/*

  * Copyright 2002-2007,2009 The Apache Software Foundation.

  *

  * Licensed 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

  *

  *      http://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 com.opensymphony.xwork2.interceptor;

 import com.opensymphony.xwork2.ActionContext;

 import com.opensymphony.xwork2.ActionInvocation;

 import com.opensymphony.xwork2.security.AcceptedPatternsChecker;

 import com.opensymphony.xwork2.security.ExcludedPatternsChecker;

 import com.opensymphony.xwork2.ValidationAware;

 import com.opensymphony.xwork2.XWorkConstants;

 import com.opensymphony.xwork2.conversion.impl.InstantiatingNullHandler;

 import com.opensymphony.xwork2.conversion.impl.XWorkConverter;

 import com.opensymphony.xwork2.inject.Inject;

 import com.opensymphony.xwork2.util.ClearableValueStack;

 import com.opensymphony.xwork2.util.LocalizedTextUtil;

 import com.opensymphony.xwork2.util.MemberAccessValueStack;

 import com.opensymphony.xwork2.util.ValueStack;

 import com.opensymphony.xwork2.util.ValueStackFactory;

 import com.opensymphony.xwork2.util.logging.Logger;

 import com.opensymphony.xwork2.util.logging.LoggerFactory;

 import com.opensymphony.xwork2.util.reflection.ReflectionContextState;

 import java.util.Collection;

 import java.util.Comparator;

 import java.util.Map;

 import java.util.TreeMap;

 /**

  * <!-- START SNIPPET: description -->

  * This interceptor sets all parameters on the value stack.

  *

  * This interceptor gets all parameters from {@link ActionContext#getParameters()} and sets them on the value stack by

  * calling {@link ValueStack#setValue(String, Object)}, typically resulting in the values submitted in a form

  * request being applied to an action in the value stack. Note that the parameter map must contain a String key and

  * often containers a String[] for the value.

  *

  * The interceptor takes one parameter named 'ordered'. When set to true action properties are guaranteed to be

  * set top-down which means that top action's properties are set first. Then it's subcomponents properties are set.

  * The reason for this order is to enable a 'factory' pattern. For example, let's assume that one has an action

  * that contains a property named 'modelClass' that allows to choose what is the underlying implementation of model.

  * By assuring that modelClass property is set before any model properties are set, it's possible to choose model

  * implementation during action.setModelClass() call. Similiarily it's possible to use action.setPrimaryKey()

  * property set call to actually load the model class from persistent storage. Without any assumption on parameter

  * order you have to use patterns like 'Preparable'.

  *

  * Because parameter names are effectively OGNL statements, it is important that security be taken in to account.

  * This interceptor will not apply any values in the parameters map if the expression contains an assignment (=),

  * multiple expressions (,), or references any objects in the context (#). This is all done in the {@link

  * #acceptableName(String)} method. In addition to this method, if the action being invoked implements the {@link

  * ParameterNameAware} interface, the action will be consulted to determine if the parameter should be set.

  *

  * In addition to these restrictions, a flag ({@link ReflectionContextState#DENY_METHOD_EXECUTION}) is set such that

  * no methods are allowed to be invoked. That means that any expression such as <i>person.doSomething()</i> or

  * <i>person.getName()</i> will be explicitely forbidden. This is needed to make sure that your application is not

  * exposed to attacks by malicious users.

  *

  * While this interceptor is being invoked, a flag ({@link ReflectionContextState#CREATE_NULL_OBJECTS}) is turned

  * on to ensure that any null reference is automatically created - if possible. See the type conversion documentation

  * and the {@link InstantiatingNullHandler} javadocs for more information.

  *

  * Finally, a third flag ({@link XWorkConverter#REPORT_CONVERSION_ERRORS}) is set that indicates any errors when

  * converting the the values to their final data type (String[] -&gt; int) an unrecoverable error occured. With this

  * flag set, the type conversion errors will be reported in the action context. See the type conversion documentation

  * and the {@link XWorkConverter} javadocs for more information.

  *

  * If you are looking for detailed logging information about your parameters, turn on DEBUG level logging for this

  * interceptor. A detailed log of all the parameter keys and values will be reported.

  *

  * <b>Note:</b> Since XWork 2.0.2, this interceptor extends {@link MethodFilterInterceptor}, therefore being

  * able to deal with excludeMethods / includeMethods parameters. See [Workflow Interceptor]

  * (class {@link DefaultWorkflowInterceptor}) for documentation and examples on how to use this feature.

