Java Tutorial/XML/Namespace
Содержание
- 1 Access elements from document with namespaces
- 2 Checks whether the supplied String is an NCName (Namespace Classified Name)
- 3 Create Namespace
- 4 Creates a QName instance from the given namespace context for the given qualifiedName
- 5 Finds and returns the first child node with the given qualified name.
- 6 Finds and returns the last child node with the given qualified name.
- 7 Finds and returns the next sibling node with the given qualified name.
- 8 Get all prefixes defined on this element for the specified namespace.
- 9 Get all prefixes defined, up to the root, for a namespace URI.
- 10 Get Attribute by QName
- 11 Handling namespaces during parsing
- 12 Returns the first element that has the specified local name.
- 13 Set a namespace/prefix on an element if it is not set already.
- 14 Starting from a node, find the namespace declaration for a prefix.
Access elements from document with namespaces
<source lang="java">
import javax.xml.parsers.DocumentBuilder; import javax.xml.parsers.DocumentBuilderFactory; import org.w3c.dom.Attr; import org.w3c.dom.Document; import org.w3c.dom.Element; import org.w3c.dom.NodeList; public class Main {
public static void main(String[] argv) throws Exception { DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance(); factory.setNamespaceAware(true); factory.setValidating(true); DocumentBuilder loader = factory.newDocumentBuilder(); Document document = loader.parse("sample.xml"); String docNS = "http://www.my-company.ru"; Element order = document.getDocumentElement(); Attr date = order.getAttributeNodeNS(docNS, "date"); NodeList children = order.getElementsByTagNameNS(docNS, "item"); }
}</source>
Checks whether the supplied String is an NCName (Namespace Classified Name)
<source lang="java">
/*
* Copyright Aduna (http://www.aduna-software.ru/) (c) 1997-2006. * * Licensed under the Aduna BSD-style license. */
public class Utils {
/** * Checks whether the supplied String is an NCName (Namespace Classified * Name) as specified at * . */ 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; }
}</source>
Create Namespace
<source lang="java">
/**
* Licensed to the Apache Software Foundation (ASF) under one * or more contributor license agreements. See the NOTICE file * distributed with this work for additional information * regarding copyright ownership. The ASF licenses this file * to you under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance * with the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, * software distributed under the License is distributed on an * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY * KIND, either express or implied. See the License for the * specific language governing permissions and limitations * under the License. */
import javax.xml.XMLConstants; import org.w3c.dom.Element; import org.w3c.dom.NamedNodeMap; import org.w3c.dom.Node; /**
* Few simple utils to read DOM. This is originally from the Jakarta Commons Modeler. * * @author Costin Manolache */
public class Utils {
private static final String XMLNAMESPACE = "xmlns"; public static String createNamespace(Element el, String ns) { String p = "ns1"; int i = 1; while (getPrefix(el, ns) != null) { p = "ns" + i; i++; } el.setAttribute(XMLNAMESPACE + ":" + p, ns); return p;
}
public static String getPrefix(Element el, String ns) { NamedNodeMap atts = el.getAttributes(); for (int i = 0; i < atts.getLength(); i++) { Node node = atts.item(i); String name = node.getNodeName(); if (ns.equals(node.getNodeValue()) && (name != null && (XMLNAMESPACE.equals(name) || name.startsWith(XMLNAMESPACE + ":")))) { return node.getPrefix(); } } return null;
} }</source>
Creates a QName instance from the given namespace context for the given qualifiedName
<source lang="java">
import javax.xml.namespace.QName; import org.w3c.dom.Document; import org.w3c.dom.Element; import org.w3c.dom.Node; public class Utils {
/** * Creates a QName instance from the given namespace context for the given qualifiedName * * @param element the element to use as the namespace context * @param qualifiedName the fully qualified name * @return the QName which matches the qualifiedName */ public static QName createQName(Element element, String qualifiedName) { int index = qualifiedName.indexOf(":"); if (index >= 0) { String prefix = qualifiedName.substring(0, index); String localName = qualifiedName.substring(index + 1); String uri = recursiveGetAttributeValue(element, "xmlns:" + prefix); return new QName(uri, localName, prefix); } else { String uri = recursiveGetAttributeValue(element, "xmlns"); if (uri != null) { return new QName(uri, qualifiedName); } return new QName(qualifiedName); } } /** * Recursive method to find a given attribute value */ public static String recursiveGetAttributeValue(Element element, String attributeName) { String answer = null; try { answer = element.getAttribute(attributeName); } catch (Exception e) { } if (answer == null || answer.length() == 0) { Node parentNode = element.getParentNode(); if (parentNode instanceof Element) { return recursiveGetAttributeValue((Element) parentNode, attributeName); } } return answer; }
}</source>
Finds and returns the first child node with the given qualified name.
