/*
* Copyright (c) 2002-2012 Alibaba Group Holding Limited.
* All rights reserved.
*
* 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.alibaba.citrus.service.form.impl;
import java.util.Map;
import com.alibaba.citrus.expr.ExpressionContext;
import com.alibaba.citrus.service.form.Field;
import com.alibaba.citrus.service.form.Form;
import com.alibaba.citrus.service.form.Group;
import com.alibaba.citrus.service.form.MessageContext;
import com.alibaba.citrus.service.form.Validator;
import com.alibaba.citrus.util.ToStringBuilder;
import com.alibaba.citrus.util.ToStringBuilder.MapBuilder;
import com.alibaba.citrus.util.Utils;
import org.springframework.beans.BeanWrapper;
import org.springframework.beans.BeanWrapperImpl;
import org.springframework.beans.BeansException;
public class MessageContextFactory {
/**
* 设置form级别的错误信息context，包含下列内容：
* <ol>
* <li>所有系统属性：<code>System.getProperties()</code>。</li>
* <li>常用小工具如：<code>stringUtil</code>和<code>stringEscapeUtil</code>等。</li>
* </ol>
*/
public static MessageContext newInstance(final Form form) {
MessageContext formContext = new MessageContext() {
@Override
protected Object internalGet(String key) {
return null;
}
@Override
public ExpressionContext getParentContext() {
return null;
}
@Override
protected void buildToString(ToStringBuilder sb) {
sb.append("FormMessageContext");
}
@Override
protected void buildToString(MapBuilder mb) {
mb.append("form", form);
}
};
Map<String, Object> utils = Utils.getUtils();
formContext.putAll(System.getProperties());
formContext.putAll(utils);
return formContext;
}
/**
* 设置group级别的错误信息context，包含下列内容：
* <ol>
* <li>Form级别的context的所有内容。</li>
* <li><code>form</code>指向当前表单对象</li>
* <li>Group中的所有field。</li>
* </ol>
*/
public static MessageContext newInstance(final Group group) {
MessageContext groupContext = new MessageContext() {
@Override
protected Object internalGet(String key) {
Object value = null;
// 查找fields
value = group.getField(key);
if (value == null) {
if ("form".equals(key)) {
value = group.getForm();
}
}
return value;
}
@Override
public ExpressionContext getParentContext() {
return ((FormImpl) group.getForm()).getMessageContext();
}
@Override
protected void buildToString(ToStringBuilder sb) {
sb.append("GroupMessageContext");
}
@Override
protected void buildToString(MapBuilder mb) {
mb.append("group", group);
}
};
return groupContext;
}
/**
* 设置field级别的错误信息context，包含下列内容：
* <ol>
* <li>Group级别的context的所有内容。</li>
* <li><code>group</code>指向当前组对象</li>
* <li>Field对象的属性，如：<code>displayName</code>、<code>value</code>和
* <code>values</code>、<code>defaultValue</code>和<code>defaultValues</code>。
* </li>
* </ol>
*/
public static MessageContext newInstance(final Field field) {
MessageContext fieldContext = new MessageContext() {
private BeanWrapper fieldWrapper;
@Override
protected Object internalGet(String key) {
if (fieldWrapper == null) {
fieldWrapper = new BeanWrapperImpl(field);
field.getGroup().getForm().getFormConfig().getPropertyEditorRegistrar()
.registerCustomEditors(fieldWrapper);
}
// 在field实例中查找property
try {
return fieldWrapper.getPropertyValue(key);
} catch (BeansException e) {
return null;
}
}
@Override
public ExpressionContext getParentContext() {
return ((GroupImpl) field.getGroup()).getMessageContext();
}
@Override
protected void buildToString(ToStringBuilder sb) {
sb.append("FieldMessageContext");
}
@Override
protected void buildToString(MapBuilder mb) {
mb.append("field", field);
}
};
return fieldContext;
}
/**
* 设置validator级别的错误信息context，包含下列内容：
* <ol>
* <li>Field级别的context的所有内容。</li>
* <li>Validator对象的所有属性。</li>
* </ol>
*/
public static MessageContext newInstance(final Field field, final Validator validator) {
MessageContext validatorContext = new MessageContext() {
private BeanWrapper validatorWrapper;
@Override
protected Object internalGet(String key) {
if (validatorWrapper == null) {
validatorWrapper = new BeanWrapperImpl(validator);
field.getGroup().getForm().getFormConfig().getPropertyEditorRegistrar()
.registerCustomEditors(validatorWrapper);
}
// 在validator object中查找property
try {
return validatorWrapper.getPropertyValue(key);
} catch (BeansException e) {
return null;
}
}
@Override
public ExpressionContext getParentContext() {
return ((FieldImpl) field).getMessageContext();
}
@Override
protected void buildToString(ToStringBuilder sb) {
sb.append("ValidatorMessageContext");
}
@Override
protected void buildToString(MapBuilder mb) {
mb.append("validator", validator);
}
};
return validatorContext;
}
}