  * <!-- END SNIPPET: description -->

  *

  * <u>Interceptor parameters:</u>

  *

  * <!-- START SNIPPET: parameters -->

  *

  * <ul>

  * <li>ordered - set to true if you want the top-down property setter behaviour</li>

  * <li>acceptParamNames - a comma delimited list of regular expressions to describe a whitelist of accepted parameter names.

  * Don't change the default unless you know what you are doing in terms of security implications</li>

  * <li>excludeParams - a comma delimited list of regular expressions to describe a blacklist of not allowed parameter names</li>

  * <li>paramNameMaxLength - the maximum length of parameter names; parameters with longer names will be ignored; the default is 100 characters</li>

  * </ul>

  *

  * <!-- END SNIPPET: parameters -->

  *

  *  <u>Extending the interceptor:</u>

  *

  * <!-- START SNIPPET: extending -->

  *

  *  The best way to add behavior to this interceptor is to utilize the {@link ParameterNameAware} interface in your

  * actions. However, if you wish to apply a global rule that isn't implemented in your action, then you could extend

  * this interceptor and override the {@link #acceptableName(String)} method.

  *

  * <!-- END SNIPPET: extending -->

  *

  *

  * <!-- START SNIPPET: extending-warning -->

  * Using {@link ParameterNameAware} could be dangerous as {@link ParameterNameAware#acceptableParameterName(String)} takes precedence

  * over ParametersInterceptor which means if ParametersInterceptor excluded given parameter name you can accept it with

  * {@link ParameterNameAware#acceptableParameterName(String)}.

  *

  * The best idea is to define very tight restrictions with ParametersInterceptor and relax them per action with

  * {@link ParameterNameAware#acceptableParameterName(String)}

  * <!-- END SNIPPET: extending-warning -->

  *

  *

  * <u>Example code:</u>

  *

  * <pre>

  * <!-- START SNIPPET: example -->

  * &lt;action name="someAction" class="com.examples.SomeAction"&gt;

  *     &lt;interceptor-ref name="params"/&gt;

  *     &lt;result name="success"&gt;good_result.ftl&lt;/result&gt;

  * &lt;/action&gt;

  * <!-- END SNIPPET: example -->

  * </pre>

  *

  * @author Patrick Lightbody

  */

 public class ParametersInterceptor extends MethodFilterInterceptor {

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

     protected static final int PARAM_NAME_MAX_LENGTH = 100;

     private int paramNameMaxLength = PARAM_NAME_MAX_LENGTH;

     private boolean devMode = false;

     protected boolean ordered = false;

     private ValueStackFactory valueStackFactory;

     private ExcludedPatternsChecker excludedPatterns;

     private AcceptedPatternsChecker acceptedPatterns;

     @Inject

     public void setValueStackFactory(ValueStackFactory valueStackFactory) {

         this.valueStackFactory = valueStackFactory;

     }

     @Inject(XWorkConstants.DEV_MODE)

     public void setDevMode(String mode) {

         devMode = "true".equalsIgnoreCase(mode);

     }

     @Inject

     public void setExcludedPatterns(ExcludedPatternsChecker excludedPatterns) {

         this.excludedPatterns = excludedPatterns;

     }

     @Inject

     public void setAcceptedPatterns(AcceptedPatternsChecker acceptedPatterns) {

         this.acceptedPatterns = acceptedPatterns;

     }

     /**

      * If the param name exceeds the configured maximum length it will not be

      * accepted.

      *

      * @param paramNameMaxLength Maximum length of param names

      */

     public void setParamNameMaxLength(int paramNameMaxLength) {

         this.paramNameMaxLength = paramNameMaxLength;

     }

     static private int countOGNLCharacters(String s) {

         int count = 0;

         for (int i = s.length() - 1; i >= 0; i--) {

             char c = s.charAt(i);

             if (c == '.' || c == '[') count++;

         }

         return count;

     }

     /**

      * Compares based on number of '.' and '[' characters (fewer is higher)

      */

     static final Comparator<String> rbCollator = new Comparator<String>() {

         public int compare(String s1, String s2) {

             int l1 = countOGNLCharacters(s1),

                 l2 = countOGNLCharacters(s2);

             return l1 < l2 ? -1 : (l2 < l1 ? 1 : s1.compareTo(s2));

         }

     };

     @Override

     public String doIntercept(ActionInvocation invocation) throws Exception {

         Object action = invocation.getAction();

         if (!(action instanceof NoParameters)) {

             ActionContext ac = invocation.getInvocationContext();

             final Map<String, Object> parameters = retrieveParameters(ac);

             if (LOG.isDebugEnabled()) {

                 LOG.debug("Setting params " + getParameterLogMap(parameters));

