/*
    * Licensed to the Apache Software Foundation (ASF) under one or more
    * contributor license agreements.  See the NOTICE file distributed with
    * this work for additional information regarding copyright ownership.
    * The ASF licenses this file to You under the Apache License, Version 2.0
    * (the "License"); you may not use this file except in compliance with
    * the License.  You may obtain a copy of the License at
    *
    *      https://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package org.apache.commons.validator;
  
  import java.io.Serializable;
  import java.lang.reflect.InvocationTargetException;
  import java.util.ArrayList;
  import java.util.Collection;
  import java.util.Collections;
  import java.util.HashMap;
  import java.util.List;
  import java.util.Map;
  import java.util.Map.Entry;
  import java.util.StringTokenizer;
  
  import org.apache.commons.beanutils.PropertyUtils;
  import org.apache.commons.collections.FastHashMap; // DEPRECATED
  import org.apache.commons.validator.util.ValidatorUtils;
  
  /**
   * This contains the list of pluggable validators to run on a field and any
   * message information and variables to perform the validations and generate
   * error messages.  Instances of this class are configured with a
   * <field> xml element.
   * <p>
   * The use of FastHashMap is deprecated and will be replaced in a future
   * release.
   * </p>
   *
   * @see org.apache.commons.validator.Form
   */
  // TODO mutable non-private fields
  public class Field implements Cloneable, Serializable {
  
      private static final long serialVersionUID = -8502647722530192185L;
  
      /**
       * This is the value that will be used as a key if the {@code Arg}
       * name field has no value.
       */
      private static final String DEFAULT_ARG =
              "org.apache.commons.validator.Field.DEFAULT";
  
      /**
       * This indicates an indexed property is being referenced.
       */
      public static final String TOKEN_INDEXED = "[]";
  
      /**
       * The start of a token.
       */
      protected static final String TOKEN_START = "${";
  
      /**
       * The end of a token.
       */
      protected static final String TOKEN_END = "}";
  
      /**
       * A Variable token.
       */
      protected static final String TOKEN_VAR = "var:";
  
      /**
       * The Field's property name.
       */
      protected String property;
  
      /**
       * The Field's indexed property name.
       */
      protected String indexedProperty;
  
      /**
       * The Field's indexed list property name.
       */
      protected String indexedListProperty;
  
      /**
       * The Field's unique key.
       */
      protected String key;
  
      /**
       * A comma separated list of validator's this field depends on.
      */
     protected String depends;
 
     /**
      * The Page Number
      */
     protected volatile int page;
 
     /**
      * The flag that indicates whether scripting should be generated
      * by the client for client-side validation.
      * @since 1.4
      */
     protected volatile boolean clientValidation = true;
 
     /**
      * The order of the Field in the Form.
      */
     protected volatile int fieldOrder;
 
     /**
      * Internal representation of this.depends String as a List.  This List
      * gets updated whenever setDepends() gets called.  This List is
      * synchronized so a call to setDepends() (which clears the List) won't
      * interfere with a call to isDependency().
      */
     private final List<String> dependencyList = Collections.synchronizedList(new ArrayList<>());
 
     /**
      * @deprecated Subclasses should use getVarMap() instead.
      */
     @Deprecated
     protected FastHashMap hVars = new FastHashMap(); // <String, Var>
 
     /**
      * @deprecated Subclasses should use getMsgMap() instead.
      */
     @Deprecated
     protected FastHashMap hMsgs = new FastHashMap(); // <String, Msg>
 
     /**
      * Holds Maps of arguments.  args[0] returns the Map for the first
      * replacement argument.  Start with a 0 length array so that it will
      * only grow to the size of the highest argument position.
      * @since 1.1
      */
     @SuppressWarnings("unchecked") // cannot instantiate generic array, so have to assume this is OK
     protected Map<String, Arg>[] args = new Map[0];
 
     /**
      * Constructs a new instance.
      */
     public Field() {
         // empty
     }
 
     /**
      * Add an {@code Arg} to the replacement argument list.
      *
      * @param arg Validation message's argument.
      * @since 1.1
      */
     public void addArg(final Arg arg) {
         // TODO this first if check can go away after arg0, etc. are removed from dtd
         if (arg == null || arg.getKey() == null || arg.getKey().isEmpty()) {
             return;
         }
 
         determineArgPosition(arg);
         ensureArgsCapacity(arg);
 
