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package eu.dnetlib.data.transform.xml.vtd;
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2
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3
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import java.util.*;
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4
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5
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import com.ximpleware.*;
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6
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import org.apache.commons.lang3.StringUtils;
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7
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8
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public class VtdUtilityParser {
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9
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public static final String NS_SEPARATOR = ":";
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11
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public static String xpath(final String ... p) {
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return Arrays.stream(p)
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.map(s -> String.format("/*[local-name()='%s']", s))
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.reduce((s1, s2) -> s1 + s2)
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.get();
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}
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public static VTDGen parseXml(final String xml) throws VtdException {
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final VTDGen vg = new VTDGen();
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vg.setDoc(xml.getBytes());
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try {
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vg.parse(true);
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} catch (ParseException e) {
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throw new VtdException(e);
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}
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return vg;
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}
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public static int countNodes(final AutoPilot ap, final VTDNav vn, final String xpath) throws VtdException {
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if (StringUtils.isBlank(xpath)) {
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return 0;
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}
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try {
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ap.selectXPath(xpath);
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ap.bind(vn);
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final Double i = ap.evalXPathToNumber();
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return i.intValue();
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39
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} catch (XPathParseException e) {
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40
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throw new VtdException(e);
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}
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}
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43
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public static Node getNode(final AutoPilot ap, final VTDNav vn, final String xpath) throws VtdException {
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45
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if (StringUtils.isBlank(xpath)) {
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return new Node();
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}
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try {
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ap.selectXPath(xpath);
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50
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while (ap.evalXPath() != -1) {
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return asNode(vn);
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}
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54
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return null;
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56
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} catch (Exception e) {
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throw new VtdException(e);
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}
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59
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}
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60
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public static List<Node> getNodes(final AutoPilot ap, final VTDNav vn, final String xpath) throws VtdException {
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final List<Node> results = new ArrayList<>();
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63
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if (StringUtils.isBlank(xpath)) {
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64
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return results;
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65
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}
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try {
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ap.selectXPath(xpath);
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68
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while (ap.evalXPath() != -1) {
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results.add(asNode(vn));
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}
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return results;
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} catch (Exception e) {
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throw new VtdException(e);
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75
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}
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}
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77
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private static Node asNode(final VTDNav vn) throws NavException {
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final Node currentNode = new Node();
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80
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final String name = vn.toRawString(vn.getCurrentIndex());
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81
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currentNode.setName(name.contains(NS_SEPARATOR) ? StringUtils.substringAfter(name, NS_SEPARATOR) : name);
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82
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int t = vn.getText();
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84
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if (t >= 0) {
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currentNode.setTextValue(vn.toNormalizedString(t));
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86
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}
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currentNode.setAttributes(getAttributes(vn));
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return currentNode;
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}
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90
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private static Map<String, String> getAttributes(final VTDNav vn) throws NavException {
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92
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final AutoPilot ap = new AutoPilot(vn);
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93
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ap.selectAttr("*");
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94
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Map<String, String> attributes = new HashMap<>();
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95
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int i;
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96
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while((i = ap.iterateAttr()) != -1){
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97
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attributes.put(vn.toNormalizedString(i),vn.toNormalizedString(i + 1) );
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98
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}
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return attributes;
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100
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}
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101
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102
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public static List<String> getTextValue(final AutoPilot ap, final VTDNav vn, final String xpath) throws VtdException {
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103
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final List<String> results = new ArrayList<>();
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104
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if (StringUtils.isBlank(xpath)) {
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105
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return results;
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106
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}
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107
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try {
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ap.selectXPath(xpath);
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109
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while (ap.evalXPath() != -1) {
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int t = vn.getText();
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111
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if (t > -1) results.add(vn.toNormalizedString(t));
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112
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}
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113
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return results;
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114
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} catch (Exception e) {
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115
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throw new VtdException(e);
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116
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}
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}
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118
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119
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public static String getFirstValue(final AutoPilot ap, final VTDNav nav, final String xpath) throws VtdException {
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120
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if (StringUtils.isBlank(xpath)) {
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121
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return null;
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122
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}
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123
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try {
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ap.selectXPath(xpath);
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125
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while (ap.evalXPath() != -1) {
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126
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int it = nav.getText();
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127
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if (it > -1)
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return nav.toNormalizedString(it);
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129
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}
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130
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return null;
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131
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} catch (Exception e) {
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132
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throw new VtdException(e);
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133
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}
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134
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}
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135
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136
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@Deprecated
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137
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public static String getSingleValue(final AutoPilot ap, final VTDNav nav, final String xpath) throws VtdException {
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138
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return getFirstValue(ap, nav, xpath);
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139
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}
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140
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141
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public static class Node {
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142
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143
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private String name;
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144
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145
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private String textValue;
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146
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147
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private Map<String, String> attributes;
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148
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149
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public String getTextValue() {
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150
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return textValue;
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151
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}
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152
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153
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public void setTextValue(final String textValue) {
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154
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this.textValue = textValue;
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155
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}
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156
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157
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public Map<String, String> getAttributes() {
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158
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return attributes;
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159
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}
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160
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161
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public void setAttributes(final Map<String, String> attributes) {
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162
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this.attributes = attributes;
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163
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}
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164
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165
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public String getName() {
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166
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return name;
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167
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}
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168
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169
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public void setName(final String name) {
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170
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this.name = name;
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171
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}
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172
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}
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173
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174
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}
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