             }

             if (parameters != null) {

                 Map<String, Object> contextMap = ac.getContextMap();

                 try {

                     ReflectionContextState.setCreatingNullObjects(contextMap, true);

                     ReflectionContextState.setDenyMethodExecution(contextMap, true);

                     ReflectionContextState.setReportingConversionErrors(contextMap, true);

                     ValueStack stack = ac.getValueStack();

                     setParameters(action, stack, parameters);

                 } finally {

                     ReflectionContextState.setCreatingNullObjects(contextMap, false);

                     ReflectionContextState.setDenyMethodExecution(contextMap, false);

                     ReflectionContextState.setReportingConversionErrors(contextMap, false);

                 }

             }

         }

         return invocation.invoke();

     }

     /**

      * Gets the parameter map to apply from wherever appropriate

      *

      * @param ac The action context

      * @return The parameter map to apply

      */

     protected Map<String, Object> retrieveParameters(ActionContext ac) {

         return ac.getParameters();

     }

     /**

      * Adds the parameters into context's ParameterMap

      *

      * @param ac        The action context

      * @param newParams The parameter map to apply

      *                  <p/>

      *                  In this class this is a no-op, since the parameters were fetched from the same location.

      *                  In subclasses both retrieveParameters() and addParametersToContext() should be overridden.

      */

     protected void addParametersToContext(ActionContext ac, Map<String, Object> newParams) {

     }

     protected void setParameters(final Object action, ValueStack stack, final Map<String, Object> parameters) {

         Map<String, Object> params;

         Map<String, Object> acceptableParameters;

         if (ordered) {

             params = new TreeMap<String, Object>(getOrderedComparator());

             acceptableParameters = new TreeMap<String, Object>(getOrderedComparator());

             params.putAll(parameters);

         } else {

             params = new TreeMap<String, Object>(parameters);

             acceptableParameters = new TreeMap<String, Object>();

         }

         for (Map.Entry<String, Object> entry : params.entrySet()) {

             String name = entry.getKey();

             Object value = entry.getValue();

             if (isAcceptableParameter(name, action)) {

                 acceptableParameters.put(name, entry.getValue());

             }

         }

         ValueStack newStack = valueStackFactory.createValueStack(stack);

         boolean clearableStack = newStack instanceof ClearableValueStack;

         if (clearableStack) {

             //if the stack's context can be cleared, do that to prevent OGNL

             //from having access to objects in the stack, see XW-641

             ((ClearableValueStack)newStack).clearContextValues();

             Map<String, Object> context = newStack.getContext();

             ReflectionContextState.setCreatingNullObjects(context, true);

             ReflectionContextState.setDenyMethodExecution(context, true);

             ReflectionContextState.setReportingConversionErrors(context, true);

             //keep locale from original context

             context.put(ActionContext.LOCALE, stack.getContext().get(ActionContext.LOCALE));

         }

         boolean memberAccessStack = newStack instanceof MemberAccessValueStack;

         if (memberAccessStack) {

             //block or allow access to properties

             //see WW-2761 for more details

             MemberAccessValueStack accessValueStack = (MemberAccessValueStack) newStack;

             accessValueStack.setAcceptProperties(acceptedPatterns.getAcceptedPatterns());

             accessValueStack.setExcludeProperties(excludedPatterns.getExcludedPatterns());

         }

         for (Map.Entry<String, Object> entry : acceptableParameters.entrySet()) {

             String name = entry.getKey();

             Object value = entry.getValue();

             try {

                 newStack.setParameter(name, value);

             } catch (RuntimeException e) {

                 if (devMode) {

                     notifyDeveloperParameterException(action, name, e.getMessage());

                 }

             }

         }

         if (clearableStack && (stack.getContext() != null) && (newStack.getContext() != null))

             stack.getContext().put(ActionContext.CONVERSION_ERRORS, newStack.getContext().get(ActionContext.CONVERSION_ERRORS));

         addParametersToContext(ActionContext.getContext(), acceptableParameters);

     }

     protected void notifyDeveloperParameterException(Object action, String property, String message) {

         String developerNotification = LocalizedTextUtil.findText(ParametersInterceptor.class, "devmode.notification",

                 ActionContext.getContext().getLocale(), "Developer Notification:\n{0}",

                 new Object[]{

                         "Unexpected Exception caught setting '" + property + "' on '" + action.getClass() + ": " + message

