Example usage for java.sql NClob getCharacterStream

Introduction

In this page you can find the example usage for java.sql NClob getCharacterStream.

Prototype

java.io.Reader getCharacterStream() throws SQLException;

Source Link

Document

Retrieves the CLOB value designated by this Clob object as a java.io.Reader object (or as a stream of characters).

Usage

From source file:it.greenvulcano.gvesb.datahandling.dbo.utils.StandardRowSetBuilder.java

public int build(Document doc, String id, ResultSet rs, Set<Integer> keyField,
        Map<String, FieldFormatter> fieldNameToFormatter, Map<String, FieldFormatter> fieldIdToFormatter)
        throws Exception {
    if (rs == null) {
        return 0;
    }/*from ww w .ja  v a 2  s.c  o m*/
    int rowCounter = 0;
    Element docRoot = doc.getDocumentElement();
    ResultSetMetaData metadata = rs.getMetaData();
    FieldFormatter[] fFormatters = buildFormatterArray(metadata, fieldNameToFormatter, fieldIdToFormatter);

    boolean noKey = ((keyField == null) || keyField.isEmpty());

    //boolean isNull = false;
    Element data = null;
    Element row = null;
    Element col = null;
    Text text = null;
    String textVal = null;
    String precKey = null;
    String colKey = null;
    Map<String, String> keyAttr = new HashMap<String, String>();
    while (rs.next()) {
        if (rowCounter % 10 == 0) {
            ThreadUtils.checkInterrupted(getClass().getSimpleName(), name, logger);
        }
        row = parser.createElement(doc, AbstractDBO.ROW_NAME);

        parser.setAttribute(row, AbstractDBO.ID_NAME, id);
        for (int j = 1; j <= metadata.getColumnCount(); j++) {
            FieldFormatter fF = fFormatters[j];

