com.linju.framework.pager.parser.impl.AbstractParser.java Source code

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Here is the source code for com.linju.framework.pager.parser.impl.AbstractParser.java

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/*
 * The MIT License (MIT)
 *
 * Copyright (c) 2014 abel533@gmail.com
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

package com.linju.framework.pager.parser.impl;

import com.linju.framework.pager.Constant;
import com.linju.framework.pager.Dialect;
import com.linju.framework.pager.Page;
import com.linju.framework.pager.parser.Parser;
import com.linju.framework.pager.parser.SqlParser;
import com.linju.framework.pager.sqlsource.PageProviderSqlSource;
import org.apache.ibatis.mapping.BoundSql;
import org.apache.ibatis.mapping.MappedStatement;
import org.apache.ibatis.mapping.ParameterMapping;
import org.apache.ibatis.reflection.MetaObject;
import org.apache.ibatis.reflection.SystemMetaObject;
import org.apache.ibatis.session.Configuration;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

/**
 * @author liuzh
 */
public abstract class AbstractParser implements Parser, Constant {
    //?SQL
    public static final SqlParser sqlParser = new SqlParser();

    public static Parser newParser(Dialect dialect) {
        Parser parser = null;
        switch (dialect) {
        case mysql:
        case mariadb:
        case sqlite:
            parser = new MysqlParser();
            break;
        default:
            break;
        }
        return parser;
    }

    @Override
    public boolean isSupportedMappedStatementCache() {
        return true;
    }

    public String getCountSql(final String sql) {
        return sqlParser.getSmartCountSql(sql);
    }

    public abstract String getPageSql(String sql);

    public List<ParameterMapping> getPageParameterMapping(Configuration configuration, BoundSql boundSql) {
        List<ParameterMapping> newParameterMappings = new ArrayList<ParameterMapping>();
        if (boundSql.getParameterMappings() != null) {
            newParameterMappings.addAll(boundSql.getParameterMappings());
        }
        newParameterMappings
                .add(new ParameterMapping.Builder(configuration, PAGEPARAMETER_FIRST, Integer.class).build());
        newParameterMappings
                .add(new ParameterMapping.Builder(configuration, PAGEPARAMETER_SECOND, Integer.class).build());
        return newParameterMappings;
    }

    public Map setPageParameter(MappedStatement ms, Object parameterObject, BoundSql boundSql, Page page) {
        Map paramMap = null;
        if (parameterObject == null) {
            paramMap = new HashMap();
        } else if (parameterObject instanceof Map) {
            paramMap = (Map) parameterObject;
        } else {
            paramMap = new HashMap();
            //?sql??ParameterMapping?getter
            //TypeHandlerRegistry???
            boolean hasTypeHandler = ms.getConfiguration().getTypeHandlerRegistry()
                    .hasTypeHandler(parameterObject.getClass());
            MetaObject metaObject = SystemMetaObject.forObject(parameterObject);
            //??MyProviderSqlSource?
            if (ms.getSqlSource() instanceof PageProviderSqlSource) {
                paramMap.put(PROVIDER_OBJECT, parameterObject);
            }
            if (!hasTypeHandler) {
                for (String name : metaObject.getGetterNames()) {
                    paramMap.put(name, metaObject.getValue(name));
                }
            }
            //????
            if (boundSql.getParameterMappings() != null && boundSql.getParameterMappings().size() > 0) {
                for (ParameterMapping parameterMapping : boundSql.getParameterMappings()) {
                    String name = parameterMapping.getProperty();
                    if (!name.equals(PAGEPARAMETER_FIRST) && !name.equals(PAGEPARAMETER_SECOND)
                            && paramMap.get(name) == null) {
                        if (hasTypeHandler || parameterMapping.getJavaType().equals(parameterObject.getClass())) {
                            paramMap.put(name, parameterObject);
                            break;
                        }
                    }
                }
            }
        }
        //?
        paramMap.put(ORIGINAL_PARAMETER_OBJECT, parameterObject);
        return paramMap;
    }
}