Example usage for java.lang.reflect Field get

List of usage examples for java.lang.reflect Field get

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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:io.servicecomb.config.TestConfigUtil.java

@SuppressWarnings("unchecked")
private static void setEnv(String key, String value) throws IllegalAccessException, NoSuchFieldException {
    Class<?>[] classes = Collections.class.getDeclaredClasses();
    Map<String, String> env = System.getenv();
    for (Class<?> cl : classes) {
        if ("java.util.Collections$UnmodifiableMap".equals(cl.getName())) {
            Field field = cl.getDeclaredField("m");
            field.setAccessible(true);//from w w w  . j  a  v  a  2  s  .  co m
            Object obj = field.get(env);
            Map<String, String> map = (Map<String, String>) obj;
            map.put(key, value);
        }
    }
}

From source file:ca.psiphon.tunneledwebview.WebViewProxySettings.java

@TargetApi(Build.VERSION_CODES.KITKAT) // for android.util.ArrayMap methods
@SuppressWarnings("rawtypes")
private static boolean setWebkitProxyLollipop(Context appContext, String host, int port) {
    System.setProperty("http.proxyHost", host);
    System.setProperty("http.proxyPort", port + "");
    System.setProperty("https.proxyHost", host);
    System.setProperty("https.proxyPort", port + "");
    try {//from w w w. j a  va 2 s . co  m
        Class applictionClass = Class.forName("android.app.Application");
        Field mLoadedApkField = applictionClass.getDeclaredField("mLoadedApk");
        mLoadedApkField.setAccessible(true);
        Object mloadedApk = mLoadedApkField.get(appContext);
        Class loadedApkClass = Class.forName("android.app.LoadedApk");
        Field mReceiversField = loadedApkClass.getDeclaredField("mReceivers");
        mReceiversField.setAccessible(true);
        ArrayMap receivers = (ArrayMap) mReceiversField.get(mloadedApk);
        for (Object receiverMap : receivers.values()) {
            for (Object receiver : ((ArrayMap) receiverMap).keySet()) {
                Class clazz = receiver.getClass();
                if (clazz.getName().contains("ProxyChangeListener")) {
                    Method onReceiveMethod = clazz.getDeclaredMethod("onReceive", Context.class, Intent.class);
                    Intent intent = new Intent(Proxy.PROXY_CHANGE_ACTION);
                    onReceiveMethod.invoke(receiver, appContext, intent);
                }
            }
        }
        return true;
    } catch (ClassNotFoundException e) {
    } catch (NoSuchFieldException e) {
    } catch (IllegalAccessException e) {
    } catch (NoSuchMethodException e) {
    } catch (InvocationTargetException e) {
    }
    return false;
}

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:com.feilong.commons.core.lang.reflect.FieldUtil.java

/**
 * ???./*from  ww  w. ja  v  a2s  . co  m*/
 * 
 * <pre>
 * {@code
 * example1 :
 *  IOConstants GB??
 * FieldUtil.getStaticProperty("com.feilong.commons.core.io.IOConstants", "GB")
 *  :1073741824
 * }
 * </pre>
 * 
 * @param <T>
 *            the generic type
 * @param className
 *            ??
 * @param fieldName
 *            ??
 * @return 
 * @throws ReflectException
 *             the reflect exception
 * @see com.feilong.commons.core.lang.ClassUtil#loadClass(String)
 * @see java.lang.Class#getField(String)
 * @see java.lang.reflect.Field#get(Object)
 */
@SuppressWarnings("unchecked")
public static <T> T getStaticProperty(String className, String fieldName) throws ReflectException {
    try {
        Class<?> ownerClass = ClassUtil.loadClass(className);
        Field field = ownerClass.getField(fieldName);
        Object property = field.get(ownerClass);
        return (T) property;
    } catch (Exception e) {
        log.error(e.getClass().getName(), e);
        throw new ReflectException(e);
    }
}

