/*

  * Copyright 2006-2011 The Kuali Foundation

  *

  * Licensed under the Educational Community 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

  *

  * http://www.opensource.org/licenses/ecl2.php

  *

  * 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.

  */

 // begin Kuali Foundation modification

 package org.kuali.rice.kns.web.struts.form.pojo;

 import org.apache.commons.beanutils.PropertyUtils;

 import org.apache.commons.lang.StringUtils;

 import org.apache.commons.lang.time.StopWatch;

 import org.apache.log4j.Logger;

 import org.apache.struts.action.ActionForm;

 import org.kuali.rice.core.framework.services.CoreFrameworkServiceLocator;

 import org.kuali.rice.core.web.format.FormatException;

 import org.kuali.rice.core.web.format.Formatter;

 import org.kuali.rice.kns.util.WebUtils;

 import org.kuali.rice.kns.web.EditablePropertiesHistoryHolder;

 import org.kuali.rice.krad.exception.ValidationException;

 import org.kuali.rice.krad.util.GlobalVariables;

 import org.kuali.rice.krad.util.KRADConstants;

 import org.kuali.rice.krad.util.ObjectUtils;

 import javax.servlet.http.HttpServletRequest;

 import java.lang.reflect.InvocationTargetException;

 import java.util.ArrayList;

 import java.util.Collections;

 import java.util.Enumeration;

 import java.util.HashMap;

 import java.util.HashSet;

 import java.util.Iterator;

 import java.util.List;

 import java.util.Map;

 import java.util.Set;

 /**

  * This class is the base form which implements the PojoForm interface.

  * Kuali Foundation modification: javadoc comments changed

  */

 // begin Kuali Foundation modification: this class was named SLActionForm

 public class PojoFormBase extends ActionForm implements PojoForm {

     private static final long serialVersionUID = 1L;

     // begin Kuali Foundation modification

     private static final Logger LOG = Logger.getLogger(PojoFormBase.class);

     private static final String PREVIOUS_REQUEST_EDITABLE_PROPERTIES_GUID = "editablePropertiesGuid";

         // removed member variables: cachedActionErrors, coder, errorInfo, fieldOrder, formConfig, HEADING_KEY, IGNORED_KEYS,

         //     invalidValueKeys, logger, messageResourceKey, messageResources, padNonRequiredFields, valueBinder

     static final String CREATE_ERR_MSG = "Can't create formatter for keypath ";

     static final String CONVERT_ERR_MSG = "Can't convert value for keypath: ";

     static Map classCache = Collections.synchronizedMap(new HashMap());

     private Map unconvertedValues = new HashMap();

     private List unknownKeys = new ArrayList();

     private Map formatterTypes = new HashMap();

     private List<String> maxUploadFileSizes = new ArrayList<String>();

     private Set<String> editableProperties = new HashSet<String>();

     protected Set<String> requiredNonEditableProperties = new HashSet<String>();

     private String strutsActionMappingScope; 

     private boolean isNewForm = true;

     private String populateEditablePropertiesGuid;

     private String actionEditablePropertiesGuid;

     // removed methods: PojoFormBase()/SLActionForm(), addFormLevelMessageInfo, addGlobalMessage, addIgnoredKey, addIgnoredKeys, addLengthValidation, addMessageIfAbsent

     //     addPatternValidation, addPropertyValidationRules, addRangeValidation, addRequiredField, addRequiredFields

     //     addUnknownKey, addValidationRule(String, ValidationRule), addValidationRule(ValidationRule), cachedActionErrors, clearIgnoredKeys,

     //     clearUnknownKeys, clearValidationErrors, coalesceMessageArgs, containsKey, convertValue, createActionMessage, createMessageResourcesIfNecessary, fieldOrder, fieldValidationRuleOrder,

     //     formatMessage, formatMessageArgs, formatterSettingsForKeypath, formatterTypeForKeypath, formBeanConfigForKey, formConfig, formValidationRuleOrder,

     //     generateErrorMessages, getActionErrors, getActionMessages, getErrorMessages, getFieldLabel, getFormatterTypes, getGlobalMessages, getIgnoredKeys, getInvalidValueKeys, getLabels, getLengthValidations, getLocale,

     //     getMultipartRequestParameters, getPadNonRequiredFields, 

     //     getPatternValidations, getPropertyConfig, getRangeValidations, getRequiredFields, hasErrorMessageForKey, hasErrors, hasFormatterForKeypath,

     //     hasGlobalMessageForKey, isMultipart, messageForKey, messageForRule, messageInfoForRule, messageResourcesConfigForKey, messageResourcesKey, messageResourcesPath,

