com.mybatis.jpa.definition.template.UpdateSelectiveSqlTemplate Maven / Gradle / Ivy

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package com.mybatis.jpa.definition.template;

import com.mybatis.jpa.util.ColumnMetaResolver;
import com.mybatis.jpa.util.PersistentUtil;

import java.lang.reflect.Field;

/**
 * @author svili
 **/
public class UpdateSelectiveSqlTemplate implements SqlTemplate {

    @Override
    public String parseSQL(Class type) {
        // columns
        StringBuilder sets = new StringBuilder();
        sets.append(" ");
        for (Field field : PersistentUtil.getPersistentFields(type)) {

            sets.append(" ");
            // columnName = #{ }

            sets.append(PersistentUtil.getColumnName(field)).append(" = ")
                    .append(ColumnMetaResolver.resolveSqlPlaceholder(field)).append(" , ");
            sets.append(" ");
        }

        sets.append(" ");

        return "UPDATE " + PersistentUtil.getTableName(type) + " set " + sets.toString();
    }

}