                 }

         );

         LOG.error(developerNotification);

         // see https://issues.apache.org/jira/browse/WW-4066

         if (action instanceof ValidationAware) {

             Collection<String> messages = ((ValidationAware) action).getActionMessages();

             messages.add(message);

             ((ValidationAware) action).setActionMessages(messages);

         }

     }

     /**

      * Checks if name of parameter can be accepted or thrown away

      *

      * @param name parameter name

      * @param action current action

      * @return true if parameter is accepted

      */

     protected boolean isAcceptableParameter(String name, Object action) {

         ParameterNameAware parameterNameAware = (action instanceof ParameterNameAware) ? (ParameterNameAware) action : null;

         return acceptableName(name) && (parameterNameAware == null || parameterNameAware.acceptableParameterName(name));

     }

     /**

      * Gets an instance of the comparator to use for the ordered sorting.  Override this

      * method to customize the ordering of the parameters as they are set to the

      * action.

      *

      * @return A comparator to sort the parameters

      */

     protected Comparator<String> getOrderedComparator() {

         return rbCollator;

     }

     protected String getParameterLogMap(Map<String, Object> parameters) {

         if (parameters == null) {

             return "NONE";

         }

         StringBuilder logEntry = new StringBuilder();

         for (Map.Entry entry : parameters.entrySet()) {

             logEntry.append(String.valueOf(entry.getKey()));

             logEntry.append(" => ");

             if (entry.getValue() instanceof Object[]) {

                 Object[] valueArray = (Object[]) entry.getValue();

                 logEntry.append("[ ");

                 if (valueArray.length > 0 ) {

                     for (int indexA = 0; indexA < (valueArray.length - 1); indexA++) {

                         Object valueAtIndex = valueArray[indexA];

                         logEntry.append(String.valueOf(valueAtIndex));

                         logEntry.append(", ");

                     }

                     logEntry.append(String.valueOf(valueArray[valueArray.length - 1]));

                 }

                 logEntry.append(" ] ");

             } else {

                 logEntry.append(String.valueOf(entry.getValue()));

             }

         }

         return logEntry.toString();

     }

     protected boolean acceptableName(String name) {

         boolean accepted = isWithinLengthLimit(name) && !isExcluded(name) && isAccepted(name);

         if (devMode && accepted) { // notify only when in devMode

             LOG.debug("Parameter [#0] was accepted and will be appended to action!", name);

         }

         return accepted;

     }

     protected boolean isWithinLengthLimit( String name ) {

         boolean matchLength = name.length() <= paramNameMaxLength;

         if (!matchLength) {

             notifyDeveloper("Parameter [#0] is too long, allowed length is [#1]", name, String.valueOf(paramNameMaxLength));

         }

         return matchLength;

     }

     protected boolean isAccepted(String paramName) {

         AcceptedPatternsChecker.IsAccepted result = acceptedPatterns.isAccepted(paramName);

         if (result.isAccepted()) {

             return true;

         }

         notifyDeveloper("Parameter [#0] didn't match accepted pattern [#1]!", paramName, result.getAcceptedPattern());

         return false;

     }

     protected boolean isExcluded(String paramName) {

         ExcludedPatternsChecker.IsExcluded result = excludedPatterns.isExcluded(paramName);

         if (result.isExcluded()) {

             notifyDeveloper("Parameter [#0] matches excluded pattern [#1]!", paramName, result.getExcludedPattern());

             return true;

         }

         return false;

     }

     private void notifyDeveloper(String message, String... parameters) {

         if (devMode) {

             LOG.warn(message, parameters);

         } else {

             if (LOG.isDebugEnabled()) {

                 LOG.debug(message, parameters);

             }

         }

     }

     /**

      * Whether to order the parameters or not

      *

      * @return True to order

      */

     public boolean isOrdered() {

         return ordered;

     }

     /**

      * Set whether to order the parameters by object depth or not

      *

      * @param ordered True to order them

      */

     public void setOrdered(boolean ordered) {

         this.ordered = ordered;

     }

     /**

      * Sets a comma-delimited list of regular expressions to match

      * parameters that are allowed in the parameter map (aka whitelist).

      * <p/>

      * Don't change the default unless you know what you are doing in terms

      * of security implications.

      *

      * @param commaDelim A comma-delimited list of regular expressions

      */

     public void setAcceptParamNames(String commaDelim) {

         acceptedPatterns.setAcceptedPatterns(commaDelim);

     }

     /**

      * Sets a comma-delimited list of regular expressions to match

      * parameters that should be removed from the parameter map.