     //     messagesForFormLevelRule, messagesForKey, moduleConfigForRequest, removeIgnoredKey, removePropertyConfig,

     //     renderErrorMessages, renderGlobalMessages, renderMessages, setFieldLabel, setFieldOrder, setFormatterType(String, Class, Map)

     //     setFormConfig, setInvalidValueKeys, setLengthValidations, setMessageResourceKey,setPadNonRequiredFields, setPatternValidations, setPropertyConfig, setRangeValidations,

     //     setRequiredFields, setValueBinder, shouldFormat, validate, validateForm, validateLength, validatePattern, validateProperty, validateRange, validateRequestValues, validateRequired, valueBinder

         // end Kuali Foundation modification

         // begin Kuali Foundation modification

     /**

      * Method is called after parameters from a multipart request have been made accessible to request.getParameter calls, but

      * before request parameter values are used to instantiate and populate business objects. Important note: parameters in the

      * given Map which were created from a multipart-encoded parameter will, apparently, be stored in the given Map as String[]

      * instead of as String.

      *

      * @param requestParameters

      */

     @Override

         public void postprocessRequestParameters(Map requestParameters) {

         // do nothing

     }

     // end Kuali Foundation modification

     /**

      * Populates the form with values from the current request. Uses instances of Formatter to convert strings to the Java types of

      * the properties to which they are bound. Values that can't be converted are cached in a map of unconverted values. Returns an

      * ActionErrors containing ActionMessage instances for each conversion error that occured, if any.

      */

     @Override

         public void populate(HttpServletRequest request) {

         String watchName = "PojoFormBase.populate";

         StopWatch watch = new StopWatch();

         watch.start();

         if (LOG.isDebugEnabled()) {

             LOG.debug(watchName + ": started");

         }

         unconvertedValues.clear();

         unknownKeys = new ArrayList();

         addRequiredNonEditableProperties();

         Map params = request.getParameterMap();

         String contentType = request.getContentType();

         String method = request.getMethod();

         if ("POST".equalsIgnoreCase(method) && contentType != null && contentType.startsWith("multipart/form-data")) {

             Map fileElements = (HashMap)request.getAttribute(KRADConstants.UPLOADED_FILE_REQUEST_ATTRIBUTE_KEY);

             Enumeration names = Collections.enumeration(fileElements.keySet());

             while (names.hasMoreElements()) {

                 String name = (String) names.nextElement();

                 params.put(name, fileElements.get(name));

             }

         }

         postprocessRequestParameters(params);

         /**

          * Iterate through request parameters, if parameter matches a form variable, get the property type, formatter and convert,

          * if not add to the unknowKeys map.

          */

         for (Iterator iter = params.keySet().iterator(); iter.hasNext();) {

             String keypath = (String) iter.next();

             if (shouldPropertyBePopulatedInForm(keypath, request)) {

                     Object param = params.get(keypath);

                     //LOG.debug("(keypath,paramType)=(" + keypath + "," + param.getClass().getName() + ")");

                     populateForProperty(keypath, param, params);

             }

         }

         this.registerIsNewForm(false);

         watch.stop();

         if (LOG.isDebugEnabled()) {

             LOG.debug(watchName + ": " + watch.toString());        

         }

     }

         /**

          * Populates a given parameter value into the given property path

          * @param paramPath the path to a property within the form

          * @param paramValue the value of that property

          * @param params the Map of parameters from the request

          */

         protected void populateForProperty(String paramPath, Object paramValue,

                         Map params) {

                 // get type for property

                 Class type = null;

                 try {

                     // TODO: see KULOWF-194

                     //testForPojoHack(this, keypath);

                     type = getPropertyType(paramPath);

                 }

                 catch (Exception e) {

                     // deleted redundant unknownKeys.add(keypath)

                 }

                 // keypath does not match anything on form

                 if (type == null) {

                     unknownKeys.add(paramPath);

                 }

                 else {

                     Formatter formatter = null;

                     try {

                         formatter = buildFormatter(paramPath, type, params);

                         ObjectUtils.setObjectProperty(formatter, this, paramPath, type, paramValue);

                             }

                     catch (FormatException e1) {

                         GlobalVariables.getMessageMap().putError(paramPath, e1.getErrorKey(), e1.getErrorArgs());

                         cacheUnconvertedValue(paramPath, paramValue);

                     }

                     catch (InvocationTargetException e1) {

                         if (e1.getTargetException().getClass().equals(FormatException.class)) {

                             // Handle occasional case where FormatException is wrapped in an InvocationTargetException

                             FormatException formatException = (FormatException) e1.getTargetException();

