.initialxy.cordova.themeablebrowser.ThemeableBrowserUnmarshaller.TypeMismatchException
 */
public static <T> T JSONToObj(JSONObject jsonObj, Class<T> cls) {
    T result = null;

    try {
        Constructor<T> constructor = cls.getDeclaredConstructor();
        constructor.setAccessible(true);
        result = (T) constructor.newInstance();
        Iterator<?> i = jsonObj.keys();

        while (i.hasNext()) {
            String k = (String) i.next();
            Object val = jsonObj.get(k);

            try {
                Field field = cls.getField(k);
                Object converted = valToType(val, field.getGenericType());

                if (converted == null) {
                    if (!field.getType().isPrimitive()) {
                        field.set(result, null);
                    } else {
                        throw new TypeMismatchException(
                                String.format("Type %s cannot be set to null.", field.getType()));
                    }
                } else {
                    if (converted instanceof List && field.getType().isAssignableFrom(List.class)) {
                        // Class can define their own favorite
                        // implementation of List. In which case the field
                        // still need to be defined as List, but it can be
                        // initialized with a placeholder instance of any of
                        // the List implementations (eg. ArrayList).
                        Object existing = field.get(result);
                        if (existing != null) {
                            ((List<?>) existing).clear();

                            // Just because I don't want javac to complain
                            // about unsafe operations. So I'm gonna use
                            // more reflection, HA!
                            Method addAll = existing.getClass().getMethod("addAll", Collection.class);
                            addAll.invoke(existing, converted);
                        } else {
                            field.set(result, converted);
                        }
                    } else {
                        field.set(result, converted);
                    }
                }
            } catch (NoSuchFieldException e) {
                // Ignore.
            } catch (IllegalAccessException e) {
                // Ignore.
            } catch (IllegalArgumentException e) {
                // Ignore.
            }
        }
    } catch (JSONException e) {
        throw new ParserException(e);
    } catch (NoSuchMethodException e) {
        throw new ClassInstantiationException("Failed to retrieve constructor for " + cls.toString()
                + ", make sure it's not an inner class.");
    } catch (InstantiationException e) {
        throw new ClassInstantiationException(cls);
    } catch (IllegalAccessException e) {
        throw new ClassInstantiationException(cls);
    } catch (InvocationTargetException e) {
        throw new ClassInstantiationException(cls);
    }

    return result;
}

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