         Map<String, Arg> argMap = args[arg.getPosition()];
         if (argMap == null) {
             argMap = new HashMap<>();
             args[arg.getPosition()] = argMap;
         }
 
         final String name = arg.getName();
         argMap.put(name != null ? name : DEFAULT_ARG, arg);
     }
 
     /**
      * Add a {@code Msg} to the {@code Field}.
      * @param msg A validation message.
      */
     public void addMsg(final Msg msg) {
         getMsgMap().put(msg.getName(), msg);
     }
 
     /**
      * Add a {@code Var}, based on the values passed in, to the
      * {@code Field}.
      * @param name Name of the validation.
      * @param value The Argument's value.
      * @param jsType The JavaScript type.
      */
     public void addVar(final String name, final String value, final String jsType) {
         this.addVar(new Var(name, value, jsType));
     }
 
     /**
      * Add a {@code Var} to the {@code Field}.
      * @param v The Validator Argument.
      */
     public void addVar(final Var v) {
         getVarMap().put(v.getName(), v);
     }
 
     /**
      * Creates and returns a copy of this object.
      * @return A copy of the Field.
      */
     @Override
     public Object clone() {
         Field field = null;
         try {
             field = (Field) super.clone();
         } catch (final CloneNotSupportedException e) {
             throw new UnsupportedOperationException(e.toString(), e);
         }
 
         @SuppressWarnings("unchecked") // empty array always OK; cannot check this at compile time
         final Map<String, Arg>[] tempMap = new Map[args.length];
         field.args = tempMap;
         for (int i = 0; i < args.length; i++) {
             if (args[i] == null) {
                 continue;
             }
 
             final Map<String, Arg> argMap = new HashMap<>(args[i]);
             argMap.forEach((validatorName, arg) -> argMap.put(validatorName, (Arg) arg.clone()));
             field.args[i] = argMap;
         }
 
         field.hVars = ValidatorUtils.copyFastHashMap(hVars);
         field.hMsgs = ValidatorUtils.copyFastHashMap(hMsgs);
 
         return field;
     }
 
     /**
      * Calculate the position of the Arg
      */
     private void determineArgPosition(final Arg arg) {
 
         final int position = arg.getPosition();
 
         // position has been explicitly set
         if (position >= 0) {
             return;
         }
 
         // first arg to be added
         if (args == null || args.length == 0) {
             arg.setPosition(0);
             return;
         }
 
         // determine the position of the last argument with
         // the same name or the last default argument
         final String keyName = arg.getName() == null ? DEFAULT_ARG : arg.getName();
         int lastPosition = -1;
         int lastDefault = -1;
         for (int i = 0; i < args.length; i++) {
             if (args[i] != null && args[i].containsKey(keyName)) {
                 lastPosition = i;
             }
             if (args[i] != null && args[i].containsKey(DEFAULT_ARG)) {
                 lastDefault = i;
             }
         }
 
         if (lastPosition < 0) {
             lastPosition = lastDefault;
         }
 
         // allocate the next position
         arg.setPosition(++lastPosition);
 
     }
 
     /**
      * Ensures that the args array can hold the given arg.  Resizes the array as
      * necessary.
      * @param arg Determine if the args array is long enough to store this arg's
      * position.
      */
     private void ensureArgsCapacity(final Arg arg) {
         if (arg.getPosition() >= args.length) {
             @SuppressWarnings("unchecked") // cannot check this at compile time, but it is OK
             final
             Map<String, Arg>[] newArgs = new Map[arg.getPosition() + 1];
             System.arraycopy(args, 0, newArgs, 0, args.length);
             args = newArgs;
         }
     }
 
     /**
      * Generate correct {@code key} value.
      */
     public void generateKey() {
         if (isIndexed()) {
             key = indexedListProperty + TOKEN_INDEXED + "." + property;
         } else {
             key = property;
         }
     }
 
     /**
      * Gets the default {@code Arg} object at the given position.
      * @param position Validation message argument's position.
      * @return The default Arg or null if not found.
      * @since 1.1
      */
     public Arg getArg(final int position) {
         return this.getArg(DEFAULT_ARG, position);
     }
 
