Example usage for org.apache.commons.beanutils ConstructorUtils getAccessibleConstructor

Introduction

In this page you can find the example usage for org.apache.commons.beanutils ConstructorUtils getAccessibleConstructor.

Prototype

public static Constructor getAccessibleConstructor(Class klass, Class[] parameterTypes) 

Source Link

Document

Returns a constructor given a class and signature.

Usage

From source file:com.comcast.cereal.convert.MapCerealizer.java

private static boolean isInstantiable(Class<?> clazz) {
    boolean abs = Modifier.isAbstract(clazz.getModifiers());
    boolean hasConstuctor = ConstructorUtils.getAccessibleConstructor(clazz, new Class[0]) != null;
    return !clazz.isInterface() && !abs && hasConstuctor;
}

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From source file:nl.ucan.navigate.NestedPath.java

private void growCollection(Object instance, String prop, int positionalIdx) throws NoSuchMethodException,
        IntrospectionException, IllegalAccessException, InvocationTargetException, InstantiationException {
    Object propInstance = pub.getProperty(instance, prop);
    if (propInstance != null) {
        if (propInstance.getClass().isArray()) {
            Object[] elementData = (Object[]) propInstance;
            int oldCapacity = elementData.length;
            int minCapacity = positionalIdx + 1;
            if (minCapacity > oldCapacity) {
                Object oldData[] = elementData;
                int newCapacity = (oldCapacity * 3) / 2 + 1;
                if (newCapacity < minCapacity)
                    newCapacity = minCapacity;
                elementData = Arrays.copyOf(elementData, newCapacity);
                pub.setProperty(instance, prop, elementData);
            }/* ww w  .j  av a  2 s  .  c om*/
            if (elementData[positionalIdx] == null) {
                Class clasz = elementData.getClass().getComponentType();
                Constructor constructor = ConstructorUtils.getAccessibleConstructor(clasz, new Class[] {});
                elementData[positionalIdx] = constructor.newInstance();
            }

        }
    }
}

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From source file:nl.ucan.navigate.NestedPath.java

private static Object createInstanceOfCollection(Class clasz, String prop) throws IntrospectionException,
        IllegalAccessException, InvocationTargetException, InstantiationException {
    Class type = getCollectionReturnType(prop, clasz);
    Constructor constructor = ConstructorUtils.getAccessibleConstructor(type, new Class[] {});
    return constructor.newInstance();
}

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From source file:org.apache.struts.chain.ComposableRequestProcessor.java

/**
 * <p> Set and cache ActionContext class. </p><p> If there is a custom
 * class provided and if it uses our "preferred" constructor, cache a
 * reference to that constructor rather than looking it up every time.
 * </p>/*w  w  w . j  a v a2 s  . c  om*/
 *
 * @param actionContextClass The ActionContext class to process
 */
private void setActionContextClass(Class actionContextClass) {
    this.actionContextClass = actionContextClass;

    if (actionContextClass != null) {
        this.servletActionContextConstructor = ConstructorUtils.getAccessibleConstructor(actionContextClass,
                SERVLET_ACTION_CONTEXT_CTOR_SIGNATURE);
    } else {
        this.servletActionContextConstructor = null;
    }
}

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From source file:org.codehaus.mojo.pomtools.console.screens.custom.ListDependenciesScreen.java

private ConsoleScreen createEditorScreen(String className, int index) {
    try {/*from  w  w  w.  jav  a  2  s . co m*/
        Constructor con = ConstructorUtils.getAccessibleConstructor(Class.forName(className),
                LIST_EDITOR_SIGNATURE);

        return (ConsoleScreen) con.newInstance(new Object[] { dependencies, new Integer(index) });
    } catch (ClassNotFoundException e) {
        throw new ModelReflectionException(e);
    } catch (IllegalArgumentException e) {
        throw new ModelReflectionException(e);
    } catch (InstantiationException e) {
        throw new ModelReflectionException(e);
    } catch (IllegalAccessException e) {
        throw new ModelReflectionException(e);
    } catch (InvocationTargetException e) {
        throw new ModelReflectionException(e);
    }
}

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From source file:org.codehaus.mojo.pomtools.helpers.ModelHelper.java

public static Constructor getConstructor(Class clazz, Class[] signature) {
    Constructor con = ConstructorUtils.getAccessibleConstructor(clazz, signature);

    if (con == null) {
        throw new ModelReflectionException("Unable to locate the constructor for: " + clazz.getName()
                + " with the signature " + String.valueOf(signature));
    }/*from  w ww .  ja  v  a 2 s .  com*/

    return con;
}

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From source file:org.force66.beantester.utils.InstantiationUtils.java

public static Constructor<?> findPublicConstructor(Class<?> klass) {
    Validate.notNull(klass, "Null class not allowed.");
    Constructor<?> nullConstructor = ConstructorUtils.getAccessibleConstructor(klass, new Class<?>[0]);
    if (nullConstructor != null) {
        return nullConstructor;
    }/*  ww  w. j  a v a 2s. c o  m*/

    Constructor<?>[] constructorArray = klass.getConstructors();
    for (Constructor<?> constructor : constructorArray) {
        if (Modifier.isPublic(constructor.getModifiers())) {
            return constructor;
        }
    }

    return null;
}

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From source file:org.geoserver.catalog.impl.ModificationProxyCloner.java

/**
 * Best effort object cloning utility, tries different lightweight strategies, then falls back
 * on copy by XStream serialization (we use that one as we have a number of hooks to avoid deep
 * copying the catalog, and re-attaching to it, in there)
 * //from  www . j av a  2  s  .c  om
 * @param source
 * @return
 */
static <T> T clone(T source) {
    // null?
    if (source == null) {
        return null;
    }

    // already a modification proxy?
    if (ModificationProxy.handler(source) != null) {
        return source;
    }

    // is it a catalog info?
    if (source instanceof CatalogInfo) {
        // mumble... shouldn't we wrap this one in a modification proxy object?
        return (T) ModificationProxy.create(source, getDeepestCatalogInfoInterface((CatalogInfo) source));
    }

    // if a known immutable?
    if (source instanceof String || source instanceof Byte || source instanceof Short
            || source instanceof Integer || source instanceof Float || source instanceof Double
            || source instanceof BigInteger || source instanceof BigDecimal) {
        return (T) source;
    }

    // is it cloneable?
    try {
        if (source instanceof Cloneable) {
            // methodutils does not seem to work against "clone()"...
            // return (T) MethodUtils.invokeExactMethod(source, "clone", null, null);
            Method method = source.getClass().getDeclaredMethod("clone");
            if (Modifier.isPublic(method.getModifiers()) && method.getParameterTypes().length == 0) {
                return (T) method.invoke(source);
            }
        }
    } catch (Exception e) {
        LOGGER.log(Level.FINE,
                "Source object is cloneable, yet it does not have a public no argument method 'clone'", e);
    }

    // does it have a copy constructor?
    Constructor copyConstructor = ConstructorUtils.getAccessibleConstructor(source.getClass(),
            source.getClass());
    if (copyConstructor != null) {
        try {
            return (T) copyConstructor.newInstance(source);
        } catch (Exception e) {
            LOGGER.log(Level.FINE, "Source has a copy constructor, but it failed, skipping to XStream", e);
        }
    }

    if (source instanceof Serializable) {
        return (T) SerializationUtils.clone((Serializable) source);
    } else {
        XStreamPersister persister = XSTREAM_PERSISTER_FACTORY.createXMLPersister();
        XStream xs = persister.getXStream();
        String xml = xs.toXML(source);
        T copy = (T) xs.fromXML(xml);
        return copy;
    }
}

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