Example usage for java.lang Class getDeclaredConstructor

Introduction

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

Prototype

@CallerSensitive
public Constructor<T> getDeclaredConstructor(Class<?>... parameterTypes)
        throws NoSuchMethodException, SecurityException 

Source Link

Document

Returns a Constructor object that reflects the specified constructor of the class or interface represented by this Class object.

Usage

From source file:ml.shifu.shifu.util.ClassUtils.java

public static <T> T newInstance(Class<T> clazz, Class<?>[] parameterClasses, Object[] parameters) {
    T result;// w w w .  jav  a2 s .  c  o m
    try {
        @SuppressWarnings("unchecked")
        Constructor<T> meth = (Constructor<T>) CONSTRUCTOR_CACHE.get(clazz);
        if (meth == null) {
            meth = clazz.getDeclaredConstructor(parameterClasses);
            meth.setAccessible(true);
            CONSTRUCTOR_CACHE.put(clazz, meth);
        }
        result = meth.newInstance(parameters);
    } catch (Exception e) {
        throw new RuntimeException(e);
    }
    return result;
}

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From source file:org.jpmml.sparkml.ConverterUtil.java

static public <T extends Transformer> TransformerConverter<T> createConverter(T transformer) {
    Class<? extends Transformer> clazz = transformer.getClass();

    Class<? extends TransformerConverter> converterClazz = getConverterClazz(clazz);
    if (converterClazz == null) {
        throw new IllegalArgumentException("Transformer class " + clazz.getName() + " is not supported");
    }//w w w  .j ava2 s . co  m

    try {
        Constructor<?> constructor = converterClazz.getDeclaredConstructor(clazz);

        return (TransformerConverter) constructor.newInstance(transformer);
    } catch (Exception e) {
        throw new IllegalArgumentException(e);
    }
}

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From source file:nl.nn.adapterframework.util.ClassUtils.java

/**
* Retrieves the constructor of a class, based on the parameters
*
**//*from w  w w.j a  va2 s .  c om*/
public static Constructor getConstructorOnType(Class clas, Class[] parameterTypes) {
    Constructor theConstructor = null;
    try {
        theConstructor = clas.getDeclaredConstructor(parameterTypes);
    } catch (java.lang.NoSuchMethodException e) {
        log.error("cannot create constructor for Class [" + clas.getName() + "]", e);
        for (int i = 0; i < parameterTypes.length; i++)
            log.error("Parameter " + i + " type " + parameterTypes[i].getName());
    }
    return theConstructor;
}

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From source file:org.opoo.util.ClassUtils.java

public static Constructor getDefaultConstructor(Class clazz) throws SecurityException, NoSuchMethodException {
    if (isAbstractClass(clazz))
        return null;
    Constructor constructor = clazz.getDeclaredConstructor(NO_CLASSES);
    if (!isPublic(clazz, constructor)) {
        constructor.setAccessible(true);
    }/*from w ww  .  j av  a  2  s .c  o  m*/
    return constructor;
}

---

From source file:cn.vlabs.duckling.vwb.service.auth.policy.PolicyUtil.java

private static Permission parsePermission(AuthorizationTokenStream ats)
        throws AuthorizationSyntaxParseException, IOException {
    String perm = ats.nextUsefulToken();
    if (perm == null) {
        throw new AuthorizationSyntaxParseException("Line " + ats.getLineNum() + ", permission syntax error");
    } else if (!perm.toLowerCase().equals("permission")) {
        String rightBracket = perm;
        if (rightBracket == null || !rightBracket.contains("}")) {
            throw new AuthorizationSyntaxParseException("Line " + ats.getLineNum() + ", no right bracket");
        } else if (!rightBracket.contains(";")) {
            throw new AuthorizationSyntaxParseException("Line " + ats.getLineNum() + ", no \";\" sign finded");
        }/*from  w  w w  .j  a v a 2 s .com*/
        return null;
    }
    String className = ats.nextUsefulToken();
    String isEnd = ats.nextUsefulToken();
    if (className == null) {
        throw new AuthorizationSyntaxParseException("Line " + ats.getLineNum() + ", className is null");
    }
    if (isEnd == null) {
        throw new AuthorizationSyntaxParseException("Line " + ats.getLineNum() + ", no operate object defined");
    } else {
        try {
            if (!isEnd.contains(";")) {
                String oper = isEnd;
                oper = oper.replace("\"", "");
                oper = oper.replace(",", "");
                isEnd = ats.nextUsefulToken();
                if (isEnd != null && isEnd.contains(";")) {
                    String actions = isEnd.replace(";", "");
                    actions = actions.replace("\"", "");
                    Class<?> clazz = Class.forName(className, false, VWBPermission.class.getClassLoader());
                    return ((Permission) clazz
                            .getDeclaredConstructor(new Class[] { String.class, String.class })
                            .newInstance(oper, actions));
                } else {
                    throw new AuthorizationSyntaxParseException(
                            "Line " + ats.getLineNum() + ", no \";\" sign finded");
                }
            } else {
                String oper = isEnd.replace(";", "");
                oper = oper.replace("\"", "");
                Class<?> clazz = Class.forName(className);
                return ((Permission) clazz.getDeclaredConstructor(String.class).newInstance(oper));
            }
        } catch (ClassNotFoundException e) {
            throw new AuthorizationSyntaxParseException(
                    "Line " + ats.getLineNum() + ", ClassNotFoundException, " + e.getMessage());
        } catch (Exception e) {
            e.printStackTrace();
            throw new AuthorizationSyntaxParseException(
                    "Line " + ats.getLineNum() + ", Exception happens, " + e.getMessage());
        }
    }
}