                             GlobalVariables.getMessageMap().putError(paramPath, formatException.getErrorKey(), formatException.getErrorArgs());

                             cacheUnconvertedValue(paramPath, paramValue);

                         }

                         else {

                             LOG.error("Error occurred in populate " + e1.getMessage());

                             throw new RuntimeException(e1.getMessage(), e1);

                         }

                     }

                     catch (Exception e1) {

                         LOG.error("Error occurred in populate " + e1.getMessage());

                             LOG.error("FormClass:       " + this.getClass().getName() );

                             LOG.error("keypath:         " + paramPath );

                             LOG.error("Detected Type:   " + type.getName() );

                             LOG.error( "Value:          " + paramValue );

                             if ( paramValue != null ) {

                                         LOG.error( "Value Class:    " + paramValue.getClass().getName() );

                             }

                         throw new RuntimeException(e1.getMessage(), e1);

                     }

                 }

         }

         // begin Kuali Foundation modification

     private Formatter buildFormatter(String keypath, Class propertyType, Map requestParams) {

         Formatter formatter = buildFormatterForKeypath(keypath, propertyType, requestParams);

         if (formatter == null) {

             formatter = buildFormatterForType(propertyType);

         }

         return formatter;

     }

     // end Kuali Foundation modification

         // begin Kuali Foundation modification

     private Formatter buildFormatterForKeypath(String keypath, Class propertyType, Map requestParams) {

         Formatter formatter = null;

         Class formatterClass = formatterClassForKeypath(keypath);

         if (formatterClass != null) {

             try {

                 formatter = (Formatter) formatterClass.newInstance();

             }

             catch (InstantiationException e) {

                 throw new FormatException("unable to instantiate formatter class '" + formatterClass.getName() + "'", e);

             }

             catch (IllegalAccessException e) {

                 throw new FormatException("unable to access formatter class '" + formatterClass.getName() + "'", e);

             }

             formatter.setPropertyType(propertyType);

         }

         return formatter;

     }

     // end Kuali Foundation modification

         // begin Kuali Foundation modification

     private Formatter buildFormatterForType(Class propertyType) {

         Formatter formatter = null;

         if (Formatter.findFormatter(propertyType) != null) {

             formatter = Formatter.getFormatter(propertyType);

         }

         return formatter;

     }

     // end Kuali Foundation modification

         /**

      * Delegates to {@link PropertyUtils#getPropertyType(Object, String)}to look up the property type for the provided keypath.

      * Caches the resulting class so that subsequent lookups for the same keypath can be satisfied by looking in the cache.

      *

      * @throws NoSuchMethodException

      * @throws InvocationTargetException

      * @throws IllegalAccessException

      */

     protected Class getPropertyType(String keypath) throws IllegalAccessException, InvocationTargetException, NoSuchMethodException {

         Map propertyTypes = (Map) classCache.get(getClass());

         if (propertyTypes == null) {

             propertyTypes = new HashMap();

             classCache.put(getClass(), propertyTypes);

         }

         // if type has not been retrieve previousely, use ObjectUtils to get type

         if (!propertyTypes.containsKey(keypath)) {

             Class type = ObjectUtils.easyGetPropertyType(this, keypath);

             propertyTypes.put(keypath, type);

         }

         Class propertyType = (Class) propertyTypes.get(keypath);

         return propertyType;

     }

     /**

      * Retrieves a formatter for the keypath and property type.

      *

      * @param keypath

      * @param propertyType

      * @return

      */

     protected Formatter getFormatter(String keypath, Class propertyType) {

         // check for a formatter associated with the keypath

         Class type = formatterClassForKeypath(keypath);

         Formatter formatter;

         if (type == null) {

             // retrieve formatter based on property type

             formatter = Formatter.getFormatter(propertyType);

         }

         else {

             try {

                 formatter = (Formatter) type.newInstance();

                 formatter.setPropertyType(propertyType);

             }

             catch (Exception e) {

                 throw new ValidationException(CREATE_ERR_MSG, e);

             }

         }

         return formatter;

     }

         // begin Kuali Foundation modification

     /**

      * Retrieves any formatters associated specially with the keypath.

      *

      * @param keypath

      * @return

      */

     protected Class formatterClassForKeypath(String keypath) {

         // remove traces of array and map indices from the incoming keypath

         String indexlessKey = keypath.replaceAll("(\\[[0-9]*+\\]|\\(.*?\\))", "");

         return (Class)formatterTypes.get( indexlessKey );

     }

     // end Kuali Foundation modification

     /**

      * Tries to format the provided value by passing it to a suitable {@link Formatter}. Adds an ActionMessage to the ActionErrors

      * in the request if a FormatException is thrown.