     /**
      * Gets the {@code Arg} object at the given position.  If the key
      * finds a {@code null} value then the default value will be
      * retrieved.
      * @param key The name the Arg is stored under.  If not found, the default
      * Arg for the given position (if any) will be retrieved.
      * @param position The Arg number to find.
      * @return The Arg with the given name and position or null if not found.
      * @since 1.1
      */
     public Arg getArg(final String key, final int position) {
         if (position >= args.length || args[position] == null) {
             return null;
         }
 
         final Arg arg = args[position].get(key);
 
         // Didn't find default arg so exit, otherwise we would get into
         // infinite recursion
         if (arg == null && key.equals(DEFAULT_ARG)) {
             return null;
         }
 
         return arg == null ? this.getArg(position) : arg;
     }
 
     /**
      * Gets the Args for the given validator name.
      * @param key The validator's args to retrieve.
      * @return An Arg[] sorted by the Args' positions (for example, the Arg at index 0
      * has a position of 0).
      * @since 1.1.1
      */
     public Arg[] getArgs(final String key) {
         final Arg[] argList = new Arg[args.length];
 
         for (int i = 0; i < args.length; i++) {
             argList[i] = this.getArg(key, i);
         }
 
         return argList;
     }
 
     /**
      * Gets an unmodifiable {@code List} of the dependencies in the same
      * order they were defined in parameter passed to the setDepends() method.
      * @return A list of the Field's dependencies.
      */
     public List<String> getDependencyList() {
         return Collections.unmodifiableList(dependencyList);
     }
 
     /**
      * Gets the validation rules for this field as a comma separated list.
      * @return A comma separated list of validator names.
      */
     public String getDepends() {
         return depends;
     }
 
     /**
      * Gets the position of the {@code Field} in the validation list.
      * @return The field position.
      */
     public int getFieldOrder() {
         return fieldOrder;
     }
 
     /**
      * Gets the indexed property name of the field.  This
      * is the method name that will return an array or a
      * {@link Collection} used to retrieve the
      * list and then loop through the list performing the specified
      * validations.
      * @return The field's indexed List property name.
      */
     public String getIndexedListProperty() {
         return indexedListProperty;
     }
 
     /**
      * Gets the indexed property name of the field.  This
      * is the method name that can take an {@code int} as
      * a parameter for indexed property value retrieval.
      * @return The field's indexed property name.
      */
     public String getIndexedProperty() {
         return indexedProperty;
     }
 
     /**
      * Returns an indexed property from the object we're validating.
      *
      * @param bean The bean to extract the indexed values from.
      * @throws ValidatorException If there's an error looking up the property
      * or, the property found is not indexed.
      */
     Object[] getIndexedProperty(final Object bean) throws ValidatorException {
         Object indexProp = null;
 
         try {
             indexProp = PropertyUtils.getProperty(bean, getIndexedListProperty());
 
         } catch (IllegalAccessException | InvocationTargetException | NoSuchMethodException e) {
             throw new ValidatorException(e.getMessage());
         }
 
         if (indexProp instanceof Collection) {
             return ((Collection<?>) indexProp).toArray();
 
         }
         if (indexProp.getClass().isArray()) {
             return (Object[]) indexProp;
 
         }
         throw new ValidatorException(getKey() + " is not indexed");
 
     }
 
     /**
      * Returns the size of an indexed property from the object we're validating.
      *
      * @param bean The bean to extract the indexed values from.
      * @throws ValidatorException If there's an error looking up the property
      * or, the property found is not indexed.
      */
     private int getIndexedPropertySize(final Object bean) throws ValidatorException {
         Object indexProp = null;
 
         try {
             indexProp = PropertyUtils.getProperty(bean, getIndexedListProperty());
 
         } catch (IllegalAccessException | InvocationTargetException | NoSuchMethodException e) {
             throw new ValidatorException(e.getMessage());
         }
 
         if (indexProp == null) {
             return 0;
         }
         if (indexProp instanceof Collection) {
             return ((Collection<?>) indexProp).size();
         }
         if (indexProp.getClass().isArray()) {
             return ((Object[]) indexProp).length;
         }
         throw new ValidatorException(getKey() + " is not indexed");
 
