jetbrick.template.scripting.JetxLanguageDriver.java Source code

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Here is the source code for jetbrick.template.scripting.JetxLanguageDriver.java

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/**
 *    Copyright 2015 the original author or authors.
 *
 *    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 jetbrick.template.scripting;

import jetbrick.template.JetEngine;
import jetbrick.template.JetTemplate;

import org.apache.ibatis.executor.parameter.ParameterHandler;
import org.apache.ibatis.mapping.BoundSql;
import org.apache.ibatis.mapping.MappedStatement;
import org.apache.ibatis.mapping.SqlSource;
import org.apache.ibatis.parsing.XNode;
import org.apache.ibatis.scripting.LanguageDriver;
import org.apache.ibatis.scripting.defaults.DefaultParameterHandler;
import org.apache.ibatis.session.Configuration;

/**
 * Adds FreeMarker templates support to scripting in MyBatis.
 * If you want to change or extend template loader configuration, use can
 * inherit from this class and override {@link #createFreeMarkerConfiguration()} method.
 *
 * @author huangx
 */
public class JetxLanguageDriver implements LanguageDriver {
    private JetEngine engine;

    public JetxLanguageDriver() {
        this.engine = JetEngineHolder.getJetEngine();
    }

    /**
     * Creates a {@link ParameterHandler} that passes the actual parameters to the the JDBC statement.
     *
     * @see DefaultParameterHandler
     * @param mappedStatement The mapped statement that is being executed
     * @param parameterObject The input parameter object (can be null)
     * @param boundSql The resulting SQL once the dynamic language has been executed.
     */
    @Override
    public ParameterHandler createParameterHandler(MappedStatement mappedStatement, Object parameterObject,
            BoundSql boundSql) {
        // As default XMLLanguageDriver
        return new DefaultParameterHandler(mappedStatement, parameterObject, boundSql);
    }

    /**
     * Creates an {@link SqlSource} that will hold the statement read from a mapper xml file.
     * It is called during startup, when the mapped statement is read from a class or an xml file.
     *
     * @param configuration The MyBatis configuration
     * @param script XNode parsed from a XML file
     * @param parameterType input parameter type got from a mapper method or specified in the parameterType xml attribute. Can be null.
     */
    @Override
    public SqlSource createSqlSource(Configuration configuration, XNode script, Class<?> parameterType) {
        return createSqlSource(configuration, script.getNode().getTextContent());
    }

    /**
     * Creates an {@link SqlSource} that will hold the statement read from an annotation.
     * It is called during startup, when the mapped statement is read from a class or an xml file.
     *
     * @param configuration The MyBatis configuration
     * @param script The content of the annotation
     * @param parameterType input parameter type got from a mapper method or specified in the parameterType xml attribute. Can be null.
     */
    @Override
    public SqlSource createSqlSource(Configuration configuration, String script, Class<?> parameterType) {
        return createSqlSource(configuration, script);
    }

    protected SqlSource createSqlSource(JetTemplate template, Configuration configuration) {
        return new JetxSqlSource(template, configuration);
    }

    private SqlSource createSqlSource(Configuration configuration, String scriptText) {
        JetTemplate template;
        scriptText = scriptText.trim();
        if (scriptText.contains(" ")) {
            template = engine.createTemplate(scriptText);
        } else {
            //  sql 
            if (scriptText.startsWith("&")) {
                scriptText = scriptText.substring(1);
            }
            template = engine.getTemplate(scriptText + engine.getConfig().getTemplateSuffix());
        }

        return createSqlSource(template, configuration);
    }
}