<source lang="java">
import org.w3c.dom.Element; import org.w3c.dom.Node; /*
* Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. * The ASF licenses this file to You under the Apache License, Version 2.0 * (the "License"); you may not use this file except in compliance with * the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */
public class Main {
/** Finds and returns the first child node with the given qualified name. */ public static Element getFirstChildElementNS(Node parent, String[][] elemNames) { // search for node Node child = parent.getFirstChild(); while (child != null) { if (child.getNodeType() == Node.ELEMENT_NODE) { for (int i = 0; i < elemNames.length; i++) { String uri = child.getNamespaceURI(); if (uri != null && uri.equals(elemNames[i][0]) && child.getLocalName().equals(elemNames[i][1])) { return (Element)child; } } } child = child.getNextSibling(); } // not found return null; } // getFirstChildElementNS(Node,String[][]):Element
}</source>
Finds and returns the last child node with the given qualified name.
<source lang="java">
import org.w3c.dom.Element; import org.w3c.dom.Node; /*
* Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. * The ASF licenses this file to You under the Apache License, Version 2.0 * (the "License"); you may not use this file except in compliance with * the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */
public class Main {
/** Finds and returns the last child node with the given qualified name. */ public static Element getLastChildElementNS(Node parent, String[][] elemNames) { // search for node Node child = parent.getLastChild(); while (child != null) { if (child.getNodeType() == Node.ELEMENT_NODE) { for (int i = 0; i < elemNames.length; i++) { String uri = child.getNamespaceURI(); if (uri != null && uri.equals(elemNames[i][0]) && child.getLocalName().equals(elemNames[i][1])) { return (Element)child; } } } child = child.getPreviousSibling(); } // not found return null; } // getLastChildElementNS(Node,String[][]):Element
}</source>
Finds and returns the next sibling node with the given qualified name.
<source lang="java">
import org.w3c.dom.Element; import org.w3c.dom.Node; /*
* Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. * The ASF licenses this file to You under the Apache License, Version 2.0 * (the "License"); you may not use this file except in compliance with * the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */
public class Main {
/** Finds and returns the next sibling node with the given qualified name. */ public static Element getNextSiblingElementNS(Node node, String[][] elemNames) { // search for node Node sibling = node.getNextSibling(); while (sibling != null) { if (sibling.getNodeType() == Node.ELEMENT_NODE) { for (int i = 0; i < elemNames.length; i++) { String uri = sibling.getNamespaceURI(); if (uri != null && uri.equals(elemNames[i][0]) && sibling.getLocalName().equals(elemNames[i][1])) { return (Element)sibling; } } } sibling = sibling.getNextSibling(); } // not found return null; } // getNextSiblingdElementNS(Node,String[][]):Element
}</source>
Get all prefixes defined on this element for the specified namespace.
<source lang="java">
/**
* Licensed to the Apache Software Foundation (ASF) under one * or more contributor license agreements. See the NOTICE file * distributed with this work for additional information * regarding copyright ownership. The ASF licenses this file * to you under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance * with the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, * software distributed under the License is distributed on an * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY * KIND, either express or implied. See the License for the * specific language governing permissions and limitations * under the License. */
import java.util.List; import javax.xml.XMLConstants; import org.w3c.dom.Element; import org.w3c.dom.NamedNodeMap; import org.w3c.dom.Node; /**
* Few simple utils to read DOM. This is originally from the Jakarta Commons Modeler. * * @author Costin Manolache */
public class Utils {
private static final String XMLNAMESPACE = "xmlns"; /** * Get all prefixes defined on this element for the specified namespace. * * @param element * @param namespaceUri * @param prefixes */ public static void getPrefixes(Element element, String namespaceUri, List<String> prefixes) { NamedNodeMap atts = element.getAttributes(); for (int i = 0; i < atts.getLength(); i++) { Node node = atts.item(i); String name = node.getNodeName(); if (namespaceUri.equals(node.getNodeValue()) && (name != null && (XMLNAMESPACE.equals(name) || name.startsWith(XMLNAMESPACE + ":")))) { prefixes.add(node.getPrefix()); } } }
}</source>
Get all prefixes defined, up to the root, for a namespace URI.
