org.openrdf.util.xml.XmlUtil Maven / Gradle / Ivy
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/* Sesame - Storage and Querying architecture for RDF and RDF Schema
* Copyright (C) 2001-2006 Aduna
*
* Contact:
* Aduna
* Prinses Julianaplein 14 b
* 3817 CS Amersfoort
* The Netherlands
* tel. +33 (0)33 465 99 87
* fax. +33 (0)33 465 99 87
*
* http://aduna-software.com/
* http://www.openrdf.org/
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
package org.openrdf.util.xml;
import org.openrdf.util.StringUtil;
public class XmlUtil {
/**
* Escapes any special characters in the supplied text so that it can be
* included as character data in an XML document. The characters that are
* escaped are &, <, > and carriage
* return (\r).
*/
public static String escapeCharacterData(String text) {
text = StringUtil.gsub("&", "&", text);
text = StringUtil.gsub("<", "<", text);
text = StringUtil.gsub(">", ">", text);
text = StringUtil.gsub("\r", "
", text);
return text;
}
/**
* Escapes any special characters in the supplied value so that it can be
* used as an double-quoted attribute value in an XML document. The
* characters that are escaped are &, <,
* >, tab (\t), carriage return (\r),
* line feed (\n) and ".
*/
public static String escapeDoubleQuotedAttValue(String value) {
value = _escapeAttValue(value);
value = StringUtil.gsub("\"", """, value);
return value;
}
/**
* Escapes any special characters in the supplied value so that it can be
* used as an single-quoted attribute value in an XML document. The
* characters that are escaped are &, <,
* >, tab (\t), carriage return (\r),
* line feed (\n) and '.
*/
public static String escapeSingleQuotedAttValue(String value) {
value = _escapeAttValue(value);
value = StringUtil.gsub("'", "'", value);
return value;
}
private static String _escapeAttValue(String value) {
value = StringUtil.gsub("&", "&", value);
value = StringUtil.gsub("<", "<", value);
value = StringUtil.gsub(">", ">", value);
value = StringUtil.gsub("\t", " ", value);
value = StringUtil.gsub("\n", "
", value);
value = StringUtil.gsub("\r", "
", value);
return value;
}
/**
* Replaces all XML character entities with the character they represent.
**/
public static String resolveEntities(String text) {
StringBuffer result = new StringBuffer();
int ampIndex = text.indexOf("&");
int prevIndex = 0;
while (ampIndex >= 0) {
result.append(text.substring(prevIndex, ampIndex));
int colonIndex = text.indexOf(";", ampIndex);
result.append(
resolveEntity( text.substring(ampIndex + 1, colonIndex) )
);
prevIndex = colonIndex + 1;
ampIndex = text.indexOf("&", prevIndex);
}
result.append(text.substring(prevIndex));
return result.toString();
}
/**
* Resolves an entity reference or character reference to its value.
*
* @param entName The 'name' of the reference. This is the string between
* & and ;, e.g. amp, quot, #65 or #x41.
* @return The value of the supplied reference, or the reference itself
* if it could not be resolved.
**/
public static String resolveEntity(String entName) {
if (entName.startsWith("#")) {
// character reference
StringBuffer result = new StringBuffer();
if (entName.charAt(1) == 'x') {
// Hex-notation
result.append((char)Integer.parseInt(entName.substring(2), 16));
}
else {
// Dec-notation
result.append((char)Integer.parseInt(entName.substring(1)));
}
return result.toString();
}
else if (entName.equals("apos")) {
return "'";
}
else if (entName.equals("quot")) {
return "\"";
}
else if (entName.equals("gt")) {
return ">";
}
else if (entName.equals("lt")) {
return "<";
}
else if (entName.equals("amp")) {
return "&";
}
else {
return entName;
}
}
/**
* Tries to find a point in the supplied URI where this URI can be
* safely split into a namespace part and a local name. According
* to the XML specifications, a local name must start with a letter
* or underscore and can be followed by zero or more 'NCName'
* characters.
*
* @param uri The URI to split.