            //isNull = false;
            col = parser.createElement(doc, AbstractDBO.COL_NAME);
            switch (metadata.getColumnType(j)) {
            case Types.DATE: {
                parser.setAttribute(col, AbstractDBO.TYPE_NAME, AbstractDBO.DATE_TYPE);
                java.sql.Date dateVal = rs.getDate(j);
                textVal = processDateTime(col, fF, dateVal, AbstractDBO.DEFAULT_DATE_FORMAT);
            }
                break;
            case Types.TIME: {
                parser.setAttribute(col, AbstractDBO.TYPE_NAME, AbstractDBO.TIME_TYPE);
                java.sql.Time dateVal = rs.getTime(j);
                textVal = processDateTime(col, fF, dateVal, AbstractDBO.DEFAULT_TIME_FORMAT);
            }
                break;
            case Types.TIMESTAMP: {
                parser.setAttribute(col, AbstractDBO.TYPE_NAME, AbstractDBO.TIMESTAMP_TYPE);
                Timestamp dateVal = rs.getTimestamp(j);
                textVal = processDateTime(col, fF, dateVal, AbstractDBO.DEFAULT_DATE_FORMAT);
            }
                break;
            case Types.DOUBLE: {
                parser.setAttribute(col, AbstractDBO.TYPE_NAME, AbstractDBO.FLOAT_TYPE);
                double numVal = rs.getDouble(j);
                textVal = processDouble(col, fF, numVal);
            }
                break;
            case Types.FLOAT:
            case Types.REAL: {
                parser.setAttribute(col, AbstractDBO.TYPE_NAME, AbstractDBO.FLOAT_TYPE);
                float numVal = rs.getFloat(j);
                textVal = processDouble(col, fF, numVal);
            }
                break;
            case Types.BIGINT: {
                parser.setAttribute(col, AbstractDBO.TYPE_NAME, AbstractDBO.BIGINT_TYPE);
                long numVal = rs.getLong(j);
                parser.setAttribute(col, AbstractDBO.NULL_NAME, "false");
                textVal = String.valueOf(numVal);
            }
                break;
            case Types.INTEGER: {
                parser.setAttribute(col, AbstractDBO.TYPE_NAME, AbstractDBO.INTEGER_TYPE);
                int numVal = rs.getInt(j);
                parser.setAttribute(col, AbstractDBO.NULL_NAME, "false");
                textVal = String.valueOf(numVal);
            }
                break;
            case Types.SMALLINT:
            case Types.TINYINT: {
                parser.setAttribute(col, AbstractDBO.TYPE_NAME, AbstractDBO.SMALLINT_TYPE);
                short numVal = rs.getShort(j);
                parser.setAttribute(col, AbstractDBO.NULL_NAME, "false");
                textVal = String.valueOf(numVal);
            }
                break;
            case Types.NUMERIC:
            case Types.DECIMAL: {
                BigDecimal bigdecimal = rs.getBigDecimal(j);
                boolean isNull = bigdecimal == null;
                parser.setAttribute(col, AbstractDBO.NULL_NAME, String.valueOf(isNull));
                if (isNull) {
                    if (metadata.getScale(j) > 0) {
                        parser.setAttribute(col, AbstractDBO.TYPE_NAME, AbstractDBO.DECIMAL_TYPE);
                    } else {
                        parser.setAttribute(col, AbstractDBO.TYPE_NAME, AbstractDBO.NUMERIC_TYPE);
                    }
                    textVal = "";
                } else {
                    if (fF != null) {
                        parser.setAttribute(col, AbstractDBO.TYPE_NAME, AbstractDBO.DECIMAL_TYPE);
                        parser.setAttribute(col, AbstractDBO.FORMAT_NAME, fF.getNumberFormat());
                        parser.setAttribute(col, AbstractDBO.GRP_SEPARATOR_NAME, fF.getGroupSeparator());
                        parser.setAttribute(col, AbstractDBO.DEC_SEPARATOR_NAME, fF.getDecSeparator());
                        textVal = fF.formatNumber(bigdecimal);
                    } else if (metadata.getScale(j) > 0) {
                        parser.setAttribute(col, AbstractDBO.TYPE_NAME, AbstractDBO.DECIMAL_TYPE);
                        parser.setAttribute(col, AbstractDBO.FORMAT_NAME, numberFormat);
                        parser.setAttribute(col, AbstractDBO.GRP_SEPARATOR_NAME, groupSeparator);
                        parser.setAttribute(col, AbstractDBO.DEC_SEPARATOR_NAME, decSeparator);
                        textVal = numberFormatter.format(bigdecimal);
                    } else {
                        parser.setAttribute(col, AbstractDBO.TYPE_NAME, AbstractDBO.NUMERIC_TYPE);
                        textVal = bigdecimal.toString();
                    }
                }
            }
                break;
            case Types.BOOLEAN: {
                parser.setAttribute(col, AbstractDBO.TYPE_NAME, AbstractDBO.BOOLEAN_TYPE);
                boolean bVal = rs.getBoolean(j);
                parser.setAttribute(col, AbstractDBO.NULL_NAME, "false");
                textVal = String.valueOf(bVal);
            }
                break;
            case Types.SQLXML: {
                parser.setAttribute(col, AbstractDBO.TYPE_NAME, AbstractDBO.XML_TYPE);
                SQLXML xml = rs.getSQLXML(j);
                boolean isNull = xml == null;
                parser.setAttribute(col, AbstractDBO.NULL_NAME, String.valueOf(isNull));
                if (isNull) {
                    textVal = "";
                } else {
                    textVal = xml.getString();
                }
            }
                break;
            case Types.NCHAR:
            case Types.NVARCHAR: {
                parser.setAttribute(col, AbstractDBO.TYPE_NAME, AbstractDBO.NSTRING_TYPE);
                textVal = rs.getNString(j);
                if (textVal == null) {
                    textVal = "";
                }
            }
                break;
            case Types.CHAR:
            case Types.VARCHAR: {
                parser.setAttribute(col, AbstractDBO.TYPE_NAME, AbstractDBO.STRING_TYPE);
                textVal = rs.getString(j);
                boolean isNull = textVal == null;
                parser.setAttribute(col, AbstractDBO.NULL_NAME, String.valueOf(isNull));
                if (isNull) {
                    textVal = "";
                }
            }
                break;
            case Types.NCLOB: {
                parser.setAttribute(col, AbstractDBO.TYPE_NAME, AbstractDBO.LONG_NSTRING_TYPE);
                NClob clob = rs.getNClob(j);
                if (clob != null) {
                    Reader is = clob.getCharacterStream();
                    StringWriter str = new StringWriter();

                    IOUtils.copy(is, str);
                    is.close();
                    textVal = str.toString();
                } else {
                    textVal = "";
                }
            }
                break;
            case Types.CLOB: {
                parser.setAttribute(col, AbstractDBO.TYPE_NAME, AbstractDBO.LONG_STRING_TYPE);
                Clob clob = rs.getClob(j);
                if (clob != null) {
                    Reader is = clob.getCharacterStream();
                    StringWriter str = new StringWriter();

