Examples with DBDAttributeValue org.jkiss.dbeaver.model.data.DBDAttributeValue used on opensource projects

Example 1 with DBDAttributeValue

use of org.jkiss.dbeaver.model.data.DBDAttributeValue in project dbeaver by serge-rider.

the class JDBCTableConstraint method readKeyEnumeration.

private Collection<DBDLabelValuePair> readKeyEnumeration(DBCSession session, DBSEntityAttribute keyColumn, Object keyPattern, List<DBDAttributeValue> preceedingKeys, int maxResults) throws DBException {
    final TABLE table = getParentObject();
    assert table != null;
    DBDValueHandler keyValueHandler = DBUtils.findValueHandler(session, keyColumn);
    if (keyPattern != null) {
        if (keyPattern instanceof CharSequence) {
            if (((CharSequence) keyPattern).length() > 0) {
                keyPattern = "%" + keyPattern.toString() + "%";
            } else {
                keyPattern = null;
            }
        } else if (keyPattern instanceof Number) {
            // Subtract gap value to see some values before specified
            int gapSize = maxResults / 2;
            if (keyPattern instanceof Integer) {
                keyPattern = (Integer) keyPattern - gapSize;
            } else if (keyPattern instanceof Short) {
                keyPattern = (Short) keyPattern - gapSize;
            } else if (keyPattern instanceof Long) {
                keyPattern = (Long) keyPattern - gapSize;
            } else if (keyPattern instanceof Float) {
                keyPattern = (Float) keyPattern - gapSize;
            } else if (keyPattern instanceof Double) {
                keyPattern = (Double) keyPattern - gapSize;
            } else if (keyPattern instanceof BigInteger) {
                keyPattern = ((BigInteger) keyPattern).subtract(BigInteger.valueOf(gapSize));
            } else if (keyPattern instanceof BigDecimal) {
                keyPattern = ((BigDecimal) keyPattern).subtract(new BigDecimal(gapSize));
            }
        } else {
            // not supported
            keyPattern = null;
        }
    }
    StringBuilder query = new StringBuilder();
    query.append("SELECT ").append(DBUtils.getQuotedIdentifier(keyColumn));
    String descColumns = DBVUtils.getDictionaryDescriptionColumns(session.getProgressMonitor(), keyColumn);
    Collection<DBSEntityAttribute> descAttributes = null;
    if (descColumns != null) {
        descAttributes = DBVEntity.getDescriptionColumns(session.getProgressMonitor(), table, descColumns);
        query.append(", ").append(descColumns);
    }
    query.append(" FROM ").append(DBUtils.getObjectFullName(table, DBPEvaluationContext.DML));
    if (!CommonUtils.isEmpty(preceedingKeys) || keyPattern != null) {
        query.append(" WHERE ");
    }
    boolean hasCond = false;
    // Preceeding keys
    if (preceedingKeys != null && !preceedingKeys.isEmpty()) {
        for (int i = 0; i < preceedingKeys.size(); i++) {
            if (hasCond)
                query.append(" AND ");
            query.append(DBUtils.getQuotedIdentifier(getDataSource(), preceedingKeys.get(i).getAttribute().getName())).append(" = ?");
            hasCond = true;
        }
    }
    if (keyPattern != null) {
        if (hasCond)
            query.append(" AND (");
        query.append(DBUtils.getQuotedIdentifier(keyColumn));
        if (keyPattern instanceof CharSequence) {
            query.append(" LIKE ?");
        } else {
            query.append(" >= ?");
        }
        // Add desc columns conditions
        if (keyPattern instanceof CharSequence && descAttributes != null) {
            for (DBSEntityAttribute descAttr : descAttributes) {
                if (descAttr.getDataKind() == DBPDataKind.STRING) {
                    query.append(" OR ").append(DBUtils.getQuotedIdentifier(descAttr)).append(" LIKE ?");
                }
            }
        }
        if (hasCond)
            query.append(")");
        query.append(" ORDER BY ").append(DBUtils.getQuotedIdentifier(keyColumn));
    }
    try (DBCStatement dbStat = session.prepareStatement(DBCStatementType.QUERY, query.toString(), false, false, false)) {
        int paramPos = 0;
        if (preceedingKeys != null && !preceedingKeys.isEmpty()) {
            for (DBDAttributeValue precAttribute : preceedingKeys) {
                DBDValueHandler precValueHandler = DBUtils.findValueHandler(session, precAttribute.getAttribute());
                precValueHandler.bindValueObject(session, dbStat, precAttribute.getAttribute(), paramPos++, precAttribute.getValue());
            }
        }
        if (keyPattern != null) {
            keyValueHandler.bindValueObject(session, dbStat, keyColumn, paramPos++, keyPattern);
        }
        if (keyPattern instanceof CharSequence && descAttributes != null) {
            for (DBSEntityAttribute descAttr : descAttributes) {
                if (descAttr.getDataKind() == DBPDataKind.STRING) {
                    final DBDValueHandler valueHandler = DBUtils.findValueHandler(session, descAttr);
                    valueHandler.bindValueObject(session, dbStat, keyColumn, paramPos++, keyPattern);
                }
            }
        }
        dbStat.setLimit(0, maxResults);
        if (dbStat.executeStatement()) {
            try (DBCResultSet dbResult = dbStat.openResultSet()) {
                return DBVUtils.readDictionaryRows(session, keyColumn, keyValueHandler, dbResult);
            }
        } else {
            return Collections.emptyList();
        }
    }
}