* @return The index of the first character of the local name, or
* -1 if the URI can not be split into a namespace and
* local name.
**/
public static int findSplitIndex(String uri) {
int uriLength = uri.length();
// Search last character that is not an NCName character
int i = uriLength - 1;
while (i >= 0) {
char c = uri.charAt(i);
// Check for # and / characters explicitly as these
// are used as the end of a namespace very frequently
if (c == '#' || c == '/' || !XmlUtil.isNCNameChar(c)) {
// Found it at index i
break;
}
i--;
}
// Character after the just found non-NCName character could
// be an NCName character, but not a letter or underscore.
// Skip characters that are not letters or underscores.
i++;
while (i < uriLength) {
char c = uri.charAt(i);
if (c == '_' || XmlUtil.isLetter(c)) {
break;
}
i++;
}
// Check that a legal split point has been found
if (i == uriLength) {
i = -1;
}
return i;
}
/**
* Checks whether the supplied String is an NCName (Namespace Classified Name)
* as specified at
* http://www.w3.org/TR/REC-xml-names/#NT-NCName.
**/
public static final boolean isNCName(String name) {
int nameLength = name.length();
if (nameLength == 0) {
return false;
}
// Check first character
char c = name.charAt(0);
if (c == '_' || isLetter(c)) {
// Check the rest of the characters
for (int i = 1; i < nameLength; i++) {
c = name.charAt(i);
if (!isNCNameChar(c)) {
return false;
}
}
// All characters have been checked
return true;
}
return false;
}
public static final boolean isNCNameChar(char c) {
return
_isAsciiBaseChar(c) ||
_isAsciiDigit(c) ||
c == '.' || c == '-' || c == '_' ||
_isNonAsciiBaseChar(c) ||
_isNonAsciiDigit(c) ||
isIdeographic(c) ||
isCombiningChar(c) ||
isExtender(c);
}
public static final boolean isLetter(char c) {
return
_isAsciiBaseChar(c) ||
_isNonAsciiBaseChar(c) ||
isIdeographic(c);
}
private static final boolean _isAsciiBaseChar(char c) {
return
_charInRange(c, 0x0041, 0x005A) ||
_charInRange(c, 0x0061, 0x007A);
}
private static final boolean _isNonAsciiBaseChar(char c) {
return
_charInRange(c, 0x00C0, 0x00D6) ||
_charInRange(c, 0x00D8, 0x00F6) ||
_charInRange(c, 0x00F8, 0x00FF) ||
_charInRange(c, 0x0100, 0x0131) ||
_charInRange(c, 0x0134, 0x013E) ||
_charInRange(c, 0x0141, 0x0148) ||
_charInRange(c, 0x014A, 0x017E) ||
_charInRange(c, 0x0180, 0x01C3) ||
_charInRange(c, 0x01CD, 0x01F0) ||
_charInRange(c, 0x01F4, 0x01F5) ||
_charInRange(c, 0x01FA, 0x0217) ||