                    IOUtils.copy(is, str);
                    is.close();
                    textVal = str.toString();
                } else {
                    textVal = "";
                }
            }
                break;
            case Types.BLOB: {
                parser.setAttribute(col, AbstractDBO.TYPE_NAME, AbstractDBO.BASE64_TYPE);
                Blob blob = rs.getBlob(j);
                boolean isNull = blob == null;
                parser.setAttribute(col, AbstractDBO.NULL_NAME, String.valueOf(isNull));
                if (isNull) {
                    textVal = "";
                } else {
                    InputStream is = blob.getBinaryStream();
                    ByteArrayOutputStream baos = new ByteArrayOutputStream();
                    IOUtils.copy(is, baos);
                    is.close();
                    try {
                        byte[] buffer = Arrays.copyOf(baos.toByteArray(), (int) blob.length());
                        textVal = Base64.getEncoder().encodeToString(buffer);
                    } catch (SQLFeatureNotSupportedException exc) {
                        textVal = Base64.getEncoder().encodeToString(baos.toByteArray());
                    }
                }
            }
                break;
            default: {
                parser.setAttribute(col, AbstractDBO.TYPE_NAME, AbstractDBO.DEFAULT_TYPE);
                textVal = rs.getString(j);
                boolean isNull = textVal == null;
                parser.setAttribute(col, AbstractDBO.NULL_NAME, String.valueOf(isNull));
                if (isNull) {
                    textVal = "";
                }
            }
            }
            if (textVal != null) {
                text = doc.createTextNode(textVal);
                col.appendChild(text);
            }
            if (!noKey && keyField.contains(new Integer(j))) {
                if (textVal != null) {
                    if (colKey == null) {
                        colKey = textVal;
                    } else {
                        colKey += "##" + textVal;
                    }
                    keyAttr.put("key_" + j, textVal);
                }
            } else {
                row.appendChild(col);
            }
        }
        if (noKey) {
            if (data == null) {
                data = parser.createElement(doc, AbstractDBO.DATA_NAME);
                parser.setAttribute(data, AbstractDBO.ID_NAME, id);
            }
        } else if ((colKey != null) && !colKey.equals(precKey)) {
            if (data != null) {
                docRoot.appendChild(data);
            }
            data = parser.createElement(doc, AbstractDBO.DATA_NAME);
            parser.setAttribute(data, AbstractDBO.ID_NAME, id);
            for (Entry<String, String> keyAttrEntry : keyAttr.entrySet()) {
                parser.setAttribute(data, keyAttrEntry.getKey(), keyAttrEntry.getValue());
            }
            keyAttr.clear();
            precKey = colKey;
        }
        colKey = null;
        data.appendChild(row);
        rowCounter++;
    }
    if (data != null) {
        docRoot.appendChild(data);
    }

    return rowCounter;
}

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From source file:it.greenvulcano.gvesb.datahandling.dbo.utils.ExtendedRowSetBuilder.java

public int build(Document doc, String id, ResultSet rs, Set<Integer> keyField,
        Map<String, FieldFormatter> fieldNameToFormatter, Map<String, FieldFormatter> fieldIdToFormatter)
        throws Exception {
    if (rs == null) {
        return 0;
    }/*from w  w w .  j ava  2  s. co  m*/
    int rowCounter = 0;
    Element docRoot = doc.getDocumentElement();
    ResultSetMetaData metadata = rs.getMetaData();
    buildFormatterAndNamesArray(metadata, fieldNameToFormatter, fieldIdToFormatter);

    boolean noKey = ((keyField == null) || keyField.isEmpty());
    boolean isKeyCol = false;

    boolean isNull = false;
    Element data = null;
    Element row = null;
    Element col = null;
    Text text = null;
    String textVal = null;
    String precKey = null;
    String colKey = null;
    Map<String, Element> keyCols = new TreeMap<String, Element>();
    while (rs.next()) {
        if (rowCounter % 10 == 0) {
            ThreadUtils.checkInterrupted(getClass().getSimpleName(), name, logger);
        }
        row = parser.createElementNS(doc, AbstractDBO.ROW_NAME, NS);

        parser.setAttribute(row, AbstractDBO.ID_NAME, id);
        for (int j = 1; j <= metadata.getColumnCount(); j++) {
            FieldFormatter fF = fFormatters[j];
            String colName = colNames[j];