      * <p>

      * Caution should be used when invoking this method. It should never be called prior to {@link #populate(HttpServletRequest)}

      * because the cached request reference could be stale.

      */

     @Override

         public Object formatValue(Object value, String keypath, Class type) {

         Formatter formatter = getFormatter(keypath, type);

         if ( LOG.isDebugEnabled() ) {

             LOG.debug("formatValue (value,keypath,type) = (" + value + "," + keypath + "," + type.getName() + ")");

         }

         try {

             return Formatter.isSupportedType(type) ? formatter.formatForPresentation(value) : value;

         }

         catch (FormatException e) {

             GlobalVariables.getMessageMap().putError(keypath, e.getErrorKey(), e.getErrorArgs());

             return value.toString();

         }

     }

     /**

      * Sets the Formatter class to use for a given keypath. This class will be used by the form instead of the one returned by calls

      * to {@link Formatter#getFormatter(Class)}, which is the default mechanism.

      */

     public void setFormatterType(String keypath, Class type) {

         formatterTypes.put(keypath, type);

     }

     @Override

         public Map getUnconvertedValues() {

         return unconvertedValues;

     }

     public void setUnconvertedValues(Map unconvertedValues) {

         this.unconvertedValues = unconvertedValues;

     }

     protected List getUnknownKeys() {

         return unknownKeys;

     }

     protected void cacheUnconvertedValue(String key, Object value) {

         Class type = value.getClass();

         if (type.isArray()) {

             value = Formatter.isEmptyValue(value) ? null : ((Object[]) value)[0];

         }

         unconvertedValues.put(key, value);

     }

         // begin Kuali Foundation modification

     @Override

         public void processValidationFail() {

         // do nothing - subclasses can implement this if they want to.

     }

     // end Kuali Foundation modification

         // begin Kuali Foundation modification

     /**

      * Gets the formatterTypes attribute.

      * 

      * @return Returns the formatterTypes.

      */

     public Map getFormatterTypes() {

         return formatterTypes;

     }

     // end Kuali Foundation modification

         // begin Kuali Foundation modification

     /**

      * Sets the formatterTypes attribute value.

      * @param formatterTypes The formatterTypes to set.

      */

     public void setFormatterTypes(Map formatterTypes) {

         this.formatterTypes = formatterTypes;

     }

     // end Kuali Foundation modification

         // begin Kuali Foundation modification

     /**

      * Adds the given string as a maximum size to the form.  It will be used if a file upload is used.

      * 

      * @param sizeString

      */

     protected final void addMaxUploadSize( String sizeString ) {

         maxUploadFileSizes.add( sizeString );

     }

     /**

      * Initializes the list of max upload sizes if necessary. 

      *

      */

     protected final void initMaxUploadSizes() {

             if ( maxUploadFileSizes.isEmpty() ) {

                 customInitMaxUploadSizes();

                 // if it's still empty, add the default

                 if ( maxUploadFileSizes.isEmpty() ) {

                     addMaxUploadSize(CoreFrameworkServiceLocator.getParameterService().getParameterValueAsString(

                         KRADConstants.KRAD_NAMESPACE, KRADConstants.DetailTypes.ALL_DETAIL_TYPE, KRADConstants.MAX_UPLOAD_SIZE_PARM_NM));

                 }

             }        

     }

     /**

      * Subclasses can override this to add their own max upload size to the list.  Only the largest passed will be used.

      *

      */

     protected void customInitMaxUploadSizes() {

         // nothing here

     }

     public final List<String> getMaxUploadSizes() {

         initMaxUploadSizes();

         return maxUploadFileSizes;

     }

     @Override

         public void registerEditableProperty(String editablePropertyName){

             if ( LOG.isDebugEnabled() ) {

                     LOG.debug( "KualiSessionId: " + GlobalVariables.getUserSession().getKualiSessionId() + " -- Registering Property: " + editablePropertyName );

             }

             editableProperties.add(editablePropertyName);

     }

     public void registerRequiredNonEditableProperty(String requiredNonEditableProperty) {

             requiredNonEditableProperties.add(requiredNonEditableProperty);

     }

     @Override

         public void clearEditablePropertyInformation(){

             if ( LOG.isDebugEnabled() ) {

                     LOG.debug( "KualiSessionId: " + GlobalVariables.getUserSession().getKualiSessionId() + " -- Clearing Editable Properties" );

             }

             editableProperties = new HashSet<String>();

     }

     @Override

         public Set<String> getEditableProperties(){

             return editableProperties;

     }

     public boolean isPropertyEditable(String propertyName) {

             final Set<String> populateEditableProperties = getPopulateEditableProperties();

         return WebUtils.isPropertyEditable(populateEditableProperties, propertyName);

