Examples with QueryOptionPage siena.core.options.QueryOptionPage used on opensource projects

Example 16 with QueryOptionPage

use of siena.core.options.QueryOptionPage in project siena by mandubian.

the class SdbPersistenceManager method postMapping.

protected <T> void postMapping(Query<T> query) {
    QueryOptionPage pag = (QueryOptionPage) query.option(QueryOptionPage.ID);
    QueryOptionSdbContext sdbCtx = (QueryOptionSdbContext) query.option(QueryOptionSdbContext.ID);
    QueryOptionState state = (QueryOptionState) query.option(QueryOptionState.ID);
    QueryOptionOffset off = (QueryOptionOffset) query.option(QueryOptionOffset.ID);
    // desactivates paging & offset in stateless mode
    if (state.isStateless() && !pag.isPaginating()) {
        pag.passivate();
        pag.pageSize = 0;
        sdbCtx.resetAll();
    }
    // offset if not kept as it is never reused as is even in stateful
    // mode. the stateful mode only keeps the realOffset/pagination alive
    off.passivate();
    off.offset = 0;
}

Example 17 with QueryOptionPage

use of siena.core.options.QueryOptionPage in project siena by mandubian.

the class SdbPersistenceManager method postFetch.

protected <T> void postFetch(Query<T> query, SelectResult res) {
    QueryOptionPage pag = (QueryOptionPage) query.option(QueryOptionPage.ID);
    QueryOptionSdbContext sdbCtx = (QueryOptionSdbContext) query.option(QueryOptionSdbContext.ID);
    QueryOptionState state = (QueryOptionState) query.option(QueryOptionState.ID);
    QueryOptionOffset off = (QueryOptionOffset) query.option(QueryOptionOffset.ID);
    if (sdbCtx.realPageSize == 0) {
        sdbCtx.realPageSize = res.getItems().size();
    }
    String token = null;
    // sets the current cursor (in stateful mode, cursor is always kept for further use)
    if (pag.isPaginating()) {
        token = res.getNextToken();
        if (token != null) {
            sdbCtx.addToken(token, sdbCtx.realOffset + sdbCtx.realPageSize + off.offset);
        }
        // if paginating and 0 results then no more data else resets noMoreDataAfter
        if (res.getItems().size() == 0) {
            sdbCtx.noMoreDataAfter = true;
        } else {
            sdbCtx.noMoreDataAfter = false;
        }
    } else {
        if (state.isStateless()) {
            // in stateless, doesn't follow real offset & stays where it is
            sdbCtx.realOffset = off.offset;
            token = res.getNextToken();
            if (token != null) {
                sdbCtx.addToken(token, /*sdbCtx.realOffset +*/
                sdbCtx.realPageSize);
            }
        } else {
            // follows the real offset in stateful mode
            sdbCtx.realOffset += sdbCtx.realPageSize;
            token = res.getNextToken();
            if (token != null) {
                sdbCtx.addAndMoveToken(token, sdbCtx.realOffset);
            } else {
                // forces to go to next token to invalidate current one
                // if there are no token after, currentToken will be null
                sdbCtx.nextToken();
            }
        }
    }
}

Example 18 with QueryOptionPage

use of siena.core.options.QueryOptionPage in project siena by mandubian.

the class GaeQueryUtils method previousPage.