            isKeyCol = (!noKey && keyField.contains(new Integer(j)));
            isNull = false;
            col = parser.createElementNS(doc, colName, NS);
            if (isKeyCol) {
                parser.setAttribute(col, AbstractDBO.ID_NAME, String.valueOf(j));
            }
            switch (metadata.getColumnType(j)) {
            case Types.DATE:
            case Types.TIME:
            case Types.TIMESTAMP: {
                parser.setAttribute(col, AbstractDBO.TYPE_NAME, AbstractDBO.TIMESTAMP_TYPE);
                Timestamp dateVal = rs.getTimestamp(j);
                isNull = dateVal == null;
                parser.setAttribute(col, AbstractDBO.NULL_NAME, String.valueOf(isNull));
                if (isNull) {
                    parser.setAttribute(col, AbstractDBO.FORMAT_NAME, AbstractDBO.DEFAULT_DATE_FORMAT);
                    textVal = "";
                } else {
                    if (fF != null) {
                        parser.setAttribute(col, AbstractDBO.FORMAT_NAME, fF.getDateFormat());
                        textVal = fF.formatDate(dateVal);
                    } else {
                        parser.setAttribute(col, AbstractDBO.FORMAT_NAME, AbstractDBO.DEFAULT_DATE_FORMAT);
                        textVal = dateFormatter.format(dateVal);
                    }
                }
            }
                break;
            case Types.DOUBLE:
            case Types.FLOAT:
            case Types.REAL: {
                parser.setAttribute(col, AbstractDBO.TYPE_NAME, AbstractDBO.FLOAT_TYPE);
                float numVal = rs.getFloat(j);
                parser.setAttribute(col, AbstractDBO.NULL_NAME, "false");
                if (fF != null) {
                    parser.setAttribute(col, AbstractDBO.FORMAT_NAME, fF.getNumberFormat());
                    parser.setAttribute(col, AbstractDBO.GRP_SEPARATOR_NAME, fF.getGroupSeparator());
                    parser.setAttribute(col, AbstractDBO.DEC_SEPARATOR_NAME, fF.getDecSeparator());
                    textVal = fF.formatNumber(numVal);
                } else {
                    parser.setAttribute(col, AbstractDBO.FORMAT_NAME, numberFormat);
                    parser.setAttribute(col, AbstractDBO.GRP_SEPARATOR_NAME, groupSeparator);
                    parser.setAttribute(col, AbstractDBO.DEC_SEPARATOR_NAME, decSeparator);
                    textVal = numberFormatter.format(numVal);
                }
            }
                break;
            case Types.BIGINT:
            case Types.INTEGER:
            case Types.NUMERIC:
            case Types.SMALLINT:
            case Types.TINYINT: {
                BigDecimal bigdecimal = rs.getBigDecimal(j);
                isNull = bigdecimal == null;
                parser.setAttribute(col, AbstractDBO.NULL_NAME, String.valueOf(isNull));
                if (isNull) {
                    if (metadata.getScale(j) > 0) {
                        parser.setAttribute(col, AbstractDBO.TYPE_NAME, AbstractDBO.FLOAT_TYPE);
                    } else {
                        parser.setAttribute(col, AbstractDBO.TYPE_NAME, AbstractDBO.NUMERIC_TYPE);
                    }
                    textVal = "";
                } else {
                    if (fF != null) {
                        parser.setAttribute(col, AbstractDBO.TYPE_NAME, AbstractDBO.FLOAT_TYPE);
                        parser.setAttribute(col, AbstractDBO.FORMAT_NAME, fF.getNumberFormat());
                        parser.setAttribute(col, AbstractDBO.GRP_SEPARATOR_NAME, fF.getGroupSeparator());
                        parser.setAttribute(col, AbstractDBO.DEC_SEPARATOR_NAME, fF.getDecSeparator());
                        textVal = fF.formatNumber(bigdecimal);
                    } else if (metadata.getScale(j) > 0) {
                        parser.setAttribute(col, AbstractDBO.TYPE_NAME, AbstractDBO.FLOAT_TYPE);
                        parser.setAttribute(col, AbstractDBO.FORMAT_NAME, numberFormat);
                        parser.setAttribute(col, AbstractDBO.GRP_SEPARATOR_NAME, groupSeparator);
                        parser.setAttribute(col, AbstractDBO.DEC_SEPARATOR_NAME, decSeparator);
                        textVal = numberFormatter.format(bigdecimal);
                    } else {
                        parser.setAttribute(col, AbstractDBO.TYPE_NAME, AbstractDBO.NUMERIC_TYPE);
                        textVal = bigdecimal.toString();
                    }
                }
            }
                break;
            case Types.NCHAR:
            case Types.NVARCHAR: {
                parser.setAttribute(col, AbstractDBO.TYPE_NAME, AbstractDBO.NSTRING_TYPE);
                textVal = rs.getNString(j);
                isNull = textVal == null;
                parser.setAttribute(col, AbstractDBO.NULL_NAME, String.valueOf(isNull));
                if (isNull) {
                    textVal = "";
                }
            }
                break;
            case Types.CHAR:
            case Types.VARCHAR: {
                parser.setAttribute(col, AbstractDBO.TYPE_NAME, AbstractDBO.STRING_TYPE);
                textVal = rs.getString(j);
                isNull = textVal == null;
                parser.setAttribute(col, AbstractDBO.NULL_NAME, String.valueOf(isNull));
                if (isNull) {
                    textVal = "";
                }
            }
                break;
            case Types.NCLOB: {
                parser.setAttribute(col, AbstractDBO.TYPE_NAME, AbstractDBO.LONG_NSTRING_TYPE);
                NClob clob = rs.getNClob(j);
                isNull = clob == null;
                parser.setAttribute(col, AbstractDBO.NULL_NAME, String.valueOf(isNull));
                if (isNull) {
                    textVal = "";
                } else {
                    Reader is = clob.getCharacterStream();
                    StringWriter str = new StringWriter();