     }
 
     /**
      * Gets a unique key based on the property and indexedProperty fields.
      * @return a unique key for the field.
      */
     public String getKey() {
         if (key == null) {
             generateKey();
         }
 
         return key;
     }
 
     /**
      * Retrieve a message object.
      * @param key Validation key.
      * @return A validation message for a specified validator.
      * @since 1.1.4
      */
     public Msg getMessage(final String key) {
         return getMsgMap().get(key);
     }
 
     /**
      * The {@code Field}'s messages are returned as an
      * unmodifiable {@link Map}.
      * @return Map of validation messages for the field.
      * @since 1.1.4
      */
     public Map<String, Msg> getMessages() {
         return Collections.unmodifiableMap(getMsgMap());
     }
 
     /**
      * Retrieve a message value.
      * @param key Validation key.
      * @return A validation message for a specified validator.
      */
     public String getMsg(final String key) {
         final Msg msg = getMessage(key);
         return msg == null ? null : msg.getKey();
     }
 
     /**
      * Returns a Map of String Msg names to Msg objects.
      * @return A Map of the Field's messages.
      * @since 1.2.0
      */
     @SuppressWarnings("unchecked") // FastHashMap does not support generics
     protected Map<String, Msg> getMsgMap() {
         return hMsgs;
     }
 
     /**
      * Gets the page value that the Field is associated with for
      * validation.
      * @return The page number.
      */
     public int getPage() {
         return page;
     }
 
     /**
      * Gets the property name of the field.
      * @return The field's property name.
      */
     public String getProperty() {
         return property;
     }
 
     /**
      * Retrieve a variable.
      * @param mainKey The Variable's key
      * @return the Variable
      */
     public Var getVar(final String mainKey) {
         return getVarMap().get(mainKey);
     }
 
     /**
      * Returns a Map of String Var names to Var objects.
      * @return A Map of the Field's variables.
      * @since 1.2.0
      */
     @SuppressWarnings("unchecked") // FastHashMap does not support generics
     protected Map<String, Var> getVarMap() {
         return hVars;
     }
 
     /**
      * The {@code Field}'s variables are returned as an
      * unmodifiable {@link Map}.
      * @return the Map of Variable's for a Field.
      */
     public Map<String, Var> getVars() {
         return Collections.unmodifiableMap(getVarMap());
     }
 
     /**
      * Retrieve a variable's value.
      * @param mainKey The Variable's key
      * @return the Variable's value
      */
     public String getVarValue(final String mainKey) {
         String value = null;
 
         final Var v = getVarMap().get(mainKey);
         if (v != null) {
             value = v.getValue();
         }
 
         return value;
     }
 
     /**
      * Called when a validator name is used in a depends clause but there is
      * no know ValidatorAction configured for that name.
      * @param name The name of the validator in the depends list.
      * @throws ValidatorException
      */
     private void handleMissingAction(final String name) throws ValidatorException {
         throw new ValidatorException("No ValidatorAction named " + name
                 + " found for field " + getProperty());
     }
 
     /**
      * Determines whether client-side scripting should be generated
      * for this field. The default is {@code true}
      * @return {@code true} for scripting; otherwise false
      * @see #setClientValidation(boolean)
      * @since 1.4
      */
     public boolean isClientValidation() {
         return clientValidation;
     }
 
     /**
      * Checks if the validator is listed as a dependency.
      * @param validatorName Name of the validator to check.
      * @return Whether the field is dependant on a validator.
      */
     public boolean isDependency(final String validatorName) {
         return dependencyList.contains(validatorName);
     }
 
     /**
      * If there is a value specified for the indexedProperty field then
      * {@code true} will be returned.  Otherwise, it will be
      * {@code false}.
      * @return Whether the Field is indexed.
      */
     public boolean isIndexed() {
         return indexedListProperty != null && !indexedListProperty.isEmpty();
     }
 
     /**
      * Replace constants with values in fields and process the depends field
      * to create the dependency {@link Map}.
      */
     void process(final Map<String, String> globalConstants, final Map<String, String> constants) {
         hMsgs.setFast(false);
         hVars.setFast(true);
 
         generateKey();
 
