/*
* Copyright 1999-2004 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 org.apache.cocoon.transformation.helpers;
import org.apache.avalon.framework.configuration.Configuration;
import org.apache.avalon.framework.configuration.ConfigurationException;
import org.apache.avalon.framework.configuration.SAXConfigurationHandler;
import org.apache.excalibur.source.Source;
import org.apache.cocoon.Constants;
import org.apache.cocoon.acting.ConfigurationHelper;
import org.apache.cocoon.acting.ValidatorActionResult;
import org.apache.cocoon.components.source.SourceUtil;
import org.apache.cocoon.environment.ObjectModelHelper;
import org.apache.cocoon.environment.Request;
import org.apache.cocoon.environment.SourceResolver;
import org.apache.avalon.framework.logger.Logger;
import java.util.HashMap;
import java.util.Map;
/**
* The <code>ValidatorActionResult</code> object helper
*
* @author <a href="mailto:haul@apache.org">Christian Haul</a>
* @version CVS $Id: FormValidatorHelper.java,v 1.2 2004/03/10 15:19:32 unico Exp $
*/
public class FormValidatorHelper {
private static Map configurations = new HashMap();
/**
* these make it easier for the xsl
*/
String current_descriptor = null;
boolean current_reloadable = true;
Logger current_logger = null;
String current_constraint_set = null;
String current_parameter = null;
SourceResolver current_resolver = null;
public FormValidatorHelper(String descriptor, boolean reloadable,
Logger logger, SourceResolver resolver) {
current_descriptor = descriptor;
current_reloadable = reloadable;
current_logger = logger;
current_resolver = resolver;
}
public FormValidatorHelper(String descriptor, boolean reloadable,
Logger logger, SourceResolver resolver,
String constraintset) {
current_descriptor = descriptor;
current_reloadable = reloadable;
current_logger = logger;
current_resolver = resolver;
current_constraint_set = constraintset;
}
/**
* keep track of current parameter context
*/
public void setParameter(String parameter) {
current_parameter = parameter;
}
/**
* keep track of current constraint-set context
* (probably this is not needed?)
*/
public void setConstraintSet(String constraintset) {
current_constraint_set = constraintset;
}
/**
* Get the specified attribute
*
* @param objectModel The Map objectModel
* @param name The parameter name
*/
public static Object getAttribute(Map objectModel, String name) {
Request request = ObjectModelHelper.getRequest(objectModel);
return request.getAttribute(name);
}
/**
* Extracts the validation results from the request attribute
*
* @param objectModel The Map objectModel
* @return Map with ValidatorActionResults
* @see org.apache.cocoon.acting.ValidatorActionResult
*/
public static Map getResults(Map objectModel) {
Request request = ObjectModelHelper.getRequest(objectModel);
return (Map) request.getAttribute(Constants.XSP_FORMVALIDATOR_PATH);
}
/**
* Extracts the validation results from the request attribute
* for a specific request parameter
*
* @param objectModel The Map objectModel
* @param name Request parameter's name
* @see org.apache.cocoon.acting.ValidatorActionResult
*/
public static ValidatorActionResult getParamResult(Map objectModel,
String name) {
ValidatorActionResult result = ValidatorActionResult.NOTPRESENT;
Map param_result = getResults(objectModel);
if (param_result != null) {
result = (ValidatorActionResult) param_result.get(name);
}
return (result != null? result : ValidatorActionResult.NOTPRESENT);
}
/**
* Extracts the validation results from the request attribute
* for the context's current request parameter
*
* @param objectModel The Map objectModel
* @see org.apache.cocoon.acting.ValidatorActionResult
*/
public ValidatorActionResult getParamResult(Map objectModel) {
ValidatorActionResult result = ValidatorActionResult.NOTPRESENT;
Map param_result = getResults(objectModel);
if (param_result != null) {
result = (ValidatorActionResult) param_result.get(current_parameter);
}
return (result != null? result : ValidatorActionResult.NOTPRESENT);
}
/**
* Test whether the validation returned no error for this
* parameter.
*
* @param objectModel The Map objectModel
* @param name Request parameter's name
* @return true only if the parameter was validated and the validation
* did not return an error.
*/
public static boolean isOK(Map objectModel, String name) {
return getParamResult(objectModel, name).equals(ValidatorActionResult.OK);
}
/**
* Test whether the validation returned no error for the
* context's current parameter.
*
* @param objectModel The Map objectModel
* @return true only if the parameter was validated and the validation
* did not return an error.
*/
public boolean isOK(Map objectModel) {
return isOK(objectModel, current_parameter);
}
/**
* Test whether the validation returned an error for this
* parameter.