public static <T> void previousPage(QueryData<T> query) {
    QueryOptionPage pag = (QueryOptionPage) query.option(QueryOptionPage.ID);
    QueryOptionState state = (QueryOptionState) query.option(QueryOptionState.ID);
    QueryOptionGaeContext gaeCtx = (QueryOptionGaeContext) query.option(QueryOptionGaeContext.ID);
    if (gaeCtx == null) {
        gaeCtx = new QueryOptionGaeContext();
        query.options().put(gaeCtx.type, gaeCtx);
    }
    // if no more data before, doesn't try to go before
    if (gaeCtx.noMoreDataBefore) {
        return;
    }
    // if no more data after, removes flag to be able to go before
    if (gaeCtx.noMoreDataAfter) {
        gaeCtx.noMoreDataAfter = false;
    }
    if (pag.isPaginating()) {
        gaeCtx.realPageSize = pag.pageSize;
        if (state.isStateless()) {
            //if(offset.isActive()){
            if (gaeCtx.realOffset >= pag.pageSize) {
                gaeCtx.realOffset -= pag.pageSize;
            } else {
                gaeCtx.realOffset = 0;
                gaeCtx.noMoreDataBefore = true;
            }
        //}
        } else {
            if (!gaeCtx.isActive()) {
                if (!gaeCtx.useCursor) {
                    //if(offset.isActive()){
                    if (gaeCtx.realOffset >= pag.pageSize) {
                        gaeCtx.realOffset -= pag.pageSize;
                    } else {
                        gaeCtx.realOffset = 0;
                        gaeCtx.noMoreDataBefore = true;
                    }
                //}
                } else // if the cursor is active, verifies this is not the first page 
                // with the offset (active or passive) and sets noMoreData in this case
                {
                    //QueryOptionOffset offset = (QueryOptionOffset)query.option(QueryOptionOffset.ID);
                    if (gaeCtx.realOffset == 0) {
                        gaeCtx.noMoreDataBefore = true;
                    }
                }
            } else {
                QueryOptionOffset offset = (QueryOptionOffset) query.option(QueryOptionOffset.ID);
                if (!gaeCtx.useCursor) {
                    //if(offset.isActive()){
                    if (gaeCtx.realOffset >= pag.pageSize) {
                        gaeCtx.realOffset -= pag.pageSize;
                    } else // passivates offset and computes the page before because we are at the first page
                    {
                        offset.passivate();
                        gaeCtx.noMoreDataBefore = true;
                        previousPage(query);
                    }
                //}
                } else {
                    String cursor = gaeCtx.previousCursor();
                    // and recall the previousPage with the offset mechanism 
                    if (cursor == null) {
                        offset.activate();
                        gaeCtx.useCursor = false;
                        previousPage(query);
                    } else {
                        offset.passivate();
                        gaeCtx.useCursor = true;
                        if (gaeCtx.realOffset >= pag.pageSize) {
                            gaeCtx.realOffset -= pag.pageSize;
                        } else // passivates offset and computes the page before because we are at the first page
                        {
                            gaeCtx.noMoreDataBefore = true;
                            previousPage(query);
                        }
                    //previousPage(query);
                    }
                }
            }
        }
    } else {
        // throws exception because it's impossible to reuse nextPage when paginating has been interrupted, the cases are too many
        throw new SienaException("Can't use nextPage after pagination has been interrupted...");
    }
}

Example 19 with QueryOptionPage

use of siena.core.options.QueryOptionPage in project siena by mandubian.

the class JdbcPersistenceManager method doFetch.