<source lang="java">
/**
* Licensed to the Apache Software Foundation (ASF) under one * or more contributor license agreements. See the NOTICE file * distributed with this work for additional information * regarding copyright ownership. The ASF licenses this file * to you under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance * with the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, * software distributed under the License is distributed on an * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY * KIND, either express or implied. See the License for the * specific language governing permissions and limitations * under the License. */
import java.util.List; import javax.xml.XMLConstants; import org.w3c.dom.Element; import org.w3c.dom.NamedNodeMap; import org.w3c.dom.Node; /**
* Few simple utils to read DOM. This is originally from the Jakarta Commons Modeler. * * @author Costin Manolache */
public class Utils {
private static final String XMLNAMESPACE = "xmlns"; /** * Get all prefixes defined, up to the root, for a namespace URI. * * @param element * @param namespaceUri * @param prefixes */ public static void getPrefixesRecursive(Element element, String namespaceUri, List<String> prefixes) { getPrefixes(element, namespaceUri, prefixes); Node parent = element.getParentNode(); if (parent instanceof Element) { getPrefixesRecursive((Element)parent, namespaceUri, prefixes); } } /** * Get all prefixes defined on this element for the specified namespace. * * @param element * @param namespaceUri * @param prefixes */ public static void getPrefixes(Element element, String namespaceUri, List<String> prefixes) { NamedNodeMap atts = element.getAttributes(); for (int i = 0; i < atts.getLength(); i++) { Node node = atts.item(i); String name = node.getNodeName(); if (namespaceUri.equals(node.getNodeValue()) && (name != null && (XMLNAMESPACE.equals(name) || name.startsWith(XMLNAMESPACE + ":")))) { prefixes.add(node.getPrefix()); } } }
}</source>
Get Attribute by QName
<source lang="java">
/**
* Licensed to the Apache Software Foundation (ASF) under one * or more contributor license agreements. See the NOTICE file * distributed with this work for additional information * regarding copyright ownership. The ASF licenses this file * to you under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance * with the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, * software distributed under the License is distributed on an * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY * KIND, either express or implied. See the License for the * specific language governing permissions and limitations * under the License. */
import javax.xml.namespace.QName; import org.w3c.dom.Element; import org.w3c.dom.NamedNodeMap; import org.w3c.dom.Node; /**
* Few simple utils to read DOM. This is originally from the Jakarta Commons * Modeler. * * @author Costin Manolache */
public class Utils {
public static String getAttribute(Element element, QName attName) { return element.getAttributeNS(attName.getNamespaceURI(), attName.getLocalPart());
} }</source>
Handling namespaces during parsing
<source lang="java">
import java.util.HashMap; import java.util.Iterator; import java.util.Map; import org.xml.sax.SAXException; import org.xml.sax.helpers.DefaultHandler; class SampleOfNamespacePrefixes extends DefaultHandler {
private Map namespaceMapping = new HashMap(); public void startPrefixMapping(String prefix, String uri) throws SAXException { namespaceMapping.put(uri, prefix); } public void endPrefixMapping(String prefix) throws SAXException { Iterator i = namespaceMapping.keySet().iterator(); for (; i.hasNext();) { String uri = (String) i.next(); String uriPrefix = (String) namespaceMapping.get(uri); if (prefix.equals(uriPrefix)) { namespaceMapping.remove(uri); break; } } }
}</source>
Returns the first element that has the specified local name.
<source lang="java">
import org.w3c.dom.Element; import org.w3c.dom.Node; public class Utils {
public static Element getFirstChild(Element e, String local) { for( Node n=e.getFirstChild(); n!=null; n=n.getNextSibling() ) { if(n.getNodeType()==Node.ELEMENT_NODE) { Element c = (Element)n; if(c.getLocalName().equals(local)) return c; } } return null;
} }</source>
Set a namespace/prefix on an element if it is not set already.