*
* @param objectModel The Map objectModel
* @param name Request parameter's name
* @return true if the parameter was either not validated or the validation
* returned an error.
*/
public static boolean isError(Map objectModel, String name) {
return getParamResult(objectModel, name).ge(ValidatorActionResult.ERROR);
}
/**
* Test whether the validation returned an error for the
* context's current parameter.
*
* @param objectModel The Map objectModel
* @return true if the parameter was either not validated or the validation
* returned an error.
*/
public boolean isError(Map objectModel) {
return isError(objectModel, current_parameter);
}
/**
* Test whether the validated parameter was null but wasn't allowed to.
*
* @param objectModel The Map objectModel
* @param name Request parameter's name
* @return true if the parameter was validated and the validation
* returned an error because the parameter was null but wasn't allowd to.
*/
public static boolean isNull(Map objectModel, String name) {
return getParamResult(objectModel, name).equals(ValidatorActionResult.ISNULL);
}
/**
* Test whether the context's current parameter as validated was null but
* wasn't allowed to.
*
* @param objectModel The Map objectModel
* @return true if the parameter was validated and the validation
* returned an error because the parameter was null but wasn't allowd to.
*/
public boolean isNull(Map objectModel) {
return isNull(objectModel, current_parameter);
}
/**
* Test whether the validated parameter was too small.
*
* @param objectModel The Map objectModel
* @param name Request parameter's name
* @return true if the parameter was validated and the validation
* returned an error because either its value or its length was
* too small.
*/
public static boolean isTooSmall(Map objectModel, String name) {
boolean ok = getParamResult(objectModel, name).equals(ValidatorActionResult.TOOSMALL);
if (!ok) {
ok = isNull(objectModel, name);
}
return ok;
}
/**
* Test whether the context's current parameter was too small.
*
* @param objectModel The Map objectModel
* @return true if the parameter was validated and the validation
* returned an error because either its value or its length was
* too small.
*/
public boolean isTooSmall(Map objectModel) {
return isTooSmall(objectModel, current_parameter);
}
/**
* Test whether the validated parameter was too large.
*
* @param objectModel The Map objectModel
* @param name Request parameter's name
* @return true if the parameter was validated and the validation
* returned an error because either its value or its length was
* too large.
*/
public static boolean isTooLarge(Map objectModel, String name) {
return (getParamResult(objectModel, name) == ValidatorActionResult.TOOLARGE);
}
/**
* Test whether the context's current parameter was too large.
*
* @param objectModel The Map objectModel
* @return true if the parameter was validated and the validation
* returned an error because either its value or its length was
* too large.
*/
public boolean isTooLarge(Map objectModel) {
return isTooLarge(objectModel, current_parameter);
}
/**
* Test whether the validated parameter wasn't matched by the requested
* regular expression.
*
* @param objectModel The Map objectModel
* @param name Request parameter's name
* @return true if the parameter was validated and the validation
* returned an error because its value wasn't matched by the requested
* regular expression.
*/
public static boolean isNoMatch(Map objectModel, String name) {
return getParamResult(objectModel, name).equals(ValidatorActionResult.NOMATCH);
}
/**
* Test whether the context's current parameter wasn't matched by the requested
* regular expression.
*
* @param objectModel The Map objectModel
* @return true if the parameter was validated and the validation
* returned an error because its value wasn't matched by the requested
* regular expression.
*/
public boolean isNoMatch(Map objectModel) {
return isNoMatch(objectModel, current_parameter);
}
/**
* Test whether the validated parameter wasn't validated
*
* @param objectModel The Map objectModel
* @param name Request parameter's name
* @return true if the parameter was not validated.
*/
public static boolean isNotPresent(Map objectModel, String name) {
return getParamResult(objectModel, name).equals(ValidatorActionResult.NOTPRESENT);
}
/**
* Test whether the context's current parameter wasn't validated
*
* @param objectModel The Map objectModel
* @return true if the parameter was not validated.
*/
public boolean isNotPresent(Map objectModel) {
return isNotPresent(objectModel, current_parameter);
}
/**
* Set up the complementary configuration file. Please note that
* multiple Actions can share the same configurations. By using
* this approach, we can limit the number of config files.
* Also note that the configuration file does not have to be a file.
*
* This is based on the similar named functions in
* org.apache.cocoon.acting.AbstractComplimentaryConfigurableAction
* with the addition of reloadable configuration files, reloadable
* flagg, manager, and logger parameter.