private <T> List<T> doFetch(Query<T> query, int limit, int offset) {
    QueryOptionJdbcContext jdbcCtx = (QueryOptionJdbcContext) query.option(QueryOptionJdbcContext.ID);
    if (jdbcCtx == null) {
        jdbcCtx = new QueryOptionJdbcContext();
        query.customize(jdbcCtx);
    }
    // activates page and offset options as there are always used in SQL requests
    QueryOptionPage pag = (QueryOptionPage) query.option(QueryOptionPage.ID);
    if (!pag.isPaginating()) {
        if (pag.isActive()) {
            if (limit != Integer.MAX_VALUE) {
                jdbcCtx.realPageSize = limit;
            } else {
                jdbcCtx.realPageSize = pag.pageSize;
            }
        } else {
            jdbcCtx.realPageSize = limit;
        }
    } else {
        jdbcCtx.realPageSize = pag.pageSize;
    }
    QueryOptionOffset offsetOpt = (QueryOptionOffset) (query.option(QueryOptionOffset.ID));
    // if local offset has been set, uses it
    if (offset != 0) {
        offsetOpt.activate();
        offsetOpt.offset = offset;
    }
    QueryOptionState state = (QueryOptionState) query.option(QueryOptionState.ID);
    // if previousPage has detected there is no more data, simply returns an empty list
    if (jdbcCtx.noMoreDataBefore) {
        return new ArrayList<T>();
    }
    if (state.isStateless() || (state.isStateful() && !jdbcCtx.isActive()) || (state.isStateful() && jdbcCtx.isActive() && jdbcCtx.isClosed())) {
        if (state.isStateless()) {
            if (pag.isPaginating()) {
                if (offsetOpt.isActive()) {
                    jdbcCtx.realOffset += offsetOpt.offset;
                    offsetOpt.passivate();
                } else {
                // keeps realOffset
                }
            } else {
                // if page is active, immediately passivates it not to keep is active
                if (pag.isActive()) {
                    pag.passivate();
                }
                if (offsetOpt.isActive()) {
                    jdbcCtx.realOffset = offsetOpt.offset;
                    offsetOpt.passivate();
                } else {
                    jdbcCtx.realOffset = 0;
                }
            }
        } else {
            if (offsetOpt.isActive()) {
                jdbcCtx.realOffset += offsetOpt.offset;
                offsetOpt.passivate();
            } else {
            // keeps realOffset
            }
        }
        Class<T> clazz = query.getQueriedClass();
        List<Object> parameters = new ArrayList<Object>();
        StringBuilder sql = JdbcDBUtils.buildSqlSelect(query);
        appendSqlWhere(query, sql, parameters);
        JdbcDBUtils.appendSqlOrder(query, sql);
        JdbcDBUtils.appendSqlLimitOffset(query, sql, parameters);
        //sql.append(suffix);
        PreparedStatement statement = null;
        ResultSet rs = null;
        try {
            statement = createStatement(sql.toString(), parameters);
            if (pag.isPaginating()) {
                // this is just a hint to the DB so wonder if it should be used
                statement.setFetchSize(jdbcCtx.realPageSize);
            }
            rs = statement.executeQuery();
            List<T> result = JdbcMappingUtils.mapList(clazz, rs, ClassInfo.getClassInfo(clazz).tableName, JdbcMappingUtils.getJoinFields(query), jdbcCtx.realPageSize);
            if (pag.isPaginating()) {
                if (result.size() == 0) {
                    jdbcCtx.noMoreDataAfter = true;
                } else {
                    jdbcCtx.noMoreDataAfter = false;
                }
            } else {
                if (state.isStateful()) {
                    jdbcCtx.realOffset += result.size();
                }
            }
            if (state.isStateless()) {
                JdbcDBUtils.closeResultSet(rs);
                JdbcDBUtils.closeStatementAndConnection(this, statement);
            } else {
                Integer offsetParamIdx = parameters.size();
                Integer limitParamIdx = offsetParamIdx - 1;
                // store indexes of offset and limit for reuse
                jdbcCtx.activate();
                jdbcCtx.statement = statement;
                jdbcCtx.limitParamIdx = limitParamIdx;
                jdbcCtx.offsetParamIdx = offsetParamIdx;
            }
            return result;
        } catch (SQLException e) {
            JdbcDBUtils.closeResultSet(rs);
            JdbcDBUtils.closeStatementAndConnection(this, statement);
            throw new SienaException(e);
        }
    } else {
        // payload has been initialized so goes on
        Class<T> clazz = query.getQueriedClass();
        if (offsetOpt.isActive()) {
            jdbcCtx.realOffset += offsetOpt.offset;
            offsetOpt.passivate();
        } else {
        // keeps realOffset
        }
        ResultSet rs = null;
        try {
            // when paginating, should update limit and offset
            //if(pag.isActive()){
            // update limit and offset
            jdbcCtx.statement.setObject(jdbcCtx.limitParamIdx, jdbcCtx.realPageSize);
            //}
            //if(offsetOpt.isActive()){
            jdbcCtx.statement.setObject(jdbcCtx.offsetParamIdx, jdbcCtx.realOffset);
            //}
            rs = jdbcCtx.statement.executeQuery();
            List<T> result = JdbcMappingUtils.mapList(clazz, rs, ClassInfo.getClassInfo(clazz).tableName, JdbcMappingUtils.getJoinFields(query), jdbcCtx.realPageSize);
            if (pag.isPaginating()) {
                if (result.size() == 0) {
                    jdbcCtx.noMoreDataAfter = true;
                } else {
                    jdbcCtx.noMoreDataAfter = false;
                }
            } else {
                jdbcCtx.realOffset += result.size();
            }
            return result;
        } catch (SQLException ex) {
            JdbcDBUtils.closeResultSet(rs);
            JdbcDBUtils.closeStatementAndConnection(this, jdbcCtx.statement);
            throw new SienaException(ex);
        }
    }
}

Example 20 with QueryOptionPage

use of siena.core.options.QueryOptionPage in project siena by mandubian.

the class JdbcPersistenceManager method doIter.

