/*
* 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.support;
import static com.alibaba.citrus.util.Assert.*;
import static com.alibaba.citrus.util.CollectionUtil.*;
import static java.util.Collections.*;
import java.util.List;
import java.util.ListIterator;
import com.alibaba.citrus.service.form.MessageContext;
import com.alibaba.citrus.service.form.Validator;
import com.alibaba.citrus.service.form.configuration.FieldConfig;
import com.alibaba.citrus.service.form.impl.MessageContextFactory;
import com.alibaba.citrus.service.form.impl.ValidatorContextImpl;
/**
* 组合式的validator基类。
*
* @author Michael Zhou
*/
public abstract class AbstractCompositeValidator extends AbstractValidator {
private final List<Validator> validators = createLinkedList();
private final List<Validator> validatorList = unmodifiableList(validators);
/** 取得子validators。 */
public List<Validator> getValidators() {
return validatorList;
}
/** 设置子validators。 */
public void setValidators(List<Validator> validators) {
this.validators.clear();
if (validators != null) {
for (Validator validator : validators) {
this.validators.add(assertNotNull(validator, "validator"));
}
}
}
/**
* 当GroupConfig被初始化完成以后被调用，此时可取得同组中其它的fields。
* <p>
* 所有validator的同名方法将被调用。
* </p>
*/
@Override
public void init(FieldConfig fieldConfig) throws Exception {
super.init(fieldConfig);
for (Validator validator : validators) {
validator.init(fieldConfig);
}
}
/** 深度复制validators。 */
@Override
public Validator clone() {
AbstractCompositeValidator copy = (AbstractCompositeValidator) super.clone();
for (ListIterator<Validator> i = copy.validators.listIterator(); i.hasNext(); ) {
i.set(i.next().clone());
}
return copy;
}
/** 创建一个和指定validator相关的context。 */
protected final Context newContext(Context context, Validator validator) {
return newContext(context, validator, context.getValue());
}
/** 创建一个和指定validator相关的context，使用指定的value。 */
protected final Context newContext(Context context, Validator validator, Object value) {
MessageContext expressionContext = MessageContextFactory.newInstance(context.getField(), validator);
expressionContext.copyLocalContext(context.getMessageContext());
return new ValidatorContextImpl(expressionContext, context.getField(), value);
}
}