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FR [ 2818646 ] Implement Query.firstId/firstIdOnly 

https://sourceforge.net/tracker/?func=detail&aid=2818646&group_id=176962&atid=879335
This commit is contained in:
teo_sarca 2009-07-08 17:50:59 +00:00
parent 9094162b42
commit 7897bc9bdc
2 changed files with 94 additions and 0 deletions
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65
base/src/org/compiere/model/Query.java
View File

@ -52,6 +52,8 @@ import org.compiere.util.Util;
* <li>FR [ 2726447 ] Query aggregate methods for all return types
* <li>FR [ 2818547 ] Implement Query.setOnlySelection
* https://sourceforge.net/tracker/?func=detail&aid=2818547&group_id=176962&atid=879335
* <li>FR [ 2818646 ] Implement Query.firstId/firstIdOnly
* https://sourceforge.net/tracker/?func=detail&aid=2818646&group_id=176962&atid=879335
* @author Redhuan D. Oon
* <li>FR: [ 2214883 ] Remove SQL code and Replace for Query // introducing SQL String prompt in log.info
* <li>FR: [ 2214883 ] - to introduce .setClient_ID
@ -306,6 +308,69 @@ public class Query
}
return po;
}
/**
* Return first ID
* @return first ID
* @throws DBException
*/
public int firstId() throws DBException
{
return firstId(false);
}
/**
* Return first ID.
* If there are more results and exception is thrown.
* @return first ID
* @throws DBException
*/
public int firstIdOnly() throws DBException
{
return firstId(true);
}
private int firstId(boolean assumeOnlyOneResult) throws DBException
{
String[] keys = table.getKeyColumns();
if (keys.length != 1)
{
throw new DBException("Table "+table+" has 0 or more than 1 key columns");
}
StringBuffer selectClause = new StringBuffer("SELECT ");
selectClause.append(keys[0]);
selectClause.append(" FROM ").append(table.getTableName());
String sql = buildSQL(selectClause, true);
int id = -1;
PreparedStatement pstmt = null;
ResultSet rs = null;
try
{
pstmt = DB.prepareStatement(sql, trxName);
rs = createResultSet(pstmt);
if (rs.next())
{
id = rs.getInt(1);
}
if (assumeOnlyOneResult && rs.next())
{
throw new DBException("QueryMoreThanOneRecordsFound"); // TODO : translate
}
}
catch (SQLException e)
{
throw new DBException(e, sql);
}
finally
{
DB.close(rs, pstmt);
rs = null; pstmt = null;
}
//
return id;
}
/**

29
extend/src/test/functional/QueryTest.java
View File

@ -153,6 +153,16 @@ public class QueryTest extends AdempiereTestCase
.first();
assertEquals("Invalid object", "C_Invoice", t.getTableName());
}
public void testFirstId() throws Exception
{
int id = new Query(getCtx(), "AD_Table", "TableName IN (?,?)", getTrxName())
.setParameters(new Object[]{"C_Invoice", "M_InOut"})
.setOrderBy("TableName")
.firstId();
int expectedId = 318; // C_Invoice
assertEquals("Invalid ID", expectedId, id);
}
public void testFirstOnly() throws Exception
{
@ -172,6 +182,25 @@ public class QueryTest extends AdempiereTestCase
});
}
public void testFirstIdOnly() throws Exception
{
int expectedId = 318; // C_Invoice
int id = new Query(getCtx(), "AD_Table", "AD_Table_ID=?", getTrxName())
.setParameters(new Object[]{expectedId})
.firstIdOnly();
assertEquals("Invalid table ID", expectedId, id);
//
assertExceptionThrown(null, DBException.class, new Runnable(){
public void run()
{
new Query(getCtx(), "AD_Table", "TableName IN (?,?)", getTrxName())
.setParameters(new Object[]{"C_Invoice", "M_InOut"})
.setOrderBy("TableName")
.firstIdOnly();
}
});
}
public void testSetClient_ID() throws Exception
{
int AD_Client_ID = Env.getAD_Client_ID(getCtx());