         // Process FormSet Constants
         for (final Entry<String, String> entry : constants.entrySet()) {
             final String key1 = entry.getKey();
             final String key2 = TOKEN_START + key1 + TOKEN_END;
             final String replaceValue = entry.getValue();
 
             property = ValidatorUtils.replace(property, key2, replaceValue);
 
             processVars(key2, replaceValue);
 
             processMessageComponents(key2, replaceValue);
         }
 
         // Process Global Constants
         for (final Entry<String, String> entry : globalConstants.entrySet()) {
             final String key1 = entry.getKey();
             final String key2 = TOKEN_START + key1 + TOKEN_END;
             final String replaceValue = entry.getValue();
 
             property = ValidatorUtils.replace(property, key2, replaceValue);
 
             processVars(key2, replaceValue);
 
             processMessageComponents(key2, replaceValue);
         }
 
         // Process Var Constant Replacement
         for (final String key1 : getVarMap().keySet()) {
             final String key2 = TOKEN_START + TOKEN_VAR + key1 + TOKEN_END;
             final Var var = getVar(key1);
             final String replaceValue = var.getValue();
 
             processMessageComponents(key2, replaceValue);
         }
 
         hMsgs.setFast(true);
     }
 
     /**
      * Replace the arg {@link Collection} key value with the key/value
      * pairs passed in.
      */
     private void processArg(final String key, final String replaceValue) {
         for (final Map<String, Arg> argMap : args) {
             if (argMap == null) {
                 continue;
             }
             for (final Arg arg : argMap.values()) {
                 if (arg != null) {
                     arg.setKey(ValidatorUtils.replace(arg.getKey(), key, replaceValue));
                 }
             }
         }
     }
 
     /**
      * Replace the args key value with the key/value pairs passed in.
      */
     private void processMessageComponents(final String key, final String replaceValue) {
         final String varKey = TOKEN_START + TOKEN_VAR;
         // Process Messages
         if (key != null && !key.startsWith(varKey)) {
             for (final Msg msg : getMsgMap().values()) {
                 msg.setKey(ValidatorUtils.replace(msg.getKey(), key, replaceValue));
             }
         }
 
         processArg(key, replaceValue);
     }
 
     /**
      * Replace the vars value with the key/value pairs passed in.
      */
     private void processVars(final String key, final String replaceValue) {
         for (final String varKey : getVarMap().keySet()) {
             final Var var = getVar(varKey);
             var.setValue(ValidatorUtils.replace(var.getValue(), key, replaceValue));
         }
 
     }
 
     /**
      * Calls all of the validators that this validator depends on.
      * TODO ValidatorAction should know how to run its own dependencies.
      * @param va Run dependent validators for this action.
      * @param results
      * @param actions
      * @param pos
      * @return true if all dependent validations passed.
      * @throws ValidatorException If there's an error running a validator
      */
     private boolean runDependentValidators(
         final ValidatorAction va,
         final ValidatorResults results,
         final Map<String, ValidatorAction> actions,
         final Map<String, Object> params,
         final int pos)
         throws ValidatorException {
 
         final List<String> dependentValidators = va.getDependencyList();
 
         if (dependentValidators.isEmpty()) {
             return true;
         }
 
         for (final String depend : dependentValidators) {
             final ValidatorAction action = actions.get(depend);
             if (action == null) {
                 handleMissingAction(depend);
             }
 
             if (!validateForRule(action, results, actions, params, pos)) {
                 return false;
             }
         }
 
         return true;
     }
 
     /**
      * Sets the flag that determines whether client-side scripting should
      * be generated for this field.
      * @param clientValidation the scripting flag
      * @see #isClientValidation()
      * @since 1.4
      */
     public void setClientValidation(final boolean clientValidation) {
         this.clientValidation = clientValidation;
     }
 
     /**
      * Sets the validation rules for this field as a comma separated list.
      * @param depends A comma separated list of validator names.
      */
     public void setDepends(final String depends) {
         this.depends = depends;
 
         dependencyList.clear();
 
         final StringTokenizer st = new StringTokenizer(depends, ",");
         while (st.hasMoreTokens()) {
             final String depend = st.nextToken().trim();
 
             if (depend != null && !depend.isEmpty()) {
                 dependencyList.add(depend);
             }
         }
     }
 
     /**
      * Sets the position of the {@code Field} in the validation list.
      * @param fieldOrder The field position.
      */
     public void setFieldOrder(final int fieldOrder) {
         this.fieldOrder = fieldOrder;
     }
 