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From source file:com.fer.hr.olap.util.ObjectUtil.java

private static SaikuLevel convert(Level level) {
    Checker c = new Checker();
    try {/*ww  w.  java 2 s.  c o  m*/
        try {
            Class.forName("mondrian.olap4j.MondrianOlap4jLevelExtend");
            //Class.forName("bi.meteorite.CheckClass");
            Class<LevelInterface> _tempClass = (Class<LevelInterface>) Class
                    .forName("mondrian.olap4j.MondrianOlap4jLevelExtend");
            if (c.checker(level)) {
                Constructor<LevelInterface> ctor = _tempClass
                        .getDeclaredConstructor(org.olap4j.metadata.Level.class);
                LevelInterface test = ctor.newInstance(level);
                HashMap<String, String> m = null;
                if (test.getAnnotations() != null) {
                    m = new HashMap<>();
                    for (Map.Entry<String, Annotation> entry : test.getAnnotations().entrySet()) {
                        m.put(entry.getKey(), (String) entry.getValue().getValue());
                    }
                }
                return new SaikuLevel(test.getName(), test.getUniqueName(), test.getCaption(),
                        test.getDescription(), test.getDimension().getUniqueName(),
                        test.getHierarchy().getUniqueName(), test.isVisible(), test.getLevelType().toString(),
                        m);
            } else {
                return new SaikuLevel(level.getName(), level.getUniqueName(), level.getCaption(),
                        level.getDescription(), level.getDimension().getUniqueName(),
                        level.getHierarchy().getUniqueName(), level.isVisible(), null, null);
            }
        } catch (ClassNotFoundException e) {
            return new SaikuLevel(level.getName(), level.getUniqueName(), level.getCaption(),
                    level.getDescription(), level.getDimension().getUniqueName(),
                    level.getHierarchy().getUniqueName(), level.isVisible(), null, null);
        }

    } catch (Exception e) {
        throw new SaikuServiceException("Cannot convert level: " + level, e);
    }
}

---

From source file:org.saiku.olap.util.ObjectUtil.java

@NotNull
private static SaikuLevel convert(@NotNull Level level) {
    Checker c = new Checker();
    try {// w  ww  .ja  v  a 2s . co  m
        try {
            Class.forName("mondrian.olap4j.MondrianOlap4jLevelExtend");
            //Class.forName("bi.meteorite.CheckClass");
            Class<LevelInterface> _tempClass = (Class<LevelInterface>) Class
                    .forName("mondrian.olap4j.MondrianOlap4jLevelExtend");
            if (c.checker(level)) {
                Constructor<LevelInterface> ctor = _tempClass
                        .getDeclaredConstructor(org.olap4j.metadata.Level.class);
                LevelInterface test = ctor.newInstance(level);
                HashMap<String, String> m = null;
                if (test.getAnnotations() != null) {
                    m = new HashMap<>();
                    for (Map.Entry<String, Annotation> entry : test.getAnnotations().entrySet()) {
                        m.put(entry.getKey(), (String) entry.getValue().getValue());
                    }
                }
                return new SaikuLevel(test.getName(), test.getUniqueName(), test.getCaption(),
                        test.getDescription(), test.getDimension().getUniqueName(),
                        test.getHierarchy().getUniqueName(), test.isVisible(), test.getLevelType().toString(),
                        m);
            } else {
                return new SaikuLevel(level.getName(), level.getUniqueName(), level.getCaption(),
                        level.getDescription(), level.getDimension().getUniqueName(),
                        level.getHierarchy().getUniqueName(), level.isVisible(), null, null);
            }
        } catch (ClassNotFoundException e) {
            return new SaikuLevel(level.getName(), level.getUniqueName(), level.getCaption(),
                    level.getDescription(), level.getDimension().getUniqueName(),
                    level.getHierarchy().getUniqueName(), level.isVisible(), null, null);
        }

