Package org.teiid.adminshell

Source Code of org.teiid.adminshell.GroovySqlExtensions

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* regarding copyright ownership.  Some portions may be licensed
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*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General public static
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* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
* Lesser General public static License for more details.
*
* You should have received a copy of the GNU Lesser General public static
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*/

package org.teiid.adminshell;

import groovy.sql.TeiidSql;

import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.sql.SQLException;
import java.sql.SQLXML;
import java.sql.Types;
import java.util.Properties;

import org.teiid.jdbc.TeiidDriver;
import org.teiid.net.TeiidURL;
import org.teiid.script.io.ResultSetReader;

/**
* Extensions of Groovy Sql support, which somewhat bridges the gap to our old adminshell sql logic
*/
public class GroovySqlExtensions {
 
  private static Help help = new Help(GroovySqlExtensions.class);
 
  @Help.Doc(text = "Get a Teiid connection with a URL")
  public static TeiidSql connect(
      @Help.Doc(text = "url") String url) throws SQLException {
    return connect(url, null, null);
  }

  @Help.Doc(text = "Get a Teiid connection")
  public static TeiidSql connect(
      @Help.Doc(text = "url") String url,
      @Help.Doc(text = "user") String user,
      @Help.Doc(text = "password") String password) throws SQLException {
    Properties info = new Properties();
    if (user != null) {
      info.setProperty(TeiidURL.CONNECTION.USER_NAME, user);
    }
    if (password != null) {
      info.setProperty(TeiidURL.CONNECTION.PASSWORD, password);
    }
    Connection c = TeiidDriver.getInstance().connect(url, info);
    if (c == null) {
      throw new SQLException("Invalid url " + url);
    }
    return new TeiidSql(c);
  }
 
  @SuppressWarnings("nls")
  @Help.Doc(text = "Get a SQL connection using the defaults from connection.properties")
  public static TeiidSql connect() throws SQLException {
    AdminShell.loadConnectionProperties();
    return connect(AdminShell.p.getProperty("jdbc.url", "jdbc:teiid:VDB@mm://localhost:31000"),
        AdminShell.p.getProperty("jdbc.user", "admin"), AdminShell.p.getProperty("jdbc.password", "teiid"));
  }
 
  @Help.Doc(text = "Alternate row to String method that pretty prints SQL/XML",
    moreText = "e.g. sql.eachRow(\"select * from tables\", {row -> println rowToString(row) })")
  public static String rowToString(ResultSet results) throws SQLException {
    StringBuilder sb = new StringBuilder();
    //alternative toString - see GroovyResultSetExtension
    int columnCount = results.getMetaData().getColumnCount();
    for (int col = 1; col <= columnCount; col++) {
        int type = results.getMetaData().getColumnType(col);
        if (type == Types.BLOB) {
          Object anObj = results.getObject(col);
            sb.append(anObj != null ? "BLOB" : "null"); //$NON-NLS-1$ //$NON-NLS-2$
        }
        else if (type == Types.SQLXML) {
          SQLXML xml = results.getSQLXML(col);
          sb.append(xml != null ? ResultSetReader.prettyPrint(xml) : "null"); //$NON-NLS-1$
        }
        else {
          String str = results.getString(col);
            sb.append(str != null ? str : "null"); //$NON-NLS-1$
        }
        if (col != columnCount) {
            sb.append("    "); //$NON-NLS-1$
        }                   
    }
    return sb.toString();
  }
 
  @Help.Doc(text = "Pretty prints the ResultSetMetadata",
      moreText = {"e.g. sql.eachRow(\"select * from tables\", {rsmd -> println resultSetMetaDataToString(rsmd)},",
              "                {row -> println rowToString(row) })"})
  public static String resultSetMetaDataToString(ResultSetMetaData rsmd) throws SQLException {
    return ResultSetReader.resultSetMetaDataToString(rsmd, "    "); //$NON-NLS-1$
  }
 
  @Help.Doc(text = "Show help for all SQL Extension methods")
  public static void sqlHelp() {
    help.help();
  }
 
  @Help.Doc(text = "Show help for the given SQL Extension method")
  public static void sqlHelp(
      @Help.Doc(text = "method name") String method) {
    help.help(method);
  }

}
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