_charInRange(c, 0x0250, 0x02A8) ||
_charInRange(c, 0x02BB, 0x02C1) ||
c == 0x0386 ||
_charInRange(c, 0x0388, 0x038A) ||
c == 0x038C ||
_charInRange(c, 0x038E, 0x03A1) ||
_charInRange(c, 0x03A3, 0x03CE) ||
_charInRange(c, 0x03D0, 0x03D6) ||
c == 0x03DA ||
c == 0x03DC ||
c == 0x03DE ||
c == 0x03E0 ||
_charInRange(c, 0x03E2, 0x03F3) ||
_charInRange(c, 0x0401, 0x040C) ||
_charInRange(c, 0x040E, 0x044F) ||
_charInRange(c, 0x0451, 0x045C) ||
_charInRange(c, 0x045E, 0x0481) ||
_charInRange(c, 0x0490, 0x04C4) ||
_charInRange(c, 0x04C7, 0x04C8) ||
_charInRange(c, 0x04CB, 0x04CC) ||
_charInRange(c, 0x04D0, 0x04EB) ||
_charInRange(c, 0x04EE, 0x04F5) ||
_charInRange(c, 0x04F8, 0x04F9) ||
_charInRange(c, 0x0531, 0x0556) ||
c == 0x0559 ||
_charInRange(c, 0x0561, 0x0586) ||
_charInRange(c, 0x05D0, 0x05EA) ||
_charInRange(c, 0x05F0, 0x05F2) ||
_charInRange(c, 0x0621, 0x063A) ||
_charInRange(c, 0x0641, 0x064A) ||
_charInRange(c, 0x0671, 0x06B7) ||
_charInRange(c, 0x06BA, 0x06BE) ||
_charInRange(c, 0x06C0, 0x06CE) ||
_charInRange(c, 0x06D0, 0x06D3) ||
c == 0x06D5 ||
_charInRange(c, 0x06E5, 0x06E6) ||
_charInRange(c, 0x0905, 0x0939) ||
c == 0x093D ||
_charInRange(c, 0x0958, 0x0961) ||
_charInRange(c, 0x0985, 0x098C) ||
_charInRange(c, 0x098F, 0x0990) ||
_charInRange(c, 0x0993, 0x09A8) ||
_charInRange(c, 0x09AA, 0x09B0) ||
c == 0x09B2 ||
_charInRange(c, 0x09B6, 0x09B9) ||
_charInRange(c, 0x09DC, 0x09DD) ||
_charInRange(c, 0x09DF, 0x09E1) ||
_charInRange(c, 0x09F0, 0x09F1) ||
_charInRange(c, 0x0A05, 0x0A0A) ||
_charInRange(c, 0x0A0F, 0x0A10) ||
_charInRange(c, 0x0A13, 0x0A28) ||
_charInRange(c, 0x0A2A, 0x0A30) ||
_charInRange(c, 0x0A32, 0x0A33) ||
_charInRange(c, 0x0A35, 0x0A36) ||
_charInRange(c, 0x0A38, 0x0A39) ||
_charInRange(c, 0x0A59, 0x0A5C) ||
c == 0x0A5E ||
_charInRange(c, 0x0A72, 0x0A74) ||
_charInRange(c, 0x0A85, 0x0A8B) ||
c == 0x0A8D ||
_charInRange(c, 0x0A8F, 0x0A91) ||
_charInRange(c, 0x0A93, 0x0AA8) ||
_charInRange(c, 0x0AAA, 0x0AB0) ||
_charInRange(c, 0x0AB2, 0x0AB3) ||
_charInRange(c, 0x0AB5, 0x0AB9) ||
c == 0x0ABD ||
c == 0x0AE0 ||
_charInRange(c, 0x0B05, 0x0B0C) ||
_charInRange(c, 0x0B0F, 0x0B10) ||
_charInRange(c, 0x0B13, 0x0B28) ||
_charInRange(c, 0x0B2A, 0x0B30) ||
_charInRange(c, 0x0B32, 0x0B33) ||
_charInRange(c, 0x0B36, 0x0B39) ||
c == 0x0B3D ||
_charInRange(c, 0x0B5C, 0x0B5D) ||
_charInRange(c, 0x0B5F, 0x0B61) ||
_charInRange(c, 0x0B85, 0x0B8A) ||
_charInRange(c, 0x0B8E, 0x0B90) ||