      *

      * @param commaDelim A comma-delimited list of regular expressions

      */

     public void setExcludeParams(String commaDelim) {

         excludedPatterns.setExcludedPatterns(commaDelim);

     }

 }

 <?xml version="1.0" encoding="UTF-8" ?>

 <!DOCTYPE struts PUBLIC

     "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"

     "http://struts.apache.org/dtds/struts-2.3.dtd">

 <struts>

     <constant name="struts.ognl.allowStaticMethodAccess" value="true" />

     <constant name="struts.devMode" value="false" />

     <package name="default" namespace="/" extends="struts-default">

         <global-results>

             <result name="error">/error.jsp</result>

         </global-results>

         <global-exception-mappings>

             <exception-mapping result="error"

                 exception="java.lang.ArithmeticException"></exception-mapping>

         </global-exception-mappings>

         <action name="myAction" class="com.dx.actions.MyAction" method="save">

             <result>/success.jsp</result>

         </action>

     </package>

 </struts>

 /**

  * @author Administrator

  *

  */

 package com.dx.actions;

 public class MyAction {

     private Integer age;

     public Integer getAge() {

         return age;

     }

     public void setAge(Integer age) {

         this.age = age;

     }

     public String save() {

         return "success";

     }

 }

<%@ page language="java" contentType="text/html; charset=UTF-8"

    pageEncoding="UTF-8"%>

<%@ taglib prefix="s" uri="/struts-tags"%>

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">

<html>

<head>

<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">

<title>Insert title here</title>

</head>

<body>

    <s:form action="myAction">

        <s:textfield name="age" label="Age"></s:textfield>

        <s:submit label="提交"></s:submit>

    </s:form>

</body>

</html>

/**

 * @author Administrator

 *

 */

package com.dx.actions;

import com.opensymphony.xwork2.ActionSupport;

public class MyAction extends ActionSupport {

    private Integer age;

    public Integer getAge() {

        return age;

    }

    public void setAge(Integer age) {

        this.age = age;

    }

    public String save() {

        return "success";

    }

}

/*

 * Copyright 2002-2006,2009 The Apache Software Foundation.

 *

 * Licensed 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

 *

 *      http://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 com.opensymphony.xwork2;

import com.opensymphony.xwork2.inject.Container;

import com.opensymphony.xwork2.inject.Inject;

import com.opensymphony.xwork2.util.ValueStack;

import com.opensymphony.xwork2.util.logging.Logger;

import com.opensymphony.xwork2.util.logging.LoggerFactory;

import java.io.Serializable;

import java.util.Arrays;

import java.util.Collection;

import java.util.List;

import java.util.Locale;

import java.util.Map;

import java.util.ResourceBundle;

/**

 * Provides a default implementation for the most common actions.

 * See the documentation for all the interfaces this class implements for more detailed information.

 */

public class ActionSupport implements Action, Validateable, ValidationAware, TextProvider, LocaleProvider, Serializable {

    protected static Logger LOG = LoggerFactory.getLogger(ActionSupport.class);

    private final ValidationAwareSupport validationAware = new ValidationAwareSupport();

    private transient TextProvider textProvider;

    private Container container;

    public void setActionErrors(Collection<String> errorMessages) {

        validationAware.setActionErrors(errorMessages);

    }

    public Collection<String> getActionErrors() {

        return validationAware.getActionErrors();

    }

    public void setActionMessages(Collection<String> messages) {

        validationAware.setActionMessages(messages);

    }

    public Collection<String> getActionMessages() {

        return validationAware.getActionMessages();

    }

    /**

     * @deprecated Use {@link #getActionErrors()}.

     */

    @Deprecated

    public Collection<String> getErrorMessages() {

        return getActionErrors();

    }

    /**

     * @deprecated Use {@link #getFieldErrors()}.

