Example usage for java.lang.reflect ParameterizedType getActualTypeArguments

List of usage examples for java.lang.reflect ParameterizedType getActualTypeArguments

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Introduction

In this page you can find the example usage for java.lang.reflect ParameterizedType getActualTypeArguments.

Prototype

Type[] getActualTypeArguments();

Source Link

Document

Returns an array of Type objects representing the actual type arguments to this type.

Usage

From source file:org.sleeksnap.ScreenSnapper.java

/**
 * Gets a filter's parent class type//from  ww  w  . j  a  v a2  s .  c  o  m
 * 
 * @param filter
 * @return The class representing the filter's upload type
 */
@SuppressWarnings("unchecked")
public Class<? extends Upload> getFilterType(final UploadFilter<?> filter) {
    // Find the uploader type
    final Type[] types = filter.getClass().getGenericInterfaces();
    for (final Type type : types) {
        if (type instanceof ParameterizedType) {
            final ParameterizedType parameterizedType = (ParameterizedType) type;
            if (parameterizedType.getRawType() == UploadFilter.class) {
                return (Class<? extends Upload>) parameterizedType.getActualTypeArguments()[0];
            }
        }
    }
    throw new RuntimeException("Attempted to load invalid filter!");
}

From source file:com.datatorrent.stram.plan.logical.LogicalPlan.java

public static Type getPortType(Field f) {
    if (f.getGenericType() instanceof ParameterizedType) {
        ParameterizedType t = (ParameterizedType) f.getGenericType();
        //LOG.debug("Field type is parameterized: " + Arrays.asList(t.getActualTypeArguments()));
        //LOG.debug("rawType: " + t.getRawType()); // the port class
        Type typeArgument = t.getActualTypeArguments()[0];
        if (typeArgument instanceof Class) {
            return typeArgument;
        } else if (typeArgument instanceof TypeVariable) {
            TypeVariable<?> tv = (TypeVariable<?>) typeArgument;
            LOG.debug("bounds: " + Arrays.asList(tv.getBounds()));
            // variable may contain other variables, java.util.Map<java.lang.String, ? extends T2>
            return tv.getBounds()[0];
        } else if (typeArgument instanceof GenericArrayType) {
            LOG.debug("type {} is of GenericArrayType", typeArgument);
            return typeArgument;
        } else if (typeArgument instanceof WildcardType) {
            LOG.debug("type {} is of WildcardType", typeArgument);
            return typeArgument;
        } else if (typeArgument instanceof ParameterizedType) {
            return typeArgument;
        } else {//  ww w .ja  va 2s .  c o m
            LOG.error("Type argument is of expected type {}", typeArgument);
            return null;
        }
    } else {
        // ports are always parameterized
        LOG.error("No type variable: {}, typeParameters: {}", f.getType(),
                Arrays.asList(f.getClass().getTypeParameters()));
        return null;
    }
}

From source file:com.flexoodb.engines.FlexJAXBDBDataEngine2.java

private void reviveObject(String parentid, Object o, Connection conn, String prefix, boolean revivechildren)
        throws Exception {
    Vector v = new Vector();
    try {/*  www .  j  a va  2  s  . c  om*/
        Class c = o.getClass();

        Method[] methods = c.getMethods();

        for (int i = 0; i < methods.length; i++) {
            Method method = methods[i];

            if (method.getName().startsWith("get") && method.getReturnType() != null
                    && !method.getReturnType().getSimpleName().equals("Class")) {

                Class ret = method.getReturnType();

                if (ret.getSimpleName().equals("List")) {
                    Object[] args = null;

                    List list = (ArrayList) method.invoke(o, args);

                    ParameterizedType t = (ParameterizedType) method.getGenericReturnType();
                    Type type = t.getActualTypeArguments()[0];
                    String[] s = ("" + type).split(" ");
                    String classname = s[1].substring(s[1].lastIndexOf(".") + 1);