private <T> Iterable<T> doIter(Query<T> query, int limit, int offset) {
    QueryOptionJdbcContext jdbcCtx = (QueryOptionJdbcContext) query.option(QueryOptionJdbcContext.ID);
    if (jdbcCtx == null) {
        jdbcCtx = new QueryOptionJdbcContext();
        query.customize(jdbcCtx);
    }
    // activates page and offset options as there are always used in SQL requests
    QueryOptionPage pag = (QueryOptionPage) query.option(QueryOptionPage.ID);
    //		else {
    if (!pag.isPaginating()) {
        if (pag.isActive()) {
            if (limit != Integer.MAX_VALUE) {
                jdbcCtx.realPageSize = limit;
            } else {
                jdbcCtx.realPageSize = pag.pageSize;
            }
        } else {
            jdbcCtx.realPageSize = limit;
        }
    } else {
        jdbcCtx.realPageSize = pag.pageSize;
    }
    //		}
    QueryOptionOffset offsetOpt = (QueryOptionOffset) (query.option(QueryOptionOffset.ID));
    // if local offset has been set, uses it
    if (offset != 0) {
        offsetOpt.activate();
        offsetOpt.offset = offset;
    }
    QueryOptionState state = (QueryOptionState) query.option(QueryOptionState.ID);
    // if previousPage has detected there is no more data, simply returns an empty list
    if (jdbcCtx.noMoreDataBefore) {
        return new ArrayList<T>();
    }
    if (state.isStateless() || (state.isStateful() && !jdbcCtx.isActive())) {
        if (state.isStateless()) {
            if (pag.isPaginating()) {
                if (offsetOpt.isActive()) {
                    jdbcCtx.realOffset += offsetOpt.offset;
                    offsetOpt.passivate();
                } else {
                // keeps realOffset
                }
            } else {
                // if page is active, immediately passivates it not to keep is active
                if (pag.isActive()) {
                    pag.passivate();
                }
                if (offsetOpt.isActive()) {
                    jdbcCtx.realOffset = offsetOpt.offset;
                    offsetOpt.passivate();
                } else {
                    jdbcCtx.realOffset = 0;
                }
            }
        } else {
            if (offsetOpt.isActive()) {
                jdbcCtx.realOffset += offsetOpt.offset;
                offsetOpt.passivate();
            } else {
            // keeps realOffset
            }
        }
        List<Object> parameters = new ArrayList<Object>();
        StringBuilder sql = JdbcDBUtils.buildSqlSelect(query);
        appendSqlWhere(query, sql, parameters);
        JdbcDBUtils.appendSqlOrder(query, sql);
        JdbcDBUtils.appendSqlLimitOffset(query, sql, parameters);
        //sql.append(suffix);
        PreparedStatement statement = null;
        ResultSet rs = null;
        try {
            statement = createStatement(sql.toString(), parameters);
            if (pag.isActive()) {
                // this is just a hint to the DB so wonder if it should be used
                statement.setFetchSize(jdbcCtx.realPageSize);
            }
            rs = statement.executeQuery();
            if (state.isStateless()) {
            //in iteration, doesn't close the resultset to reuse it
            //JdbcDBUtils.closeResultSet(rs);
            //JdbcDBUtils.closeStatement(statement);
            } else {
                Integer offsetParamIdx = parameters.size();
                Integer limitParamIdx = offsetParamIdx - 1;
                // store indexes of offset and limit for reuse
                jdbcCtx.activate();
                jdbcCtx.statement = statement;
                jdbcCtx.limitParamIdx = limitParamIdx;
                jdbcCtx.offsetParamIdx = offsetParamIdx;
            }
            return new JdbcSienaIterable<T>(this, statement, rs, query);
        } catch (SQLException e) {
            JdbcDBUtils.closeResultSet(rs);
            JdbcDBUtils.closeStatementAndConnection(this, statement);
            throw new SienaException(e);
        }
    } else {
        if (offsetOpt.isActive()) {
            jdbcCtx.realOffset += offsetOpt.offset;
            offsetOpt.passivate();
        } else {
        // keeps realOffset
        }
        // payload has been initialized so goes on
        try {
            // when paginating, should update limit and offset
            //if(pag.isActive()){
            // update limit and offset
            jdbcCtx.statement.setObject(jdbcCtx.limitParamIdx, jdbcCtx.realPageSize);
            //}
            //if(offsetOpt.isActive()){
            jdbcCtx.statement.setObject(jdbcCtx.offsetParamIdx, jdbcCtx.realOffset);
            //}
            ResultSet rs = jdbcCtx.statement.executeQuery();
            return new JdbcSienaIterable<T>(this, jdbcCtx.statement, rs, query);
        } catch (SQLException ex) {
            JdbcDBUtils.closeStatementAndConnection(this, jdbcCtx.statement);
            throw new SienaException(ex);
        }
    }
}