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/*
 * Copyright (c) 2012-2019 Snowflake Computing Inc. All rights reserved.
 */

package net.snowflake.client.core;

import java.sql.SQLException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import net.snowflake.client.jdbc.ErrorCode;
import net.snowflake.client.jdbc.SnowflakeSQLException;
import net.snowflake.common.core.SqlState;

/**
 * Statement metadata which includes the result metadata and bind information.
 *
 * @author jhuang
 *     

Created on 1/21/16 */ public class SFStatementMetaData { // result metadata private SFResultSetMetaData resultSetMetaData; // number of binds private int numberOfBinds; private final SFStatementType statementType; private final boolean arrayBindSupported; private List metaDataOfBinds; private final boolean isValidMetaData; public SFStatementMetaData( SFResultSetMetaData resultSetMetaData, SFStatementType statementType, int numberOfBinds, boolean arrayBindSupported, List metaDataOfBinds, boolean isValidMetaData) { this.resultSetMetaData = resultSetMetaData; this.statementType = statementType; this.numberOfBinds = numberOfBinds; this.arrayBindSupported = arrayBindSupported; this.metaDataOfBinds = metaDataOfBinds; this.isValidMetaData = isValidMetaData; } public SFResultSetMetaData getResultSetMetaData() { return resultSetMetaData; } public void setResultSetMetaData(SFResultSetMetaData resultSetMetaData) { this.resultSetMetaData = resultSetMetaData; } public int getNumberOfBinds() { return numberOfBinds; } public MetaDataOfBinds getMetaDataForBindParam(int param) throws SQLException { if (param < 1 || param > numberOfBinds) { throw new SnowflakeSQLException( SqlState.NUMERIC_VALUE_OUT_OF_RANGE, ErrorCode.NUMERIC_VALUE_OUT_OF_RANGE.getMessageCode(), param, numberOfBinds); } if (numberOfBinds != metaDataOfBinds.size() || metaDataOfBinds.size() == 0) { throw new SnowflakeSQLException(SqlState.NO_DATA, ErrorCode.NO_VALID_DATA.getMessageCode()); } return metaDataOfBinds.get(param - 1); } public void setNumberOfBinds(int numberOfBinds) { this.numberOfBinds = numberOfBinds; } /** * Is a valid metadata or not. If true, this object is a valid metadata from describe. If false, a * dummy/empty metadata generated because prepare statement fails. * *

This is used to determine if the content is valid or not, e.g., number of bind parameters. * * @return true or false */ public boolean isValidMetaData() { return isValidMetaData; } /** * According to StatementType, to decide whether array binds supported or not * *

Currently, only INSERT supports array bind * * @return true if array binds is supported. */ public boolean isArrayBindSupported() { return this.arrayBindSupported; } public SFStatementType getStatementType() { return this.statementType; } /** * Generates an empty/invalid metadata for placeholder. * * @return statement metadata */ public static SFStatementMetaData emptyMetaData() { return new SFStatementMetaData( new SFResultSetMetaData( 0, Collections.emptyList(), Collections.emptyList(), Collections.emptyList(), null), SFStatementType.UNKNOWN, 0, false, new ArrayList<>(), false); // invalid metadata } }





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