*
* @param descriptor URL of descriptor.xml file @see org.apache.cocoon.acting.AbstractComplimentaryConfigurableAction
* @param resolver
* @param reloadable set to <code>true</code> if changes of
* <code>descriptor</code> should trigger a reload. Note that this
* only works if <code>Source</code> is able to determine the
* modification time @see org.apache.cocoon.environment.Source
* @param logger used to send debug and error messages to
* @return up-to-date configuration, either (re)loaded or cached.
*/
protected static Configuration getConfiguration(String descriptor, SourceResolver resolver,
boolean reloadable, Logger logger)
throws ConfigurationException {
if (descriptor == null) {
throw new ConfigurationException("The form descriptor is not set!");
}
ConfigurationHelper conf = null;
synchronized (FormValidatorHelper.configurations) {
Source source = null;
try {
source = resolver.resolveURI(descriptor);
conf = (ConfigurationHelper) FormValidatorHelper.configurations.get(source.getURI());
if (conf == null || (reloadable && conf.lastModified != source.getLastModified())) {
logger.debug("(Re)Loading " + descriptor);
if (conf == null) {
conf = new ConfigurationHelper();
}
SAXConfigurationHandler builder = new SAXConfigurationHandler();
SourceUtil.toSAX(source, builder);
conf.lastModified = source.getLastModified();
conf.configuration = builder.getConfiguration();
FormValidatorHelper.cacheConfiguration(source.getURI(), conf);
} else {
logger.debug("Using cached configuration for " + descriptor);
}
} catch (Exception e) {
logger.error("Could not configure Database mapping environment", e);
throw new ConfigurationException("Error trying to load configurations for resource: " + source.getURI());
} finally {
resolver.release(source);
}
}
return conf.configuration;
}
/**
* Cache the configuration so that we can use it later.
*/
private static void cacheConfiguration(String descriptor, ConfigurationHelper conf) {
synchronized (FormValidatorHelper.configurations) {
FormValidatorHelper.configurations.put(descriptor, conf);
}
}
/**
* Iterate over a set of configurations and return the one whose
* name matches the given one.
*
* @param conf set of configurations
* @param name name of configuration
* @param logger
* @return specified configuration or <code>null</code> if not found.
*/
protected static Configuration getConfigurationByName(Configuration[] conf,
String name,
Logger logger
) {
int j = 0;
boolean found = false;
String setname = null;
for (j = 0; j < conf.length; j++) {
setname = conf[j].getAttribute("name", "");
if (name.trim().equals(setname.trim())) {
found = true;
break;
}
}
if (!found) {
logger.debug("FormValidatorHelper.getConfigurationByName: configuration " + name + " not found.");
return null;
}
return conf[j];
}
/**
* Get an attribute for a parameter as specified in
* descriptor.xml.
*
* @param descriptor URL of descriptor.xml file @see org.apache.cocoon.acting.AbstractComplimentaryConfigurableAction
* @param resolver
* @param reloadable set to <code>true</code> if changes of
* <code>descriptor</code> should trigger a reload. Note that this
* only works if <code>Source</code> is able to determine the
* modification time @see org.apache.cocoon.environment.Source
* @param logger used to send debug and error messages to
* @param attribute attribute name
* @return attribute value or <code>null</code>
*/
public static String getParameterAttributes(String descriptor,
SourceResolver resolver,
boolean reloadable,
String constraintset,
String parameter,
String attribute,
Logger logger
) {
try {
Configuration conf = getConfiguration(descriptor, resolver, reloadable, logger);
Configuration[] desc = conf.getChildren("parameter");
Configuration[] csets = conf.getChildren("constraint-set");
Configuration cset = getConfigurationByName(csets, constraintset, logger);
Configuration[] set = cset.getChildren("validate");
Configuration constraints = getConfigurationByName(set, parameter, logger);
Configuration descr = getConfigurationByName(desc, parameter, logger);
return constraints.getAttribute(attribute, descr.getAttribute(attribute, ""));
} catch (Exception e) {
logger.debug("FormValidatorHelper.getParameterAttributes Exception " + e);
}
return "";
}
/**
* Get an attribute for the context's current parameter as specified in
* descriptor.xml.
*
* @param attribute attribute name
* @return attribute value or <code>null</code>
*/
public String getParameterAttribute(String attribute) {
return FormValidatorHelper.getParameterAttributes(current_descriptor,
current_resolver,
current_reloadable,
current_constraint_set,
current_parameter,
attribute,
current_logger);
}
/**
* Get an attribute for a parameter as specified in
* descriptor.xml.
*
* @param attribute attribute name
* @return attribute value or <code>null</code>
*/
public String getParameterAttribute(String parameter, String attribute) {
return FormValidatorHelper.getParameterAttributes(current_descriptor,
current_resolver,
current_reloadable,
current_constraint_set,
parameter,
attribute,
current_logger);
}
}