     /**
      * Sets the indexed property name of the field.
      * @param indexedListProperty The field's indexed List property name.
      */
     public void setIndexedListProperty(final String indexedListProperty) {
         this.indexedListProperty = indexedListProperty;
     }
     /**
      * Sets the indexed property name of the field.
      * @param indexedProperty The field's indexed property name.
      */
     public void setIndexedProperty(final String indexedProperty) {
         this.indexedProperty = indexedProperty;
     }
 
     /**
      * Sets a unique key for the field.  This can be used to change
      * the key temporarily to have a unique key for an indexed field.
      * @param key a unique key for the field
      */
     public void setKey(final String key) {
         this.key = key;
     }
 
     /**
      * Sets the page value that the Field is associated with for
      * validation.
      * @param page The page number.
      */
     public void setPage(final int page) {
         this.page = page;
     }
 
     /**
      * Sets the property name of the field.
      * @param property The field's property name.
      */
     public void setProperty(final String property) {
         this.property = property;
     }
 
     /**
      * Returns a string representation of the object.
      * @return A string representation of the object.
      */
     @Override
     public String toString() {
         final StringBuilder results = new StringBuilder();
 
         results.append("\t\tkey = " + key + "\n");
         results.append("\t\tproperty = " + property + "\n");
         results.append("\t\tindexedProperty = " + indexedProperty + "\n");
         results.append("\t\tindexedListProperty = " + indexedListProperty + "\n");
         results.append("\t\tdepends = " + depends + "\n");
         results.append("\t\tpage = " + page + "\n");
         results.append("\t\tfieldOrder = " + fieldOrder + "\n");
 
         if (hVars != null) {
             results.append("\t\tVars:\n");
             for (final Object key1 : getVarMap().keySet()) {
                 results.append("\t\t\t");
                 results.append(key1);
                 results.append("=");
                 results.append(getVarMap().get(key1));
                 results.append("\n");
             }
         }
 
         return results.toString();
     }
 
     /**
      * Run the configured validations on this field.  Run all validations
      * in the depends clause over each item in turn, returning when the first
      * one fails.
      * @param params A Map of parameter class names to parameter values to pass
      * into validation methods.
      * @param actions A Map of validator names to ValidatorAction objects.
      * @return A ValidatorResults object containing validation messages for
      * this field.
      * @throws ValidatorException If an error occurs during validation.
      */
     public ValidatorResults validate(final Map<String, Object> params, final Map<String, ValidatorAction> actions)
             throws ValidatorException {
 
         if (getDepends() == null) {
             return new ValidatorResults();
         }
 
         final ValidatorResults allResults = new ValidatorResults();
 
         final Object bean = params.get(Validator.BEAN_PARAM);
         final int numberOfFieldsToValidate = isIndexed() ? getIndexedPropertySize(bean) : 1;
 
         for (int fieldNumber = 0; fieldNumber < numberOfFieldsToValidate; fieldNumber++) {
 
             final ValidatorResults results = new ValidatorResults();
             synchronized (dependencyList) {
                 for (final String depend : dependencyList) {
 
                     final ValidatorAction action = actions.get(depend);
                     if (action == null) {
                         handleMissingAction(depend);
                     }
 
                     final boolean good = validateForRule(action, results, actions, params, fieldNumber);
 
                     if (!good) {
                         allResults.merge(results);
                         return allResults;
                     }
                 }
             }
             allResults.merge(results);
         }
 
         return allResults;
     }
 
     /**
      * Executes the given ValidatorAction and all ValidatorActions that it
      * depends on.
      * @return true if the validation succeeded.
      */
     private boolean validateForRule(
         final ValidatorAction va,
         final ValidatorResults results,
         final Map<String, ValidatorAction> actions,
         final Map<String, Object> params,
         final int pos)
         throws ValidatorException {
 
         final ValidatorResult result = results.getValidatorResult(getKey());
         if (result != null && result.containsAction(va.getName())) {
             return result.isValid(va.getName());
         }
 
         if (!runDependentValidators(va, results, actions, params, pos)) {
             return false;
         }
 
         return va.executeValidationMethod(this, params, results, pos);
     }
 }