                    String tablename = prefix + classname.toLowerCase();

                    if (checkTable(tablename, conn, true)) {

                        PreparedStatement ps = (PreparedStatement) conn.prepareStatement(
                                "select id,content from " + tablename + " where parentid='" + parentid + "'");
                        ResultSet rec = ps.executeQuery();
                        // check if a record was found
                        while (rec != null && rec.next()) {
                            String id = rec.getString("id");
                            //Object o2 = _flexutils.getObject(rec.getString("content"),Class.forName(s[1]));
                            Object o2 = _flexutils.getObject(rec.getString("content"),
                                    ClassLoader.getSystemClassLoader().loadClass(s[1]));
                            if (id != null && o2 != null && !id.equalsIgnoreCase(parentid)) {
                                list.add(o2);
                            }
                        }
                    }
                } else if (!ret.getName().startsWith("java")
                        && !ret.getSimpleName().toLowerCase().endsWith("byte[]")
                        && !ret.getSimpleName().toLowerCase().equals("int")) // if complex
                {
                    String tablename = prefix + ret.getSimpleName().toLowerCase();

                    if (checkTable(tablename, conn, true)) {
                        PreparedStatement ps = (PreparedStatement) conn
                                .prepareStatement("select distinct id,content from " + tablename
                                        + " where parentid='" + parentid + "'");
                        ResultSet rec = ps.executeQuery();
                        // check if a record was found

                        if (rec != null && rec.next()) {
                            String id = rec.getString("id");
                            Object o2 = _flexutils.getObject(rec.getString("content"), ret);

                            if (o2 != null && !id.equalsIgnoreCase(parentid)) {
                                String setmethod = "set" + method.getName().substring(3);
                                Object[] args = new Object[1];
                                args[0] = o2;
                                Class[] cls = new Class[1];
                                cls[0] = o2.getClass();
                                Method met = c.getMethod(setmethod, cls);
                                met.invoke(o, args);

                                if (revivechildren) {
                                    reviveObject(id, o2, conn, prefix, revivechildren);
                                }
                                //System.out.println(">>> "+o2+" added!");
                            }
                            /*if (rec.isLast())
                            {
                            break;
                            }*/

                        }
                    }
                }
            }
        }
    } catch (Exception f) {
        throw f;
    }
}

From source file:com.flexoodb.engines.FlexJAXBDBDataEngine.java

private void reviveObject(String parentid, Object o, Connection conn, String prefix, boolean revivechildren)
        throws Exception {
    Vector v = new Vector();
    try {/*from w  w w.j  a  va 2  s .c o m*/
        Class c = o.getClass();

        Method[] methods = c.getMethods();

        for (int i = 0; i < methods.length; i++) {
            Method method = methods[i];

            if (method.getName().startsWith("get") && method.getReturnType() != null
                    && !method.getReturnType().getSimpleName().equals("Class")) {

                Class ret = method.getReturnType();

                if (ret.getSimpleName().equals("List")) {
                    Object[] args = null;

                    List list = (ArrayList) method.invoke(o, args);

                    ParameterizedType t = (ParameterizedType) method.getGenericReturnType();
                    Type type = t.getActualTypeArguments()[0];
                    String[] s = ("" + type).split(" ");
                    String classname = s[1].substring(s[1].lastIndexOf(".") + 1);

                    String tablename = prefix + classname.toLowerCase();

                    if (checkTable(tablename, conn, true)) {

                        PreparedStatement ps = (PreparedStatement) conn.prepareStatement(
                                "select id,content from " + tablename + " where parentid='" + parentid + "'");
                        ResultSet rec = ps.executeQuery();
                        // check if a record was found
                        while (rec != null && rec.next()) {
                            String id = rec.getString("id");
                            //Object o2 = _flexutils.getObject(rec.getString("content"),Class.forName(s[1]));
                            Object o2 = _flexutils.getObject(rec.getString("content"),
                                    ClassLoader.getSystemClassLoader().loadClass(s[1]));

                            if (id != null && o2 != null && !id.equalsIgnoreCase(parentid)) {
                                list.add(o2);
                            }
                        }
                    }
                } else if (!ret.getName().startsWith("java")
                        && !ret.getSimpleName().toLowerCase().endsWith("byte[]")
                        && !ret.getSimpleName().toLowerCase().equals("int")) // if complex
                {
                    String tablename = prefix + ret.getSimpleName().toLowerCase();

                    if (checkTable(tablename, conn, true)) {
                        PreparedStatement ps = (PreparedStatement) conn
                                .prepareStatement("select distinct id,content from " + tablename
                                        + " where parentid='" + parentid + "'");
                        ResultSet rec = ps.executeQuery();
                        // check if a record was found

                        if (rec != null && rec.next()) {
                            String id = rec.getString("id");
                            Object o2 = _flexutils.getObject(rec.getString("content"), ret);

                            if (o2 != null && !id.equalsIgnoreCase(parentid)) {
                                String setmethod = "set" + method.getName().substring(3);
                                Object[] args = new Object[1];
                                args[0] = o2;
                                Class[] cls = new Class[1];
                                cls[0] = o2.getClass();
                                Method met = c.getMethod(setmethod, cls);
                                met.invoke(o, args);