     */

    @Deprecated

    public Map<String, List<String>> getErrors() {

        return getFieldErrors();

    }

    public void setFieldErrors(Map<String, List<String>> errorMap) {

        validationAware.setFieldErrors(errorMap);

    }

    public Map<String, List<String>> getFieldErrors() {

        return validationAware.getFieldErrors();

    }

    public Locale getLocale() {

        ActionContext ctx = ActionContext.getContext();

        if (ctx != null) {

            return ctx.getLocale();

        } else {

            if (LOG.isDebugEnabled()) {

            LOG.debug("Action context not initialized");

            }

            return null;

        }

    }

    public boolean hasKey(String key) {

        return getTextProvider().hasKey(key);

    }

    public String getText(String aTextName) {

        return getTextProvider().getText(aTextName);

    }

    public String getText(String aTextName, String defaultValue) {

        return getTextProvider().getText(aTextName, defaultValue);

    }

    public String getText(String aTextName, String defaultValue, String obj) {

        return getTextProvider().getText(aTextName, defaultValue, obj);

    }

    public String getText(String aTextName, List<?> args) {

        return getTextProvider().getText(aTextName, args);

    }

    public String getText(String key, String[] args) {

        return getTextProvider().getText(key, args);

    }

    public String getText(String aTextName, String defaultValue, List<?> args) {

        return getTextProvider().getText(aTextName, defaultValue, args);

    }

    public String getText(String key, String defaultValue, String[] args) {

        return getTextProvider().getText(key, defaultValue, args);

    }

    public String getText(String key, String defaultValue, List<?> args, ValueStack stack) {

        return getTextProvider().getText(key, defaultValue, args, stack);

    }

    public String getText(String key, String defaultValue, String[] args, ValueStack stack) {

        return getTextProvider().getText(key, defaultValue, args, stack);

    }

    /**

     * Dedicated method to support I10N and conversion errors

     *

     * @param key message which contains formatting string

     * @param expr that should be formatted

     * @return formatted expr with format specified by key

     */

    public String getFormatted(String key, String expr) {

        Map<String, Object> conversionErrors = ActionContext.getContext().getConversionErrors();

        if (conversionErrors.containsKey(expr)) {

            String[] vals = (String[]) conversionErrors.get(expr);

            return vals[0];

        } else {

            final ValueStack valueStack = ActionContext.getContext().getValueStack();

            final Object val = valueStack.findValue(expr);

            return getText(key, Arrays.asList(val));

        }

    }

    public ResourceBundle getTexts() {

        return getTextProvider().getTexts();

    }

    public ResourceBundle getTexts(String aBundleName) {

        return getTextProvider().getTexts(aBundleName);

    }

    public void addActionError(String anErrorMessage) {

        validationAware.addActionError(anErrorMessage);

    }

    public void addActionMessage(String aMessage) {

        validationAware.addActionMessage(aMessage);

    }

    public void addFieldError(String fieldName, String errorMessage) {

        validationAware.addFieldError(fieldName, errorMessage);

    }

    public String input() throws Exception {

        return INPUT;

    }

    /**

     * A default implementation that does nothing an returns "success".

     * <p/>

     * Subclasses should override this method to provide their business logic.

     * <p/>

     * See also {@link com.opensymphony.xwork2.Action#execute()}.

     *

     * @return returns {@link #SUCCESS}

     * @throws Exception can be thrown by subclasses.

     */

    public String execute() throws Exception {

        return SUCCESS;

    }

    public boolean hasActionErrors() {

        return validationAware.hasActionErrors();

    }

    public boolean hasActionMessages() {

        return validationAware.hasActionMessages();

    }

    public boolean hasErrors() {

        return validationAware.hasErrors();

    }

    public boolean hasFieldErrors() {

        return validationAware.hasFieldErrors();

    }

    /**

     * Clears field errors. Useful for Continuations and other situations

     * where you might want to clear parts of the state on the same action.

     */

    public void clearFieldErrors() {

        validationAware.clearFieldErrors();

    }

    /**

     * Clears action errors. Useful for Continuations and other situations

     * where you might want to clear parts of the state on the same action.

     */

    public void clearActionErrors() {

        validationAware.clearActionErrors();

    }

    /**

     * Clears messages. Useful for Continuations and other situations

     * where you might want to clear parts of the state on the same action.

     */

    public void clearMessages() {

        validationAware.clearMessages();

    }

    /**

     * Clears all errors. Useful for Continuations and other situations

     * where you might want to clear parts of the state on the same action.

     */

    public void clearErrors() {

        validationAware.clearErrors();

    }

    /**

     * Clears all errors and messages. Useful for Continuations and other situations

     * where you might want to clear parts of the state on the same action.

     */

    public void clearErrorsAndMessages() {

        validationAware.clearErrorsAndMessages();

    }

    /**

     * A default implementation that validates nothing.

     * Subclasses should override this method to provide validations.

     */

    public void validate() {

    }

    @Override

    public Object clone() throws CloneNotSupportedException {

        return super.clone();

    }

    /**

     * <!-- START SNIPPET: pause-method -->

     * Stops the action invocation immediately (by throwing a PauseException) and causes the action invocation to return

     * the specified result, such as {@link #SUCCESS}, {@link #INPUT}, etc.