<source lang="java">
/**
* Licensed to the Apache Software Foundation (ASF) under one * or more contributor license agreements. See the NOTICE file * distributed with this work for additional information * regarding copyright ownership. The ASF licenses this file * to you under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance * with the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, * software distributed under the License is distributed on an * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY * KIND, either express or implied. See the License for the * specific language governing permissions and limitations * under the License. */
import javax.xml.XMLConstants; import org.w3c.dom.Element; import org.w3c.dom.NamedNodeMap; import org.w3c.dom.Node; /**
* Few simple utils to read DOM. This is originally from the Jakarta Commons Modeler. * * @author Costin Manolache */
public class Utils {
private static final String XMLNAMESPACE = "xmlns"; /** * Set a namespace/prefix on an element if it is not set already. First off, it searches for the element * for the prefix associated with the specified namespace. If the prefix isn"t null, then this is * returned. Otherwise, it creates a new attribute using the namespace/prefix passed as parameters. * * @param element * @param namespace * @param prefix * @return the prefix associated with the set namespace */ public static String setNamespace(Element element, String namespace, String prefix) { String pre = getPrefixRecursive(element, namespace); if (pre != null) { return pre; } element.setAttributeNS(XMLConstants.XMLNS_ATTRIBUTE_NS_URI, "xmlns:" + prefix, namespace); return prefix; } public static String getPrefixRecursive(Element el, String ns) { String prefix = getPrefix(el, ns); if (prefix == null && el.getParentNode() instanceof Element) { prefix = getPrefixRecursive((Element)el.getParentNode(), ns); } return prefix; } public static String getPrefix(Element el, String ns) { NamedNodeMap atts = el.getAttributes(); for (int i = 0; i < atts.getLength(); i++) { Node node = atts.item(i); String name = node.getNodeName(); if (ns.equals(node.getNodeValue()) && (name != null && (XMLNAMESPACE.equals(name) || name.startsWith(XMLNAMESPACE + ":")))) { return node.getPrefix(); } } return null;
} }</source>
Starting from a node, find the namespace declaration for a prefix.
<source lang="java">
/**
* Licensed to the Apache Software Foundation (ASF) under one * or more contributor license agreements. See the NOTICE file * distributed with this work for additional information * regarding copyright ownership. The ASF licenses this file * to you under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance * with the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, * software distributed under the License is distributed on an * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY * KIND, either express or implied. See the License for the * specific language governing permissions and limitations * under the License. */
import java.util.List; import javax.xml.XMLConstants; import org.w3c.dom.Element; import org.w3c.dom.NamedNodeMap; import org.w3c.dom.Node; /**
* Few simple utils to read DOM. This is originally from the Jakarta Commons Modeler. * * @author Costin Manolache */
public class Utils {
private static final String XMLNAMESPACE = "xmlns"; /** * Starting from a node, find the namespace declaration for a prefix. for a matching namespace * declaration. * * @param node search up from here to search for namespace definitions * @param searchPrefix the prefix we are searching for * @return the namespace if found. */ public static String getNamespace(Node node, String searchPrefix) { Element el; while (!(node instanceof Element)) { node = node.getParentNode(); } el = (Element)node; NamedNodeMap atts = el.getAttributes(); for (int i = 0; i < atts.getLength(); i++) { Node currentAttribute = atts.item(i); String currentLocalName = currentAttribute.getLocalName(); String currentPrefix = currentAttribute.getPrefix(); if (searchPrefix.equals(currentLocalName) && XMLNAMESPACE.equals(currentPrefix)) { return currentAttribute.getNodeValue(); } else if (isEmpty(searchPrefix) && XMLNAMESPACE.equals(currentLocalName) && isEmpty(currentPrefix)) { return currentAttribute.getNodeValue(); } } Node parent = el.getParentNode(); if (parent instanceof Element) { return getNamespace((Element)parent, searchPrefix); } return null; } public static boolean isEmpty(String str) { return str == null || str.length() == 0;
} }</source>