                                if (revivechildren) {
                                    reviveObject(id, o2, conn, prefix, revivechildren);
                                }
                                //System.out.println(">>> "+o2+" added!");
                            }
                            /*if (rec.isLast())
                            {
                            break;
                            }*/

                        }
                    }
                }
            }
        }
    } catch (Exception f) {
        throw f;
    }
}

From source file:net.firejack.platform.core.utils.Factory.java

public Class getGenericParameterClass(Class actualClass, Class genericClass, int parameterIndex) {
    if (!genericClass.isAssignableFrom(actualClass) || genericClass.equals(actualClass)) {
        throw new IllegalArgumentException(
                "Class " + genericClass.getName() + " is not a superclass of " + actualClass.getName() + ".");
    }//from  ww  w .  j ava2  s .c  o  m

    Stack<ParameterizedType> types = new Stack<ParameterizedType>();

    Class clazz = actualClass;

    while (true) {
        Type currentType = genericClass.isInterface() ? getGenericInterface(clazz, genericClass)
                : clazz.getGenericSuperclass();

        Type rawType;
        if (currentType instanceof ParameterizedType) {
            ParameterizedType type = (ParameterizedType) currentType;
            types.push(type);
            rawType = type.getRawType();
        } else {
            types.clear();
            rawType = currentType;
        }

        if (!rawType.equals(genericClass)) {
            clazz = (Class) rawType;
        } else {
            break;
        }
    }

    if (types.isEmpty()) {
        return (Class) genericClass.getTypeParameters()[parameterIndex].getGenericDeclaration();
    }

    Type result = types.pop().getActualTypeArguments()[parameterIndex];

    while (result instanceof TypeVariable && !types.empty()) {
        int actualArgumentIndex = getParameterTypeDeclarationIndex((TypeVariable) result);
        ParameterizedType type = types.pop();
        result = type.getActualTypeArguments()[actualArgumentIndex];
    }

    if (result instanceof TypeVariable) {
        throw new IllegalStateException("Unable to resolve type variable " + result + "."
                + " Try to replace instances of parametrized class with its non-parameterized subtype.");
    }

    if (result instanceof ParameterizedType) {
        result = ((ParameterizedType) result).getRawType();
    }

    if (result == null) {
        throw new IllegalStateException(
                "Unable to determine actual parameter type for " + actualClass.getName() + ".");
    }

    if (!(result instanceof Class)) {
        throw new IllegalStateException(
                "Actual parameter type for " + actualClass.getName() + " is not a Class.");
    }

    return (Class) result;
}

From source file:org.LexGrid.LexBIG.caCore.web.util.LexEVSHTTPUtils.java

private String getParamatarizedListType(Field field) {
    String fieldTypeName = null;//from  ww  w. jav a2s .  c  o m
    Type type = field.getGenericType();

    //if its a Parameterized List, see if we can dig out the type
    if (type != null && type instanceof ParameterizedType) {
        ParameterizedType pt = (ParameterizedType) type;
        if (pt.getActualTypeArguments().length > 0) {
            Type collectionType = pt.getActualTypeArguments()[0];
            if (collectionType instanceof Class) {
                fieldTypeName = ((Class) collectionType).getName();
            }
        }
    }
    return fieldTypeName;
}

From source file:edu.ku.brc.specify.tools.datamodelgenerator.DatamodelGenerator.java

/**
 * @param method/*from   ww  w .j  a va2 s .  c  om*/
 * @return
 */
protected String getReturnType(final Method method) {
    Class<?> classObj = method.getReturnType();
    // If there is a better way, PLEASE help me!
    if (classObj == Set.class) {
        ParameterizedType type = (ParameterizedType) method.getGenericReturnType();
        for (Type t : type.getActualTypeArguments()) {
            String cls = t.toString();
            return cls.substring(6, cls.length());
        }
    }
    return classObj.getName();
}

From source file:com.gatf.generator.core.GatfTestGeneratorMojo.java

@SuppressWarnings({ "unchecked", "rawtypes" })
private Object getObject(Class claz, List<Type> heirarchies) throws Exception {

    if (claz.isEnum())
        return claz.getEnumConstants()[0];

    if (isMap(claz)) {
        return getMapValue(claz, claz.getTypeParameters(), heirarchies);
    } else if (isCollection(claz)) {
        return getListSetValue(claz, claz.getTypeParameters(), heirarchies);
    } else if (claz.isInterface() || Modifier.isAbstract(claz.getModifiers())) {
        return null;
    }/*  w w w .  j a  va  2s.c  o m*/

    if (heirarchies.contains(claz) || heirarchies.size() >= 2)
        return null;
    heirarchies.add(claz);