_charInRange(c, 0x0B92, 0x0B95) ||
_charInRange(c, 0x0B99, 0x0B9A) ||
c == 0x0B9C ||
_charInRange(c, 0x0B9E, 0x0B9F) ||
_charInRange(c, 0x0BA3, 0x0BA4) ||
_charInRange(c, 0x0BA8, 0x0BAA) ||
_charInRange(c, 0x0BAE, 0x0BB5) ||
_charInRange(c, 0x0BB7, 0x0BB9) ||
_charInRange(c, 0x0C05, 0x0C0C) ||
_charInRange(c, 0x0C0E, 0x0C10) ||
_charInRange(c, 0x0C12, 0x0C28) ||
_charInRange(c, 0x0C2A, 0x0C33) ||
_charInRange(c, 0x0C35, 0x0C39) ||
_charInRange(c, 0x0C60, 0x0C61) ||
_charInRange(c, 0x0C85, 0x0C8C) ||
_charInRange(c, 0x0C8E, 0x0C90) ||
_charInRange(c, 0x0C92, 0x0CA8) ||
_charInRange(c, 0x0CAA, 0x0CB3) ||
_charInRange(c, 0x0CB5, 0x0CB9) ||
c == 0x0CDE ||
_charInRange(c, 0x0CE0, 0x0CE1) ||
_charInRange(c, 0x0D05, 0x0D0C) ||
_charInRange(c, 0x0D0E, 0x0D10) ||
_charInRange(c, 0x0D12, 0x0D28) ||
_charInRange(c, 0x0D2A, 0x0D39) ||
_charInRange(c, 0x0D60, 0x0D61) ||
_charInRange(c, 0x0E01, 0x0E2E) ||
c == 0x0E30 ||
_charInRange(c, 0x0E32, 0x0E33) ||
_charInRange(c, 0x0E40, 0x0E45) ||
_charInRange(c, 0x0E81, 0x0E82) ||
c == 0x0E84 ||
_charInRange(c, 0x0E87, 0x0E88) ||
c == 0x0E8A ||
c == 0x0E8D ||
_charInRange(c, 0x0E94, 0x0E97) ||
_charInRange(c, 0x0E99, 0x0E9F) ||
_charInRange(c, 0x0EA1, 0x0EA3) ||
c == 0x0EA5 ||
c == 0x0EA7 ||
_charInRange(c, 0x0EAA, 0x0EAB) ||
_charInRange(c, 0x0EAD, 0x0EAE) ||
c == 0x0EB0 ||
_charInRange(c, 0x0EB2, 0x0EB3) ||
c == 0x0EBD ||
_charInRange(c, 0x0EC0, 0x0EC4) ||
_charInRange(c, 0x0F40, 0x0F47) ||
_charInRange(c, 0x0F49, 0x0F69) ||
_charInRange(c, 0x10A0, 0x10C5) ||
_charInRange(c, 0x10D0, 0x10F6) ||
c == 0x1100 ||
_charInRange(c, 0x1102, 0x1103) ||
_charInRange(c, 0x1105, 0x1107) ||
c == 0x1109 ||
_charInRange(c, 0x110B, 0x110C) ||
_charInRange(c, 0x110E, 0x1112) ||
c == 0x113C ||
c == 0x113E ||
c == 0x1140 ||
c == 0x114C ||
c == 0x114E ||
c == 0x1150 ||
_charInRange(c, 0x1154, 0x1155) ||
c == 0x1159 ||
_charInRange(c, 0x115F, 0x1161) ||
c == 0x1163 ||
c == 0x1165 ||
c == 0x1167 ||
c == 0x1169 ||
_charInRange(c, 0x116D, 0x116E) ||
_charInRange(c, 0x1172, 0x1173) ||
c == 0x1175 ||
c == 0x119E ||
c == 0x11A8 ||
c == 0x11AB ||
_charInRange(c, 0x11AE, 0x11AF) ||
_charInRange(c, 0x11B7, 0x11B8) ||
c == 0x11BA ||
_charInRange(c, 0x11BC, 0x11C2) ||
c == 0x11EB ||
c == 0x11F0 ||
c == 0x11F9 ||
_charInRange(c, 0x1E00, 0x1E9B) ||
_charInRange(c, 0x1EA0, 0x1EF9) ||
_charInRange(c, 0x1F00, 0x1F15) ||
_charInRange(c, 0x1F18, 0x1F1D) ||
_charInRange(c, 0x1F20, 0x1F45) ||