From source file:com.test.edusys.common.utils.reflection.ReflectionUtils.java

/**
 * objectmap/*from ww  w .jav  a  2 s.com*/
* @param obj
* @return
* @throws Exception
*/
public static Map<String, Object> objectToMap(Object obj) throws Exception {
    if (obj == null) {
        return null;
    }

    Map<String, Object> map = new HashMap<String, Object>();

    Field[] declaredFields = obj.getClass().getDeclaredFields();
    for (Field field : declaredFields) {
        field.setAccessible(true);
        map.put(field.getName(), field.get(obj));
    }

    return map;
}

From source file:com.savor.ads.core.ApiRequestFactory.java

@NonNull
private static JSONObject getJSONObject(Object object) {
    Field[] fields = object.getClass().getDeclaredFields();
    JSONObject jObject = new JSONObject();
    for (Field field : fields) {
        try {// ww w  .  ja v a 2  s  . com
            field.setAccessible(true);
            Object fieldValue = field.get(object);
            if (fieldValue instanceof String || fieldValue instanceof Number || fieldValue == null) {
                jObject.put(field.getName(), fieldValue);
            } else if (fieldValue instanceof List) {
                jObject.put(field.getName(), getJSONArray((List<?>) fieldValue));
            } else {
                jObject.put(field.getName(), getJSONObject(fieldValue));
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
    return jObject;
}

From source file:Main.java

/**
 * Coverter.//  www .j av  a 2 s  .  com
 *
 * @param object
 *            the object
 * @return the string
 */
@SuppressWarnings("unused")
public static String coverter(Object object) {
    if (object instanceof Object[]) {
        return coverter((Object[]) object);
    }
    if (object instanceof Collection) {
        return coverter((Collection<?>) object);
    }
    StringBuilder strBuilder = new StringBuilder();
    if (isObject(object)) {
        Class<? extends Object> clz = object.getClass();
        Field[] fields = clz.getDeclaredFields();

        for (Field field : fields) {
            field.setAccessible(true);
            if (field == null) {
                continue;
            }
            String fieldName = field.getName();
            Object value = null;
            try {
                value = field.get(object);
            } catch (IllegalArgumentException e) {
                continue;
            } catch (IllegalAccessException e) {
                continue;
            }
            strBuilder.append("<").append(fieldName).append(" className=\"").append(value.getClass().getName())
                    .append("\">\n");
            strBuilder.append(value.toString() + "\n");
            strBuilder.append("</").append(fieldName).append(">\n");
        }
    } else if (object == null) {
        strBuilder.append("null");
    } else {
        strBuilder.append(object.toString());
    }
    return strBuilder.toString();
}

From source file:at.tuwien.ifs.somtoolbox.apps.SOMToolboxMain.java

/**
 * @param screenWidth the with of the screen
 * @param runnables {@link ArrayList} of available runnables.
 *//*from w w w.java 2s  .c om*/
private static void printAvailableRunnables(int screenWidth,
        ArrayList<Class<? extends SOMToolboxApp>> runnables) {
    Collections.sort(runnables, SOMToolboxApp.TYPE_GROUPED_COMPARATOR);

    ArrayList<Class<? extends SOMToolboxApp>> runnableClassList = new ArrayList<Class<? extends SOMToolboxApp>>();
    ArrayList<String> runnableNamesList = new ArrayList<String>();
    ArrayList<String> runnableDeskrList = new ArrayList<String>();

    for (Class<? extends SOMToolboxApp> c : runnables) {
        try {
            // Ignore abstract classes and interfaces
            if (Modifier.isAbstract(c.getModifiers()) || Modifier.isInterface(c.getModifiers())) {
                continue;
            }
            runnableClassList.add(c);
            runnableNamesList.add(c.getSimpleName());