    Constructor cons = null;
    try {
        cons = claz.getConstructor(new Class[] {});
    } catch (Exception e) {
        getLog().error("No public no-args constructor found for class " + claz.getName());
        return null;
    }

    Object object = cons.newInstance(new Object[] {});
    List<Field> allFields = getAllFields(claz);

    for (Field field : allFields) {

        if (Modifier.isStatic(field.getModifiers()))
            continue;

        if (!field.isAccessible()) {
            field.setAccessible(true);
        }

        List<Type> fheirlst = new ArrayList<Type>(heirarchies);

        if (isDebugEnabled())
            getLog().info("Parsing Class " + getHeirarchyStr(fheirlst) + " field " + field.getName() + " type "
                    + field.getType().equals(boolean.class));

        if (isPrimitive(field.getType())) {
            field.set(object, getPrimitiveValue(field.getType()));
        } else if (isMap(field.getType())) {
            ParameterizedType type = (ParameterizedType) field.getGenericType();
            field.set(object, getMapValue(field.getType(), type.getActualTypeArguments(), fheirlst));
        } else if (isCollection(field.getType())) {
            ParameterizedType type = (ParameterizedType) field.getGenericType();
            field.set(object, getListSetValue(field.getType(), type.getActualTypeArguments(), fheirlst));
        } else if (!claz.equals(field.getType())) {
            Object fieldval = getObject(field.getType(), fheirlst);
            field.set(object, fieldval);
        } else if (claz.equals(field.getType())) {
            if (isDebugEnabled())
                getLog().info("Ignoring recursive fields...");
        }
    }
    return object;
}

From source file:com.flexoodb.engines.FlexJAXBMappedDBDataEngine.java

private void reviveObject(String parentid, FlexContainer parent, Connection conn, String prefix,
        boolean revivechildren) throws Exception {
    Vector v = new Vector();
    try {/* w ww. j  a v  a2s . c  om*/
        Class c = parent.getObject().getClass();

        Method[] methods = c.getMethods();
        for (int i = 0; i < methods.length; i++) {
            Method method = methods[i];

            if (method.getName().startsWith("get") && method.getReturnType() != null
                    && !method.getReturnType().getSimpleName().equals("Class")) {

                Class ret = method.getReturnType();
                if (ret.getSimpleName().equals("List")) {
                    Object[] args = null;

                    //List list = (ArrayList) method.invoke(parent.getObject(), args);
                    List list = new Vector<FlexContainer>();

                    ParameterizedType t = (ParameterizedType) method.getGenericReturnType();
                    Type type = t.getActualTypeArguments()[0];
                    String[] s = ("" + type).split(" ");
                    String classname = s[1].substring(s[1].lastIndexOf(".") + 1);

                    String tablename = classname.toLowerCase();

                    tablename = tablename.endsWith("type")
                            ? tablename.substring(0, tablename.lastIndexOf("type"))
                            : tablename;

                    //FlexElement element = _elements.get(prefix+tablename);
                    FlexElement element = _elements.get(tablename);

                    String idcolumn = element.getAttribute("idcolumn").getValue();
                    String realtablename = element.getAttribute("realtablename").getValue();
                    String parentidcolumn = element.getAttribute("parentidcolumn").getValue();
                    boolean includeidcolumns = element.getAttribute("includeidcolumns").getValue() == null
                            ? false
                            : (element.getAttribute("includeidcolumns").getValue().equalsIgnoreCase("true"));

                    //System.out.println("t:"+tablename+" "+realtablename+"  >"+"select * from "+prefix+((realtablename!=null)?realtablename:tablename.toLowerCase())+" where "+parentidcolumn+"=?"+"<");

                    FlexElement idelement = element.getElementByName(parentidcolumn);
                    PreparedStatement ps = (PreparedStatement) conn.prepareStatement("select * from " + prefix
                            + ((realtablename != null) ? realtablename : tablename.toLowerCase()) + " where "
                            + parentidcolumn + "=?");
                    //PreparedStatement ps = (PreparedStatement) conn.prepareStatement("select * from "+((realtablename!=null)?realtablename:tablename.toLowerCase())+" where "+parentidcolumn+"=?");

                    if (idelement.getType().equals("string")) {
                        ps.setString(1, parentid);
                    } else {
                        ps.setInt(1, Integer.parseInt(parentid));
                    }
                    //System.out.println(">> query:"+ps.toString());