     * <p/>

     * <p/>

     * The next time this action is invoked (and using the same continuation ID), the method will resume immediately

     * after where this method was called, with the entire call stack in the execute method restored.

     * <p/>

     * <p/>

     * Note: this method can <b>only</b> be called within the {@link #execute()} method.

     * <!-- END SNIPPET: pause-method -->

     *

     * @param result the result to return - the same type of return value in the {@link #execute()} method.

     */

    public void pause(String result) {

    }

    /**

     * If called first time it will create {@link com.opensymphony.xwork2.TextProviderFactory},

     * inject dependency (if {@link com.opensymphony.xwork2.inject.Container} is accesible) into in,

     * then will create new {@link com.opensymphony.xwork2.TextProvider} and store it in a field

     * for future references and at the returns reference to that field

     *

     * @return reference to field with TextProvider

     */

    private TextProvider getTextProvider() {

        if (textProvider == null) {

            TextProviderFactory tpf = new TextProviderFactory();

            if (container != null) {

                container.inject(tpf);

            }

            textProvider = tpf.createInstance(getClass(), this);

        }

        return textProvider;

    }

    @Inject

    public void setContainer(Container container) {

        this.container = container;

    }

}

/*

 * Copyright 2002-2007,2009 The Apache Software Foundation.

 *

 * Licensed 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

 *

 *      http://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 com.opensymphony.xwork2;

import java.util.Collection;

import java.util.List;

import java.util.Map;

/**

 * ValidationAware classes can accept Action (class level) or field level error messages. Action level messages are kept

 * in a Collection. Field level error messages are kept in a Map from String field name to a List of field error msgs.

 *

 * @author plightbo

 */

public interface ValidationAware {

    /**

     * Set the Collection of Action-level String error messages.

     *

     * @param errorMessages Collection of String error messages

     */

    void setActionErrors(Collection<String> errorMessages);

    /**

     * Get the Collection of Action-level error messages for this action. Error messages should not

     * be added directly here, as implementations are free to return a new Collection or an

     * Unmodifiable Collection.

     *

     * @return Collection of String error messages

     */

    Collection<String> getActionErrors();

    /**

     * Set the Collection of Action-level String messages (not errors).

     *

     * @param messages Collection of String messages (not errors).

     */

    void setActionMessages(Collection<String> messages);

    /**

     * Get the Collection of Action-level messages for this action. Messages should not be added

     * directly here, as implementations are free to return a new Collection or an Unmodifiable

     * Collection.

     *

     * @return Collection of String messages

     */

    Collection<String> getActionMessages();

    /**

     * Set the field error map of fieldname (String) to Collection of String error messages.

     *

     * @param errorMap field error map

     */

    void setFieldErrors(Map<String, List<String>> errorMap);

    /**

     * Get the field specific errors associated with this action. Error messages should not be added

     * directly here, as implementations are free to return a new Collection or an Unmodifiable

     * Collection.

     *

     * @return Map with errors mapped from fieldname (String) to Collection of String error messages

     */

    Map<String, List<String>> getFieldErrors();

    /**

     * Add an Action-level error message to this Action.

     *

     * @param anErrorMessage  the error message

     */

    void addActionError(String anErrorMessage);

    /**

     * Add an Action-level message to this Action.

     *

     * @param aMessage  the message

     */

    void addActionMessage(String aMessage);

    /**

     * Add an error message for a given field.

     *

     * @param fieldName    name of field

     * @param errorMessage the error message

     */

    void addFieldError(String fieldName, String errorMessage);

    /**

     * Check whether there are any Action-level error messages.

     *

     * @return true if any Action-level error messages have been registered

     */

    boolean hasActionErrors();

    /**

     * Checks whether there are any Action-level messages.

     *

     * @return true if any Action-level messages have been registered

     */

    boolean hasActionMessages();

    /**

     * Checks whether there are any action errors or field errors.

     * <p/>

     * <b>Note</b>: that this does not have the same meaning as in WW 1.x.

     *

     * @return <code>(hasActionErrors() || hasFieldErrors())</code>

     */

    boolean hasErrors();

    /**

     * Check whether there are any field errors associated with this action.

     *

     * @return whether there are any field errors

     */

    boolean hasFieldErrors();

}

/*

 * Copyright 2002-2007,2009 The Apache Software Foundation.

