org.mybatis.scripting.velocity.SQLScriptSource.java Source code

Introduction

Here is the source code for org.mybatis.scripting.velocity.SQLScriptSource.java

Source

/*
 * Copyright 2012 MyBatis.org.
 *
 * 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 org.mybatis.scripting.velocity;

import java.util.HashMap;
import java.util.Map;
import org.apache.ibatis.mapping.BoundSql;
import org.apache.ibatis.mapping.ParameterMapping;
import org.apache.ibatis.mapping.SqlSource;
import org.apache.ibatis.session.Configuration;

public class SQLScriptSource implements SqlSource {

    protected static final String PARAMETER_OBJECT_KEY = "_parameter";
    protected static final String DATABASE_ID_KEY = "_databaseId";
    protected static final String MAPPING_COLLECTOR_KEY = "_pmc";

    private static int templateIndex = 0;

    private final ParameterMapping[] parameterMappingSources;
    private final Object compiledScript;
    private final Configuration configuration;

    public SQLScriptSource(Configuration configuration, String script, Class<?> parameterTypeClass) {
        this.configuration = configuration;
        ParameterMappingSourceParser mappingParser = new ParameterMappingSourceParser(configuration, script,
                parameterTypeClass);
        parameterMappingSources = mappingParser.getParameterMappingSources();
        script = mappingParser.getSql();
        compiledScript = VelocityFacade.compile(script, "velocity-template-" + (++templateIndex));
    }

    @Override
    public BoundSql getBoundSql(Object parameterObject) {

        final Map<String, Object> context = new HashMap<String, Object>();
        final ParameterMappingCollector pmc = new ParameterMappingCollector(parameterMappingSources, context,
                configuration);

        context.put(DATABASE_ID_KEY, configuration.getDatabaseId());
        context.put(PARAMETER_OBJECT_KEY, parameterObject);
        context.put(MAPPING_COLLECTOR_KEY, pmc);

        final String sql = VelocityFacade.apply(compiledScript, context);
        BoundSql boundSql = new BoundSql(configuration, sql, pmc.getParameterMappings(), parameterObject);
        for (Map.Entry<String, Object> entry : context.entrySet()) {
            boundSql.setAdditionalParameter(entry.getKey(), entry.getValue());
        }

        return boundSql;

    }

}