// Copyright 2005 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.tapestry.form.validator;
import org.apache.tapestry.IMarkupWriter;
import org.apache.tapestry.IRequestCycle;
import org.apache.tapestry.TapestryUtils;
import org.apache.tapestry.form.FormComponentContributorContext;
import org.apache.tapestry.form.IFormComponent;
import org.apache.tapestry.form.ValidationMessages;
import org.apache.tapestry.util.RegexpMatcher;
import org.apache.tapestry.valid.ValidationConstraint;
import org.apache.tapestry.valid.ValidationStrings;
import org.apache.tapestry.valid.ValidatorException;
/**
* Validates a user input string against a regular expression pattern.
*
* @author Howard Lewis Ship
* @since 4.0
* @see org.apache.tapestry.util.RegexpMatcher
*/
public class Pattern extends BaseValidator
{
// TODO: Possible thread safety issue if the validator
// is shared across threads, because the matcher
// will be too.
private RegexpMatcher _matcher = new RegexpMatcher();
private String _pattern;
public Pattern()
{
}
public Pattern(String initializer)
{
super(initializer);
}
public void validate(IFormComponent field, ValidationMessages messages, Object object)
throws ValidatorException
{
String input = (String) object;
if (!_matcher.matches(_pattern, input))
throw new ValidatorException(buildMessage(messages, field),
ValidationConstraint.PATTERN_MISMATCH);
}
private String buildMessage(ValidationMessages messages, IFormComponent field)
{
return messages.formatValidationMessage(
getMessage(),
ValidationStrings.REGEX_MISMATCH,
new Object[]
{ field.getDisplayName() });
}
public void renderContribution(IMarkupWriter writer, IRequestCycle cycle,
FormComponentContributorContext context, IFormComponent field)
{
context.includeClasspathScript("/org/apache/tapestry/form/validator/RegExValidator.js");
String pattern = _matcher.getEscapedPatternString(_pattern);
String message = buildMessage(context, field);
StringBuffer buffer = new StringBuffer("function(event) { Tapestry.validate_regexp(event, '");
buffer.append(field.getClientId());
buffer.append("', '");
buffer.append(pattern);
buffer.append("', ");
buffer.append(TapestryUtils.enquote(message));
buffer.append("); }");
context.addSubmitHandler(buffer.toString());
}
public void setPattern(String pattern)
{
_pattern = pattern;
}
}