 *

 * Licensed 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

 *

 *      http://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 com.opensymphony.xwork2.interceptor;

import com.opensymphony.xwork2.ActionContext;

import com.opensymphony.xwork2.ActionInvocation;

import com.opensymphony.xwork2.ValidationAware;

import com.opensymphony.xwork2.conversion.impl.XWorkConverter;

import com.opensymphony.xwork2.util.ValueStack;

import org.apache.commons.lang3.StringEscapeUtils;

import java.util.HashMap;

import java.util.Map;

/**

 * <!-- START SNIPPET: description -->

 * ConversionErrorInterceptor adds conversion errors from the ActionContext to the Action's field errors.

 *

 * <p/>

 * This interceptor adds any error found in the {@link ActionContext}'s conversionErrors map as a field error (provided

 * that the action implements {@link ValidationAware}). In addition, any field that contains a validation error has its

 * original value saved such that any subsequent requests for that value return the original value rather than the value

 * in the action. This is important because if the value "abc" is submitted and can't be converted to an int, we want to

 * display the original string ("abc") again rather than the int value (likely 0, which would make very little sense to

 * the user).

 *

 *

 * <!-- END SNIPPET: description -->

 *

 * <p/> <u>Interceptor parameters:</u>

 *

 * <!-- START SNIPPET: parameters -->

 *

 * <ul>

 *

 * <li>None</li>

 *

 * </ul>

 *

 * <!-- END SNIPPET: parameters -->

 *

 * <p/> <u>Extending the interceptor:</u>

 *

 * <p/>

 *

 * <!-- START SNIPPET: extending -->

 *

 * Because this interceptor is not web-specific, it abstracts the logic for whether an error should be added. This

 * allows for web-specific interceptors to use more complex logic in the {@link #shouldAddError} method for when a value

 * has a conversion error but is null or empty or otherwise indicates that the value was never actually entered by the

 * user.

 *

 * <!-- END SNIPPET: extending -->

 *

 * <p/> <u>Example code:</u>

 *

 * <pre>

 * <!-- START SNIPPET: example -->

 * &lt;action name="someAction" class="com.examples.SomeAction"&gt;

 *     &lt;interceptor-ref name="params"/&gt;

 *     &lt;interceptor-ref name="conversionError"/&gt;

 *     &lt;result name="success"&gt;good_result.ftl&lt;/result&gt;

 * &lt;/action&gt;

 * <!-- END SNIPPET: example -->

 * </pre>

 *

 * @author Jason Carreira

 */

public class ConversionErrorInterceptor extends AbstractInterceptor {

    public static final String ORIGINAL_PROPERTY_OVERRIDE = "original.property.override";

    protected Object getOverrideExpr(ActionInvocation invocation, Object value) {

        return escape(value);

    }

    protected String escape(Object value) {

        return "\"" + StringEscapeUtils.escapeJava(String.valueOf(value)) + "\"";

    }

    @Override

    public String intercept(ActionInvocation invocation) throws Exception {

        ActionContext invocationContext = invocation.getInvocationContext();

        Map<String, Object> conversionErrors = invocationContext.getConversionErrors();

        ValueStack stack = invocationContext.getValueStack();

        HashMap<Object, Object> fakie = null;

        for (Map.Entry<String, Object> entry : conversionErrors.entrySet()) {

            String propertyName = entry.getKey();

            Object value = entry.getValue();

            if (shouldAddError(propertyName, value)) {

                String message = XWorkConverter.getConversionErrorMessage(propertyName, stack);

                Object action = invocation.getAction();

                if (action instanceof ValidationAware) {

                    ValidationAware va = (ValidationAware) action;

                    va.addFieldError(propertyName, message);

                }

                if (fakie == null) {

                    fakie = new HashMap<Object, Object>();

                }

                fakie.put(propertyName, getOverrideExpr(invocation, value));

            }

        }

        if (fakie != null) {

            // if there were some errors, put the original (fake) values in place right before the result

            stack.getContext().put(ORIGINAL_PROPERTY_OVERRIDE, fakie);

            invocation.addPreResultListener(new PreResultListener() {

                public void beforeResult(ActionInvocation invocation, String resultCode) {

                    Map<Object, Object> fakie = (Map<Object, Object>) invocation.getInvocationContext().get(ORIGINAL_PROPERTY_OVERRIDE);

                    if (fakie != null) {

                        invocation.getStack().setExprOverrides(fakie);

                    }

                }

            });

        }

        return invocation.invoke();

    }

    protected boolean shouldAddError(String propertyName, Object value) {

        return true;

    }

}