Package org.verapdf.xmp.impl

Class Utils

java.lang.Object

org.verapdf.xmp.impl.Utils

All Implemented Interfaces:

XMPConst

public class Utils
extends Object
implements XMPConst

Utility functions for the XMPToolkit implementation.

Since:

06.06.2006

Field Summary

Fields

Modifier and Type	Field	Description
static int	UUID_LENGTH	length of a UUID
static int	UUID_SEGMENT_COUNT	segments of a UUID

Fields inherited from interface org.verapdf.xmp.XMPConst

ARRAY_ITEM_NAME, ARRAY_LAST_ITEM, FALSESTR, NS_ADOBESTOCKPHOTO, NS_ASF, NS_BWF, NS_CAMERARAW, NS_CREATOR_ATOM, NS_DC, NS_DC_DEPRECATED, NS_DICOM, NS_DM, NS_EXIF, NS_EXIF_AUX, NS_EXIFX, NS_IPTCCORE, NS_IPTCEXT, NS_IX, NS_JP2K, NS_JPEG, NS_PDF, NS_PDFA_EXTENSION, NS_PDFA_FIELD, NS_PDFA_ID, NS_PDFA_PROPERTY, NS_PDFA_SCHEMA, NS_PDFA_TYPE, NS_PDFUA_ID, NS_PDFX, NS_PDFX_ID, NS_PHOTOSHOP, NS_PLUS, NS_PNG, NS_PSALBUM, NS_RDF, NS_RIFFINFO, NS_SCRIPT, NS_SWF, NS_TIFF, NS_TRANSIENT, NS_TXMP, NS_WAV, NS_X, NS_XML, NS_XMP, NS_XMP_BJ, NS_XMP_MM, NS_XMP_NOTE, NS_XMP_RIGHTS, RDF_TYPE, TAG_XAPMETA, TAG_XMPMETA, TRUESTR, TYPE_DIMENSIONS, TYPE_FONT, TYPE_GRAPHICS, TYPE_IDENTIFIERQUAL, TYPE_IMAGE, TYPE_MANIFESTITEM, TYPE_PAGEDFILE, TYPE_RESOURCEEVENT, TYPE_RESOURCEREF, TYPE_ST_JOB, TYPE_ST_VERSION, TYPE_TEXT, X_DEFAULT, XML_LANG, XMP_PI

Method Summary

Modifier and Type	Method	Description
static String	escapeXML(String value, boolean forAttribute, boolean escapeWhitespaces)	Serializes the node value in XML encoding.
static boolean	isXMLName(String name)	Simple check for valid XMLNames.
static boolean	isXMLNameNS(String name)	Checks if the value is a legal "unqualified" XML name, as defined in the XML Namespaces proposed recommendation.
static String	normalizeLangValue(String value)	Normalize an xml:lang value so that comparisons are effectively case insensitive as required by RFC 3066 (which superceeds RFC 1766).

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

UUID_SEGMENT_COUNT

public static final int UUID_SEGMENT_COUNT

segments of a UUID

See Also:

Constant Field Values

UUID_LENGTH

public static final int UUID_LENGTH

length of a UUID

See Also:

Constant Field Values

Method Detail

normalizeLangValue

public static String normalizeLangValue(String value)

Normalize an xml:lang value so that comparisons are effectively case insensitive as required by RFC 3066 (which superceeds RFC 1766). The normalization rules:

• The primary subtag is lower case, the suggested practice of ISO 639.
• All 2 letter secondary subtags are upper case, the suggested practice of ISO 3166.
• All other subtags are lower case.

Parameters:

value - raw value

Returns:

Returns the normalized value.

isXMLName

public static boolean isXMLName(String name)

Simple check for valid XMLNames. Within ASCII range
":" | [A-Z] | "_" | [a-z] | [#xC0-#xD6] | [#xD8-#xF6]
are accepted, above all characters (which is not entirely correct according to the XML Spec.

Parameters:

name - an XML Name

Returns:

Return true if the name is correct.

isXMLNameNS

public static boolean isXMLNameNS(String name)

Checks if the value is a legal "unqualified" XML name, as defined in the XML Namespaces proposed recommendation. These are XML names, except that they must not contain a colon.

Parameters:

name - the value to check

Returns:

Returns true if the name is a valid "unqualified" XML name.

escapeXML

public static String escapeXML(String value,
                               boolean forAttribute,
                               boolean escapeWhitespaces)

Serializes the node value in XML encoding. Its used for tag bodies and attributes.
Note: The attribute is always limited by quotes, thats why ' is never serialized.
Note: Control chars are written unescaped, but if the user uses others than tab, LF and CR the resulting XML will become invalid.

Parameters:

value - a string

forAttribute - flag if string is attribute value (need to additional escape quotes)

escapeWhitespaces - Decides if LF, CR and TAB are escaped.

Returns:

Returns the value ready for XML output.