            String desk = null;
            try {
                Field f = c.getDeclaredField("DESCRIPTION");
                desk = (String) f.get(null);
            } catch (Exception e) {
            }

            if (desk != null) {
                runnableDeskrList.add(desk);
            } else {
                runnableDeskrList.add("");
            }
        } catch (SecurityException e) {
            // Should not happen - no Security
        } catch (IllegalArgumentException e) {
            e.printStackTrace();
        }
    }
    StringBuilder sb = new StringBuilder();
    String lineSep = System.getProperty("line.separator", "\n");

    int maxLen = StringUtils.getLongestStringLength(runnableNamesList);
    sb.append("Runnable classes:").append(lineSep);
    for (int i = 0; i < runnableNamesList.size(); i++) {
        final Type cType = Type.getType(runnableClassList.get(i));
        if (i == 0 || !cType.equals(Type.getType(runnableClassList.get(i - 1)))) {
            sb.append(String.format("-- %s %s%s", cType.toString(),
                    StringUtils.repeatString(screenWidth - (8 + cType.toString().length()), "-"), lineSep));
        }
        sb.append("    ");
        sb.append(runnableNamesList.get(i));
        sb.append(StringUtils.getSpaces(4 + maxLen - runnableNamesList.get(i).length())).append("- ");
        sb.append(runnableDeskrList.get(i));
        sb.append(lineSep);
    }
    System.out.println(StringUtils.wrap(sb.toString(), screenWidth, StringUtils.getSpaces(maxLen + 10), true));
}

From source file:com.github.rvesse.airline.Accessor.java

@SuppressWarnings("unchecked")
private static Collection<Object> getOrCreateCollectionField(String name, Object object, Field field) {
    Collection<Object> collection;
    try {/* w  ww.  jav  a2 s .  co  m*/
        collection = (Collection<Object>) field.get(object);
    } catch (Exception e) {
        throw new ParseException(e, "Error getting collection field %s for argument %s", field.getName(), name);
    }

    if (collection == null) {
        collection = newCollection(field.getType());
        try {
            field.set(object, collection);
        } catch (Exception e) {
            throw new ParseException(e, "Error setting collection field %s for argument %s", field.getName(),
                    name);
        }
    }
    return collection;
}

From source file:com.atlassian.connector.eclipse.internal.crucible.ui.operations.CrucibleFileInfoCompareEditorInput.java

private static Viewer findContentViewer(Viewer contentViewer, ICompareInput input, Composite parent,
        CrucibleCompareAnnotationModel annotationModel) {

    // FIXME: hack
    if (contentViewer instanceof TextMergeViewer) {
        TextMergeViewer textMergeViewer = (TextMergeViewer) contentViewer;
        try {//from  w  ww. j a  va  2 s  . c om
            Class<TextMergeViewer> clazz = TextMergeViewer.class;
            Field declaredField = clazz.getDeclaredField("fLeft");
            declaredField.setAccessible(true);
            final MergeSourceViewer fLeft = (MergeSourceViewer) declaredField.get(textMergeViewer);

            declaredField = clazz.getDeclaredField("fRight");
            declaredField.setAccessible(true);
            final MergeSourceViewer fRight = (MergeSourceViewer) declaredField.get(textMergeViewer);

            annotationModel.attachToViewer(textMergeViewer, fLeft, fRight);
            annotationModel.focusOnComment();
            annotationModel.registerContextMenu();

            Method setActiveViewer = clazz.getDeclaredMethod("setActiveViewer", MergeSourceViewer.class,
                    boolean.class);
            setActiveViewer.setAccessible(true);
            setActiveViewer.invoke(textMergeViewer, fRight, true);

            hackGalileo(contentViewer, textMergeViewer, fLeft, fRight);
        } catch (Throwable t) {
            StatusHandler.log(new Status(IStatus.WARNING, AtlassianTeamUiPlugin.PLUGIN_ID,
                    "Could not initialize annotation model for " + input.getName(), t));
        }
    }
    return contentViewer;
}