[21919] | 1 | package org.greenstone.admin.guiext;
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| 2 |
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| 3 | import org.w3c.dom.Element;
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| 4 | import org.w3c.dom.NodeList;
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| 5 | import org.w3c.dom.Node;
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| 6 |
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| 7 | public class ExtXMLHelper
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| 8 | {
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| 9 | static public final String EXTENSION = "extension";
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| 10 | static public final String GROUP = "group";
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[21990] | 11 | static public final String FILE_STEM = "fileStem";
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[21919] | 12 | static public final String NAME = "name";
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| 13 | static public final String DOWNLOAD = "download";
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| 14 | static public final String MAIN_SOURCE = "mainSource";
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| 15 | static public final String AUX_SOURCE = "auxSource";
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| 16 | static public final String SOURCE = "source";
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| 17 | static public final String INSTALL = "install";
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| 18 | static public final String UNINSTALL = "uninstall";
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| 19 | static public final String ENABLE = "enable";
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| 20 | static public final String DISABLE = "disable";
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| 21 | static public final String DESTINATION = "destination";
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| 22 | static public final String DESCRIPTION = "description";
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| 23 | static public final String PROPERTY = "property";
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[21990] | 24 | static public final String SEQUENCE_LIST = "sequenceList";
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[21919] | 25 | static public final String STEP ="step";
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| 26 | static public final String COMMAND ="command";
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| 27 | static public final String CALLBACK ="callback";
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| 28 | static public final String OPTION_LIST = "optionList";
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| 29 | static public final String OPTION = "option";
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| 30 | static public final String CLASS = "class";
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| 31 | static public final String OS = "os";
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| 32 |
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| 33 | private ExtXMLHelper(){}
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| 34 |
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| 35 | public static String getValueFromSingleElement(Element parent, String valueName, boolean strict)
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| 36 | {
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| 37 | if(parent == null){
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| 38 | System.err.println("Parent element is null");
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| 39 | return null;
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| 40 | }
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| 41 | else if(valueName == null){
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| 42 | System.err.println("Value name element is null");
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| 43 | return null;
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| 44 | }
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| 45 |
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| 46 | Element e = getSingleChildElement(parent, valueName, strict);
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| 47 | if(e == null){
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| 48 | System.err.println("Cannot get a value from element \"" + valueName +"\" as it does not exist in this parent");
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| 49 | return null;
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| 50 | }
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| 51 |
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| 52 | String s = getValueFromSingleElement(e, strict);
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| 53 | if(s == null){
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| 54 | if(strict){
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| 55 | System.err.println("Cannot get a value from the element \"" + valueName + "\" as it is empty");
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| 56 | }
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| 57 |
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| 58 | return null;
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| 59 | }
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| 60 |
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| 61 | return s;
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| 62 | }
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| 63 |
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| 64 | public static String getValueFromSingleElement(Element e, boolean strict)
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| 65 | {
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| 66 | if(e == null){
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| 67 | System.err.println("Element is null");
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| 68 | return null;
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| 69 | }
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| 70 |
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| 71 | Node textChild = e.getFirstChild();
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| 72 | if(textChild == null){
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| 73 | if(strict){
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| 74 | System.err.println("This element has no value");
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| 75 | }
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| 76 | return null;
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| 77 | }
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| 78 |
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| 79 | String value = textChild.getNodeValue();
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| 80 | if(value.equals("")){
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| 81 | if(strict){
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| 82 | System.err.println("The value for this element is empty");
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| 83 | }
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| 84 | return null;
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| 85 | }
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| 86 | return value;
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| 87 | }
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| 88 |
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| 89 | public static Element getSingleChildElement(Element parent, String elementName, boolean strict)
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| 90 | {
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| 91 | if(parent == null){
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| 92 | System.err.println("Parent element is null");
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| 93 | return null;
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| 94 | }
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| 95 | else if(elementName == null){
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| 96 | System.err.println("Element name is null");
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| 97 | return null;
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| 98 | }
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| 99 |
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| 100 | NodeList nodeList = parent.getElementsByTagName(elementName);
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| 101 | if(nodeList == null || nodeList.getLength() == 0){
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| 102 | if(strict){
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| 103 | System.err.println("The element " + elementName + " does not exist in this parent element");
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| 104 | }
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| 105 | return null;
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| 106 | }
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| 107 | else if(nodeList.getLength() > 1){
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| 108 | System.err.println("The element " + elementName + " has more than one element in this parent element");
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| 109 | return null;
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| 110 | }
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| 111 |
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| 112 | return (Element)nodeList.item(0);
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| 113 | }
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| 114 |
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| 115 | public static Element[] getMultipleChildElements(Element parent, String elementName, boolean strict)
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| 116 | {
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| 117 | if(parent == null){
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| 118 | System.err.println("Parent element is null");
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| 119 | return null;
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| 120 | }
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| 121 | else if(elementName == null){
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| 122 | System.err.println("Element name is null");
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| 123 | return null;
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| 124 | }
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| 125 |
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| 126 | NodeList nodeList = parent.getElementsByTagName(elementName);
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| 127 | if(nodeList == null || nodeList.getLength() == 0){
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| 128 | if(strict){
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| 129 | System.err.println("The element " + elementName + " does not exist in this parent element");
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| 130 | }
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| 131 | return null;
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| 132 | }
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| 133 |
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| 134 | Element[] elements = new Element[nodeList.getLength()];
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| 135 |
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| 136 | for(int i = 0; i < nodeList.getLength(); i++){
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| 137 | elements[i] = (Element)nodeList.item(i);
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| 138 | }
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| 139 |
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| 140 | return elements;
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| 141 | }
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| 142 | } |
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