package com.alibaba.tamper.process;
import org.apache.commons.lang.StringUtils;
import com.alibaba.tamper.core.BeanMappingException;
import com.alibaba.tamper.core.config.BeanMappingField;
import com.alibaba.tamper.core.process.ValueProcess;
import com.alibaba.tamper.core.process.ValueProcessInvocation;
import com.alibaba.tamper.process.convertor.Convertor;
import com.alibaba.tamper.process.convertor.ConvertorHelper;
/**
* mapping默认值的处理，get流程处理
*
* @author jianghang 2011-5-27 下午09:19:46
*/
public class DefaultValueValueProcess implements ValueProcess {
@Override
public Object process(Object value, ValueProcessInvocation invocation) throws BeanMappingException {
// 处理下自己的业务
BeanMappingField currentField = invocation.getContext().getCurrentField();
if (value == null && StringUtils.isNotEmpty(currentField.getDefaultValue())
&& currentField.isMapping() == false) {
if (currentField.getSrcField().getClazz() != null) {// 有指定对应的SrcClass
Convertor convertor = ConvertorHelper.getInstance().getConvertor(String.class,
currentField.getSrcField().getClazz());
if (convertor != null) {
// 先对String字符串进行一次转化
value = convertor.convert(currentField.getDefaultValue(), currentField.getSrcField().getClazz());
}
}
if (value == null) {
// 不存在对默认值处理的convertor，不予处理，后续尝试下自定义的convertor
value = currentField.getDefaultValue();
}
}
return invocation.proceed(value);
}
}