001 // Copyright 2005 The Apache Software Foundation
002 //
003 // Licensed under the Apache License, Version 2.0 (the "License");
004 // you may not use this file except in compliance with the License.
005 // You may obtain a copy of the License at
006 //
007 // http://www.apache.org/licenses/LICENSE-2.0
008 //
009 // Unless required by applicable law or agreed to in writing, software
010 // distributed under the License is distributed on an "AS IS" BASIS,
011 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
012 // See the License for the specific language governing permissions and
013 // limitations under the License.
014
015 package org.apache.tapestry.form.validator;
016
017 import java.util.Date;
018
019 import org.apache.tapestry.IMarkupWriter;
020 import org.apache.tapestry.IRequestCycle;
021 import org.apache.tapestry.form.FormComponentContributorContext;
022 import org.apache.tapestry.form.IFormComponent;
023 import org.apache.tapestry.form.ValidationMessages;
024 import org.apache.tapestry.form.translator.DateTranslator;
025 import org.apache.tapestry.json.JSONLiteral;
026 import org.apache.tapestry.json.JSONObject;
027 import org.apache.tapestry.valid.ValidationConstants;
028 import org.apache.tapestry.valid.ValidationConstraint;
029 import org.apache.tapestry.valid.ValidationStrings;
030 import org.apache.tapestry.valid.ValidatorException;
031
032 /**
033 * Expects the value to be a {@link Date}, and constrains the date to follow a particular date.
034 *
035 * @author Howard M. Lewis Ship
036 * @since 4.0
037 */
038
039 public class MinDate extends BaseValidator
040 {
041 private Date _minDate;
042
043 public MinDate()
044 {
045 }
046
047 public MinDate(String initializer)
048 {
049 super(initializer);
050 }
051
052 public void setMinDate(Date minDate)
053 {
054 _minDate = minDate;
055 }
056
057 public Date getMinDate()
058 {
059 return _minDate;
060 }
061
062 public void validate(IFormComponent field, ValidationMessages messages, Object object)
063 throws ValidatorException
064 {
065 Date date = (Date) object;
066 DateTranslator translator = (DateTranslator) getFieldTranslator(field, DateTranslator.class);
067
068 if (date.before(_minDate))
069 throw new ValidatorException(buildMessage(messages, field, translator), ValidationConstraint.TOO_SMALL);
070
071 }
072
073 private String buildMessage(ValidationMessages messages, IFormComponent field,
074 DateTranslator translator)
075 {
076 return messages.formatValidationMessage(
077 getMessage(),
078 ValidationStrings.DATE_TOO_EARLY,
079 new Object[] { field.getDisplayName(),
080 (translator != null) ?
081 translator.format(field, messages.getLocale(), _minDate) : _minDate.toString()});
082 }
083
084 public void renderContribution(IMarkupWriter writer, IRequestCycle cycle,
085 FormComponentContributorContext context, IFormComponent field)
086 {
087 // TODO: This is a little hacky, but validators need to be able to cooperate
088 // with translators during client side validation as well
089 DateTranslator translator = (DateTranslator) getFieldTranslator(field, DateTranslator.class);
090 if (translator == null)
091 return;
092
093 JSONObject profile = context.getProfile();
094
095 context.addInitializationScript(field, "dojo.require(\"tapestry.form.datetime\");");
096
097 if (!profile.has(ValidationConstants.CONSTRAINTS)) {
098 profile.put(ValidationConstants.CONSTRAINTS, new JSONObject());
099 }
100 JSONObject cons = profile.getJSONObject(ValidationConstants.CONSTRAINTS);
101
102 accumulateProperty(cons, field.getClientId(),
103 new JSONLiteral("[tapestry.form.datetime.isValidDate,{"
104 + "min:"
105 + JSONObject.quote(translator.format(field, context.getLocale(), _minDate))
106 + ","
107 + "datePattern:"
108 + JSONObject.quote(translator.getPattern())
109 + (translator.isLenient() ? "" : ",strict:true")
110 + "}]"));
111
112 accumulateProfileProperty(field, profile,
113 ValidationConstants.CONSTRAINTS, buildMessage(context, field, translator));
114 }
115 }