_charInRange(c, 0x1F48, 0x1F4D) ||
_charInRange(c, 0x1F50, 0x1F57) ||
c == 0x1F59 ||
c == 0x1F5B ||
c == 0x1F5D ||
_charInRange(c, 0x1F5F, 0x1F7D) ||
_charInRange(c, 0x1F80, 0x1FB4) ||
_charInRange(c, 0x1FB6, 0x1FBC) ||
c == 0x1FBE ||
_charInRange(c, 0x1FC2, 0x1FC4) ||
_charInRange(c, 0x1FC6, 0x1FCC) ||
_charInRange(c, 0x1FD0, 0x1FD3) ||
_charInRange(c, 0x1FD6, 0x1FDB) ||
_charInRange(c, 0x1FE0, 0x1FEC) ||
_charInRange(c, 0x1FF2, 0x1FF4) ||
_charInRange(c, 0x1FF6, 0x1FFC) ||
c == 0x2126 ||
_charInRange(c, 0x212A, 0x212B) ||
c == 0x212E ||
_charInRange(c, 0x2180, 0x2182) ||
_charInRange(c, 0x3041, 0x3094) ||
_charInRange(c, 0x30A1, 0x30FA) ||
_charInRange(c, 0x3105, 0x312C) ||
_charInRange(c, 0xAC00, 0xD7A3);
}
public static final boolean isIdeographic(char c) {
return
_charInRange(c, 0x4E00, 0x9FA5) ||
c == 0x3007 ||
_charInRange(c, 0x3021, 0x3029);
}
public static final boolean isCombiningChar(char c) {
return
_charInRange(c, 0x0300, 0x0345) ||
_charInRange(c, 0x0360, 0x0361) ||
_charInRange(c, 0x0483, 0x0486) ||
_charInRange(c, 0x0591, 0x05A1) ||
_charInRange(c, 0x05A3, 0x05B9) ||
_charInRange(c, 0x05BB, 0x05BD) ||
c == 0x05BF ||
_charInRange(c, 0x05C1, 0x05C2) ||
c == 0x05C4 ||
_charInRange(c, 0x064B, 0x0652) ||
c == 0x0670 ||
_charInRange(c, 0x06D6, 0x06DC) ||
_charInRange(c, 0x06DD, 0x06DF) ||
_charInRange(c, 0x06E0, 0x06E4) ||
_charInRange(c, 0x06E7, 0x06E8) ||
_charInRange(c, 0x06EA, 0x06ED) ||
_charInRange(c, 0x0901, 0x0903) ||
c == 0x093C ||
_charInRange(c, 0x093E, 0x094C) ||
c == 0x094D ||
_charInRange(c, 0x0951, 0x0954) ||
_charInRange(c, 0x0962, 0x0963) ||
_charInRange(c, 0x0981, 0x0983) ||
c == 0x09BC ||
c == 0x09BE ||
c == 0x09BF ||
_charInRange(c, 0x09C0, 0x09C4) ||
_charInRange(c, 0x09C7, 0x09C8) ||
_charInRange(c, 0x09CB, 0x09CD) ||
c == 0x09D7 ||
_charInRange(c, 0x09E2, 0x09E3) ||
c == 0x0A02 ||
c == 0x0A3C ||
c == 0x0A3E ||
c == 0x0A3F ||
_charInRange(c, 0x0A40, 0x0A42) ||
_charInRange(c, 0x0A47, 0x0A48) ||
_charInRange(c, 0x0A4B, 0x0A4D) ||
_charInRange(c, 0x0A70, 0x0A71) ||
_charInRange(c, 0x0A81, 0x0A83) ||
c == 0x0ABC ||
_charInRange(c, 0x0ABE, 0x0AC5) ||
_charInRange(c, 0x0AC7, 0x0AC9) ||
_charInRange(c, 0x0ACB, 0x0ACD) ||
_charInRange(c, 0x0B01, 0x0B03) ||
c == 0x0B3C ||
_charInRange(c, 0x0B3E, 0x0B43) ||
_charInRange(c, 0x0B47, 0x0B48) ||
_charInRange(c, 0x0B4B, 0x0B4D) ||
_charInRange(c, 0x0B56, 0x0B57) ||
_charInRange(c, 0x0B82, 0x0B83) ||
_charInRange(c, 0x0BBE, 0x0BC2) ||
