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Handle new invoke() signature, wrap remaining db ops in invoke().

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git-svn-id: https://samskivert.googlecode.com/svn/trunk@138 6335cc39-0255-0410-8fd6-9bcaacd3b74c
This commit is contained in:
mdb
2001-06-02 02:22:55 +00:00
parent 627a309482
commit 0f9f4f2e5c
1 changed files with 101 additions and 46 deletions
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projects/robodj/src/java/robodj/repository/Repository.java
+88 -33
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@@ -1,5 +1,5 @@
//
// $Id: Repository.java,v 1.3 2001/03/18 06:58:55 mdb Exp $
// $Id: Repository.java,v 1.4 2001/06/02 02:22:55 mdb Exp $
package robodj.repository;
@@ -63,6 +63,9 @@ public class Repository extends MySQLRepository
public Entry getEntry (int entryid)
throws SQLException
{
// make sure the connection is open
ensureConnection();
// look up the entry
Cursor ec = _etable.select("where entryid = " + entryid);
@@ -83,6 +86,58 @@ public class Repository extends MySQLRepository
return entry;
}
/**
* @param query a WHERE clause describing which entries should be
* selected (ie. 'where title like "%foo%"').
*
* @return all entries in the table matching the query
* parameters. <em>Note</em>: this member function does not populate
* the songs arrays of the returned entries. Call
* <code>populateSongs</code> on an entry by entry basis for that.
*/
public Entry[] getEntries (final String query)
throws SQLException
{
return (Entry[])execute(new Operation () {
public Object invoke () throws SQLException
{
// look up the entry
Cursor ec = _etable.select(query);
// fetch the entries from the cursor
List elist = ec.toArrayList();
Entry[] entries = new Entry[elist.size()];
elist.toArray(entries);
return entries;
}
});
}
/**
* Loads the songs for this entry from the database and inserts them
* into its songs array. If the songs are already loaded, this
* function does nothing.
*/
public void populateSongs (final Entry entry)
throws SQLException
{
if (entry.songs == null) {
execute(new Operation () {
public Object invoke () throws SQLException
{
// load up the songs for this entry
String query = "where entryid = " + entry.entryid;
Cursor sc = _stable.select(query);
List slist = sc.toArrayList();
entry.songs = new Song[slist.size()];
slist.toArray(entry.songs);
return null;
}
});
}
}
/**
* Inserts a new entry into the table. All fields except the entryid
* should contain valid values. The entryid field should be zero. The
@@ -95,7 +150,7 @@ public class Repository extends MySQLRepository
throws SQLException
{
execute(new Operation () {
public void invoke () throws SQLException
public Object invoke () throws SQLException
{
// insert the entry into the entry table
_etable.insert(entry);
@@ -113,6 +168,8 @@ public class Repository extends MySQLRepository
entry.songs[i].songid = lastInsertedId();
}
}
return null;
}
});
}
@@ -131,7 +188,7 @@ public class Repository extends MySQLRepository
throws SQLException
{
execute(new Operation () {
public void invoke () throws SQLException
public Object invoke () throws SQLException
{
// update the entry
_etable.update(entry);
@@ -142,6 +199,8 @@ public class Repository extends MySQLRepository
_stable.update(entry.songs[i]);
}
}
return null;
}
});
}
@@ -153,12 +212,13 @@ public class Repository extends MySQLRepository
throws SQLException
{
execute(new Operation () {
public void invoke () throws SQLException
public Object invoke () throws SQLException
{
// remove the entry from the entry table and the foreign
// key constraints will automatically remove all of the
// corresponding songs
_etable.delete(entry);
return null;
}
});
}
@@ -179,7 +239,7 @@ public class Repository extends MySQLRepository
throws SQLException
{
execute(new Operation () {
public void invoke () throws SQLException
public Object invoke () throws SQLException
{
// fill in the appropriate entry id value
song.entryid = entry.entryid;
@@ -188,6 +248,8 @@ public class Repository extends MySQLRepository
_stable.insert(song);
// communicate the songid back to the caller
song.songid = lastInsertedId();
return null;
}
});
}
@@ -200,9 +262,10 @@ public class Repository extends MySQLRepository
throws SQLException
{
execute(new Operation () {
public void invoke () throws SQLException
public Object invoke () throws SQLException
{
_stable.update(song);
return null;
}
});
}
@@ -215,11 +278,12 @@ public class Repository extends MySQLRepository
throws SQLException
{
execute(new Operation () {
public void invoke () throws SQLException
public Object invoke () throws SQLException
{
Category cat = new Category();
cat.name = name;
_ctable.insert(cat);
return null;
}
});
@@ -232,6 +296,9 @@ public class Repository extends MySQLRepository
*/
public Category[] getCategories ()
throws SQLException
{
return (Category[])execute(new Operation () {
public Object invoke () throws SQLException
{
Cursor ccur = _ctable.select("");
List clist = ccur.toArrayList();
@@ -239,54 +306,42 @@ public class Repository extends MySQLRepository
clist.toArray(cats);
return cats;
}
});
}
/**
* Associates the specified entry with the specified category. An
* entry can be mapped into multiple categories.
*/
public void associateEntry (Entry entry, int categoryid)
public void associateEntry (final Entry entry, final int categoryid)
throws SQLException
{
try {
execute(new Operation () {
public Object invoke () throws SQLException
{
CategoryMapping map =
new CategoryMapping(categoryid, entry.entryid);
_cmtable.insert(map);
_session.commit();
} catch (SQLException sqe) {
// back out our changes if something got hosed
_session.rollback();
throw sqe;
} catch (RuntimeException rte) {
// back out our changes if something got hosed
_session.rollback();
throw rte;
return null;
}
});
}
/**
* Disassociates the specified entry from the specified category.
*/
public void disassociateEntry (Entry entry, int categoryid)
public void disassociateEntry (final Entry entry, final int categoryid)
throws SQLException
{
try {
execute(new Operation () {
public Object invoke () throws SQLException
{
CategoryMapping map =
new CategoryMapping(categoryid, entry.entryid);
_cmtable.delete(map);
_session.commit();
} catch (SQLException sqe) {
// back out our changes if something got hosed
_session.rollback();
throw sqe;
} catch (RuntimeException rte) {
// back out our changes if something got hosed
_session.rollback();
throw rte;
return null;
}
});
}
protected Table _etable;