     }

     /***

      * @see PojoForm#addRequiredNonEditableProperties()

      */

     @Override

         public void addRequiredNonEditableProperties(){

     }

     public boolean isPropertyNonEditableButRequired(String propertyName) {

         return WebUtils.isPropertyEditable(requiredNonEditableProperties, propertyName);

     }

     protected String getParameter(HttpServletRequest request, String parameterName){

             return request.getParameter(parameterName);

     }

     protected String[] getParameterValues(HttpServletRequest request, String parameterName){

             return request.getParameterValues(parameterName);

     }

     @Override

         public Set<String> getRequiredNonEditableProperties(){

             return requiredNonEditableProperties;

     }

         /**

          * @see PojoForm#registerStrutsActionMappingScope(String)

          */

         @Override

         public void registerStrutsActionMappingScope(String strutsActionMappingScope) {

                 this.strutsActionMappingScope = strutsActionMappingScope;

         }

         public String getStrutsActionMappingScope() {

                 return strutsActionMappingScope;

         }

         /**

          * @see PojoForm#registerStrutsActionMappingScope(String)

          */

         @Override

         public void registerIsNewForm(boolean isNewForm) {

                 this.isNewForm = isNewForm;

         }

         @Override

         public boolean getIsNewForm() {

                 return this.isNewForm;

         }

         /**

          * @see PojoForm#shouldPropertyBePopulatedInForm(java.lang.String, javax.servlet.http.HttpServletRequest)

          */

         @Override

         public boolean shouldPropertyBePopulatedInForm(String requestParameterName, HttpServletRequest request) {

                 if (requestParameterName.equals(PojoFormBase.PREVIOUS_REQUEST_EDITABLE_PROPERTIES_GUID)) {

                         return false; // don't repopulate this

                 }

                 else if (StringUtils.equalsIgnoreCase("session",getStrutsActionMappingScope()) && !getIsNewForm()) {

                         return isPropertyEditable(requestParameterName) || isPropertyNonEditableButRequired(requestParameterName); 

                 }

                 return true;

         }

         /**

          * Base implementation that returns just "start".  sub-implementations should not add values to Set instance returned

          * by this method, and should create its own instance.

          * 

          * @see PojoForm#getMethodToCallsToBypassSessionRetrievalForGETRequests()

          */

         @Override

         public Set<String> getMethodToCallsToBypassSessionRetrievalForGETRequests() {

                 Set<String> defaultMethodToCalls = new HashSet<String>();

                 defaultMethodToCalls.add(KRADConstants.START_METHOD);

                 return defaultMethodToCalls;

         }

         /**

          * Sets the guid to editable properties consulted during population

          * 

          */

         @Override

         public void setPopulateEditablePropertiesGuid(String guid) {

                 this.populateEditablePropertiesGuid = guid;

         }

         /**

          * @return the guid for the populate editable properties

          */

         public String getPopulateEditablePropertiesGuid() {

                 return this.populateEditablePropertiesGuid;

         }

         /**

          * Sets the guid of the editable properties which were registered by the action

          * @see PojoForm#setActionEditablePropertiesGuid(java.lang.String)

          */

         @Override

         public void setActionEditablePropertiesGuid(String guid) {

                 this.actionEditablePropertiesGuid = guid;

         }

         /**

          * @return the guid of the editable properties which had been registered by the action processing

          */

         public String getActionEditablePropertiesGuid() {

                 return actionEditablePropertiesGuid;

         }

         /**

          * @return the editable properties to be consulted during population

          */

         public Set<String> getPopulateEditableProperties() {

                 EditablePropertiesHistoryHolder holder = (EditablePropertiesHistoryHolder) GlobalVariables.getUserSession().getObjectMap().get(

                 KRADConstants.EDITABLE_PROPERTIES_HISTORY_HOLDER_ATTR_NAME);

             if (holder == null) {

                     holder = new EditablePropertiesHistoryHolder();

             }

             GlobalVariables.getUserSession().addObject(KRADConstants.EDITABLE_PROPERTIES_HISTORY_HOLDER_ATTR_NAME, holder);

                 return holder.getEditableProperties(getPopulateEditablePropertiesGuid());

         }

         /**

          * Copies all editable properties in the populate editable properties to the action editable properties

          */

         public void copyPopulateEditablePropertiesToActionEditableProperties() {

                 Set<String> populateEditableProperties = getPopulateEditableProperties();

                 for (String property : populateEditableProperties) {

                         registerEditableProperty(property);

                 }

         }

         // end Kuali Foundation modification

 }