                    IOUtils.copy(is, str);
                    is.close();
                    textVal = str.toString();
                }
            }
                break;
            case Types.CLOB: {
                parser.setAttribute(col, AbstractDBO.TYPE_NAME, AbstractDBO.LONG_STRING_TYPE);
                Clob clob = rs.getClob(j);
                isNull = clob == null;
                parser.setAttribute(col, AbstractDBO.NULL_NAME, String.valueOf(isNull));
                if (isNull) {
                    textVal = "";
                } else {
                    Reader is = clob.getCharacterStream();
                    StringWriter str = new StringWriter();

                    IOUtils.copy(is, str);
                    is.close();
                    textVal = str.toString();
                }
            }
                break;
            case Types.BLOB: {
                parser.setAttribute(col, AbstractDBO.TYPE_NAME, AbstractDBO.BASE64_TYPE);
                Blob blob = rs.getBlob(j);
                isNull = blob == null;
                parser.setAttribute(col, AbstractDBO.NULL_NAME, String.valueOf(isNull));
                if (isNull) {
                    textVal = "";
                } else {
                    InputStream is = blob.getBinaryStream();
                    ByteArrayOutputStream baos = new ByteArrayOutputStream();
                    IOUtils.copy(is, baos);
                    is.close();
                    try {
                        byte[] buffer = Arrays.copyOf(baos.toByteArray(), (int) blob.length());
                        textVal = Base64.getEncoder().encodeToString(buffer);
                    } catch (SQLFeatureNotSupportedException exc) {
                        textVal = Base64.getEncoder().encodeToString(baos.toByteArray());
                    }
                }
            }
                break;
            default: {
                parser.setAttribute(col, AbstractDBO.TYPE_NAME, AbstractDBO.DEFAULT_TYPE);
                textVal = rs.getString(j);
                isNull = textVal == null;
                parser.setAttribute(col, AbstractDBO.NULL_NAME, String.valueOf(isNull));
                if (isNull) {
                    textVal = "";
                }
            }
            }
            if (textVal != null) {
                text = doc.createTextNode(textVal);
                col.appendChild(text);
            }
            if (isKeyCol) {
                if (textVal != null) {
                    if (colKey == null) {
                        colKey = textVal;
                    } else {
                        colKey += "##" + textVal;
                    }
                    keyCols.put(String.valueOf(j), col);
                }
            } else {
                row.appendChild(col);
            }
        }
        if (noKey) {
            if (data == null) {
                data = parser.createElementNS(doc, AbstractDBO.DATA_NAME, NS);
                parser.setAttribute(data, AbstractDBO.ID_NAME, id);
            }
        } else if ((colKey != null) && !colKey.equals(precKey)) {
            if (data != null) {
                docRoot.appendChild(data);
            }
            data = parser.createElementNS(doc, AbstractDBO.DATA_NAME, NS);
            parser.setAttribute(data, AbstractDBO.ID_NAME, id);
            Element key = parser.createElementNS(doc, AbstractDBO.KEY_NAME, NS);
            data.appendChild(key);
            for (Entry<String, Element> keyColsEntry : keyCols.entrySet()) {
                key.appendChild(keyColsEntry.getValue());
            }
            keyCols.clear();
            precKey = colKey;
        }
        colKey = null;
        data.appendChild(row);
        rowCounter++;
    }
    if (data != null) {
        docRoot.appendChild(data);
    }

    return rowCounter;
}

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