                    ResultSet rec = ps.executeQuery();
                    RecordSet res = new RecordSet(rec);

                    // check if a record was found
                    while (res != null && res.next()) {

                        //String id = res.getString("id");
                        String id = res.getString(idcolumn);

                        //Object o2 = _flexutils.getObject(FlexUtils.getRDBMSRecordAsXML(tablename, res, idcolumn, parentidcolumn,includeidcolumns),Class.forName(s[1]));
                        Object o2 = _flexutils
                                .getObject(
                                        FlexUtils.getRDBMSRecordAsXML(tablename, res, idcolumn, parentidcolumn,
                                                includeidcolumns),
                                        ClassLoader.getSystemClassLoader().loadClass(s[1]));

                        if (id != null && o2 != null) {
                            //instead of adding this in the object's list we add it in the parent flex's
                            //list.add(o2);

                            FlexContainer fo = new FlexContainer(o2);
                            fo.setId(id);
                            fo.setParentId(parentid);

                            list.add(fo);

                            // then we check if this guy has children! enabling this will cause a loop of death
                            //reviveObject(id,o2,conn);
                        }
                    }

                    // finally we add it to the parent flex
                    parent.addChildren(tablename, list);

                    //System.out.println(">>>"+parent.getChildren());

                } else if (!ret.getName().startsWith("java")
                        && !ret.getSimpleName().toLowerCase().endsWith("byte[]")
                        && !ret.getSimpleName().toLowerCase().equals("int")) // if complex
                {
                    String tablename = ret.getSimpleName().toLowerCase();

                    tablename = tablename.endsWith("type")
                            ? tablename.substring(0, tablename.lastIndexOf("type"))
                            : tablename;

                    FlexElement element = _elements.get(tablename);
                    String idcolumn = element.getAttribute("idcolumn").getValue();
                    String realtablename = element.getAttribute("realtablename").getValue();
                    String parentidcolumn = element.getAttribute("parentidcolumn").getValue();
                    boolean includeidcolumns = element.getAttribute("includeidcolumns").getValue() == null
                            ? false
                            : (element.getAttribute("includeidcolumns").getValue().equalsIgnoreCase("true"));

                    FlexElement idelement = element.getElementByName(parentidcolumn);
                    PreparedStatement ps = (PreparedStatement) conn.prepareStatement("select * from " + prefix
                            + ((realtablename != null) ? realtablename : tablename.toLowerCase()) + " where "
                            + parentidcolumn + "="
                            + (idelement.getType().equals("string") ? ("'" + parentid + "'") : parentid));
                    ResultSet rec = ps.executeQuery();
                    // check if a record was found

                    RecordSet res = new RecordSet(rec);
                    if (res != null && res.size() > 0) {
                        //String id = rec.getString("id");
                        String id = res.getString(idcolumn);

                        Object o2 = _flexutils.getObject(FlexUtils.getRDBMSRecordAsXML(tablename, res, idcolumn,
                                parentidcolumn, includeidcolumns), ret);
                        if (o2 != null) {
                            String setmethod = "set" + method.getName().substring(3);
                            Object[] args = new Object[1];
                            args[0] = o2;
                            Class[] cls = new Class[1];
                            cls[0] = o2.getClass();
                            Method met = c.getMethod(setmethod, cls);
                            met.invoke(parent.getObject(), args);

                            /*if (revivechildren)
                            {
                            reviveObject(id,o2,conn,prefix,revivechildren);
                            }*/
                        }

                        if (rec.last()) {
                            break;
                        }

                    }
                }
            }
        }
    } catch (Exception f) {
        throw f;
    }
}

From source file:org.broadleafcommerce.openadmin.server.service.persistence.module.BasicPersistenceModule.java

protected Class<?> getMapFieldType(Serializable instance, FieldManager fieldManager, Property property) {
    Class<?> returnType = null;
    Field field = fieldManager.getField(instance.getClass(),
            property.getName().substring(0, property.getName().indexOf(FieldManager.MAPFIELDSEPARATOR)));
    java.lang.reflect.Type type = field.getGenericType();
    if (type instanceof ParameterizedType) {
        ParameterizedType pType = (ParameterizedType) type;
        Class<?> clazz = (Class<?>) pType.getActualTypeArguments()[1];
        Class<?>[] entities = persistenceManager.getDynamicEntityDao()
                .getAllPolymorphicEntitiesFromCeiling(clazz);
        if (!ArrayUtils.isEmpty(entities)) {
            returnType = entities[entities.length - 1];
        }/*w  w  w.  ja  v a2s  . co  m*/
    }
    return returnType;
}