_charInRange(c, 0x0BC6, 0x0BC8) ||
_charInRange(c, 0x0BCA, 0x0BCD) ||
c == 0x0BD7 ||
_charInRange(c, 0x0C01, 0x0C03) ||
_charInRange(c, 0x0C3E, 0x0C44) ||
_charInRange(c, 0x0C46, 0x0C48) ||
_charInRange(c, 0x0C4A, 0x0C4D) ||
_charInRange(c, 0x0C55, 0x0C56) ||
_charInRange(c, 0x0C82, 0x0C83) ||
_charInRange(c, 0x0CBE, 0x0CC4) ||
_charInRange(c, 0x0CC6, 0x0CC8) ||
_charInRange(c, 0x0CCA, 0x0CCD) ||
_charInRange(c, 0x0CD5, 0x0CD6) ||
_charInRange(c, 0x0D02, 0x0D03) ||
_charInRange(c, 0x0D3E, 0x0D43) ||
_charInRange(c, 0x0D46, 0x0D48) ||
_charInRange(c, 0x0D4A, 0x0D4D) ||
c == 0x0D57 ||
c == 0x0E31 ||
_charInRange(c, 0x0E34, 0x0E3A) ||
_charInRange(c, 0x0E47, 0x0E4E) ||
c == 0x0EB1 ||
_charInRange(c, 0x0EB4, 0x0EB9) ||
_charInRange(c, 0x0EBB, 0x0EBC) ||
_charInRange(c, 0x0EC8, 0x0ECD) ||
_charInRange(c, 0x0F18, 0x0F19) ||
c == 0x0F35 ||
c == 0x0F37 ||
c == 0x0F39 ||
c == 0x0F3E ||
c == 0x0F3F ||
_charInRange(c, 0x0F71, 0x0F84) ||
_charInRange(c, 0x0F86, 0x0F8B) ||
_charInRange(c, 0x0F90, 0x0F95) ||
c == 0x0F97 ||
_charInRange(c, 0x0F99, 0x0FAD) ||
_charInRange(c, 0x0FB1, 0x0FB7) ||
c == 0x0FB9 ||
_charInRange(c, 0x20D0, 0x20DC) ||
c == 0x20E1 ||
_charInRange(c, 0x302A, 0x302F) ||
c == 0x3099 ||
c == 0x309A;
}
public static final boolean isDigit(char c) {
return
_isAsciiDigit(c) ||
_isNonAsciiDigit(c);
}
private static final boolean _isAsciiDigit(char c) {
return
_charInRange(c, 0x0030, 0x0039);
}
private static final boolean _isNonAsciiDigit(char c) {
return
_charInRange(c, 0x0660, 0x0669) ||
_charInRange(c, 0x06F0, 0x06F9) ||
_charInRange(c, 0x0966, 0x096F) ||
_charInRange(c, 0x09E6, 0x09EF) ||
_charInRange(c, 0x0A66, 0x0A6F) ||
_charInRange(c, 0x0AE6, 0x0AEF) ||
_charInRange(c, 0x0B66, 0x0B6F) ||
_charInRange(c, 0x0BE7, 0x0BEF) ||
_charInRange(c, 0x0C66, 0x0C6F) ||
_charInRange(c, 0x0CE6, 0x0CEF) ||
_charInRange(c, 0x0D66, 0x0D6F) ||
_charInRange(c, 0x0E50, 0x0E59) ||
_charInRange(c, 0x0ED0, 0x0ED9) ||
_charInRange(c, 0x0F20, 0x0F29);
}
public static final boolean isExtender(char c) {
return
c == 0x00B7 ||
c == 0x02D0 ||
c == 0x02D1 ||
c == 0x0387 ||
c == 0x0640 ||
c == 0x0E46 ||
c == 0x0EC6 ||
c == 0x3005 ||
_charInRange(c, 0x3031, 0x3035) ||
_charInRange(c, 0x309D, 0x309E) ||
_charInRange(c, 0x30FC, 0x30FE);
}
private static final boolean _charInRange(char c, int start, int end) {
return c >= start && c <= end;
}
}
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