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/*
 * Copyright 2002-2007 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 org.springframework.jdbc.object;

import org.springframework.jdbc.core.PreparedStatementCreator;
import org.springframework.jdbc.core.PreparedStatementCreatorFactory;
import org.springframework.jdbc.core.PreparedStatementSetter;
import org.springframework.jdbc.core.namedparam.NamedParameterUtils;
import org.springframework.jdbc.core.namedparam.ParsedSql;

/**
 * Operation object representing a SQL-based operation such as a query or update,
 * as opposed to a stored procedure.
 *
 * 

Configures a {@link org.springframework.jdbc.core.PreparedStatementCreatorFactory} * based on the declared parameters. * * @author Rod Johnson * @author Juergen Hoeller */ public abstract class SqlOperation extends RdbmsOperation { /** * Object enabling us to create PreparedStatementCreators efficiently, * based on this class's declared parameters. */ private PreparedStatementCreatorFactory preparedStatementFactory; /** Parsed representation of the SQL statement */ private ParsedSql cachedSql; /** Monitor for locking the cached representation of the parsed SQL statement */ private final Object parsedSqlMonitor = new Object(); /** * Overridden method to configure the PreparedStatementCreatorFactory * based on our declared parameters. */ protected final void compileInternal() { this.preparedStatementFactory = new PreparedStatementCreatorFactory(getSql(), getDeclaredParameters()); this.preparedStatementFactory.setResultSetType(getResultSetType()); this.preparedStatementFactory.setUpdatableResults(isUpdatableResults()); this.preparedStatementFactory.setReturnGeneratedKeys(isReturnGeneratedKeys()); if (getGeneratedKeysColumnNames() != null) { this.preparedStatementFactory.setGeneratedKeysColumnNames(getGeneratedKeysColumnNames()); } this.preparedStatementFactory.setNativeJdbcExtractor(getJdbcTemplate().getNativeJdbcExtractor()); onCompileInternal(); } /** * Hook method that subclasses may override to post-process compilation. * This implementation does nothing. * @see #compileInternal */ protected void onCompileInternal() { } /** * Obtain a parsed representation of this operation's SQL statement. *

Typically used for named parameter parsing. */ protected ParsedSql getParsedSql() { synchronized (this.parsedSqlMonitor) { if (this.cachedSql == null) { this.cachedSql = NamedParameterUtils.parseSqlStatement(getSql()); } return this.cachedSql; } } /** * Return a PreparedStatementSetter to perform an operation * with the given parameters. * @param params the parameter array (may be null) */ protected final PreparedStatementSetter newPreparedStatementSetter(Object[] params) { return this.preparedStatementFactory.newPreparedStatementSetter(params); } /** * Return a PreparedStatementCreator to perform an operation * with the given parameters. * @param params the parameter array (may be null) */ protected final PreparedStatementCreator newPreparedStatementCreator(Object[] params) { return this.preparedStatementFactory.newPreparedStatementCreator(params); } /** * Return a PreparedStatementCreator to perform an operation * with the given parameters. * @param sqlToUse the actual SQL statement to use (if different from * the factory's, for example because of named parameter expanding) * @param params the parameter array (may be null) */ protected final PreparedStatementCreator newPreparedStatementCreator(String sqlToUse, Object[] params) { return this.preparedStatementFactory.newPreparedStatementCreator(sqlToUse, params); } }





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