    } catch (Exception e) {
        throw new SaikuServiceException("Cannot convert level: " + level, e);
    }
}

---

From source file:org.apache.hama.util.ReflectionUtils.java

/**
 * Create an instance with corresponded class and object values supplied.
 * Constructor// w w  w. j a  v  a  2  s .  c  om
 * 
 * @param theClass supplies instance to be created.
 * @param values are parameters applied when instance is created.
 */
@SuppressWarnings({ "unchecked", "rawtypes" })
public static <T> T newInstance(Class<T> theClass, Object[] values) {
    T result;
    try {
        Constructor<T> meth = (Constructor<T>) CONSTRUCTOR_CACHE.get(theClass);
        if (null == meth) {
            Class[] parameters = new Class[values.length];
            int idx = 0;
            for (Object value : values) {
                parameters[idx++] = value.getClass();
            }
            meth = theClass.getDeclaredConstructor(parameters);
            meth.setAccessible(true);
            CONSTRUCTOR_CACHE.put(theClass, meth);
        }
        result = meth.newInstance(values);
    } catch (Exception e) {
        throw new RuntimeException(e);
    }
    return result;

}

---

From source file:org.cobaltians.cobalt.font.CobaltFontManager.java

/**
 * Initializes and returns a font drawable with a font icon identifier, color, text size and padding
 * @param context the activity context//from  ww w  .ja  va 2  s.  c  o m
 * @param identifier the font icon identifier as "font-key font-icon" (i.e.: fa fa-mobile)
 * @param color the text color as a color-int
 * @return a Drawable or null
 */
//* @param textSize the text size in sp
//* @param padding the padding in dp
public static CobaltAbstractFontDrawable getCobaltFontDrawable(Context context, String identifier, int color) {
    mContext = context;
    if (identifier != null) {
        if (identifier.contains(" ")) {
            String[] splitIdentifier = identifier.split(" ");
            String fontName = splitIdentifier[0];
            Class<? extends CobaltAbstractFontDrawable> fontClass = getFonts().get(fontName);
            if (fontClass != null) {
                try {
                    Class[] argsClass = new Class[] { Context.class, String.class, int.class };
                    Object[] arrayArgs = new Object[] { context, splitIdentifier[1], color };
                    Constructor fontConstructor = fontClass.getDeclaredConstructor(argsClass);
                    try {
                        return (CobaltAbstractFontDrawable) fontConstructor.newInstance(arrayArgs);
                    } catch (InstantiationException e) {
                        if (Cobalt.DEBUG)
                            Log.e(TAG, "- getCobaltFontDrawable: exception in Instantiation of fontClass");
                        e.printStackTrace();
                    } catch (IllegalAccessException e) {
                        if (Cobalt.DEBUG)
                            Log.e(TAG, "- getCobaltFontDrawable");
                        e.printStackTrace();
                    } catch (InvocationTargetException e) {
                        if (Cobalt.DEBUG)
                            Log.e(TAG, "- getCobaltFontDrawable");
                        e.printStackTrace();
                    }
                } catch (NoSuchMethodException e) {
                    e.printStackTrace();
                }
            } else if (Cobalt.DEBUG)
                Log.e(TAG, "- getCobaltFontDrawable: no font class found for name " + fontName + ".");
        } else if (Cobalt.DEBUG)
            Log.e(TAG, TAG + " - getCobaltFontDrawable : no space separate in identifier");
    } else if (Cobalt.DEBUG)
        Log.e(TAG, TAG + " - getCobaltFontDrawable: identifier for icon is null");

    return null;
}

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From source file:org.projectforge.common.BeanHelper.java

public static Object newInstance(final Class<?> clazz) {
    Constructor<?> constructor = null;
    try {//ww  w. j a v  a2 s.  co m
        constructor = clazz.getDeclaredConstructor(new Class[0]);
    } catch (final SecurityException ex) {
        logInstantiationException(ex, clazz);
    } catch (final NoSuchMethodException ex) {
        logInstantiationException(ex, clazz);
    }
    if (constructor == null) {
        try {
            return clazz.newInstance();
        } catch (final InstantiationException ex) {
            logInstantiationException(ex, clazz);
        } catch (final IllegalAccessException ex) {
            logInstantiationException(ex, clazz);
        }
        return null;
    }
    constructor.setAccessible(true);
    try {
        return constructor.newInstance();
    } catch (final IllegalArgumentException ex) {
        logInstantiationException(ex, clazz);
    } catch (final InstantiationException ex) {
        logInstantiationException(ex, clazz);
    } catch (final IllegalAccessException ex) {
        logInstantiationException(ex, clazz);
    } catch (final InvocationTargetException ex) {
        logInstantiationException(ex, clazz);
    }
    return null;
}

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