forked from D-Net/dnet-hadoop
85 lines
3.2 KiB
Java
85 lines
3.2 KiB
Java
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package eu.dnetlib.dhp.collection;
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import org.apache.commons.logging.Log;
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import org.apache.commons.logging.LogFactory;
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public class JsonUtils {
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private static final Log log = LogFactory.getLog(JsonUtils.class);
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public static final String wrapName = "recordWrap";
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/**
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* convert in JSON-KeyName 'whitespace(s)' to '_' and '/' to '_', '(' and ')' to ''
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* check W3C XML syntax: https://www.w3.org/TR/2006/REC-xml11-20060816/#sec-starttags for valid tag names
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* and work-around for the JSON to XML converting of org.json.XML-package.
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*
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* known bugs: doesn't prevent "key name":" ["sexy name",": penari","erotic dance"],
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*
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* @param jsonInput
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* @return convertedJsonKeynameOutput
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*/
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public String syntaxConvertJsonKeyNames(String jsonInput) {
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log.trace("before convertJsonKeyNames: " + jsonInput);
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// pre-clean json - rid spaces of element names (misinterpreted as elements with attributes in xml)
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// replace ' 's in JSON Namens with '_'
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while (jsonInput.matches(".*\"([^\"]*)\\s+([^\"]*)\":.*")) {
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jsonInput = jsonInput.replaceAll("\"([^\"]*)\\s+([^\"]*)\":", "\"$1_$2\":");
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}
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// replace forward-slash (sign '/' ) in JSON Names with '_'
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while (jsonInput.matches(".*\"([^\"]*)/([^\"]*)\":.*")) {
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jsonInput = jsonInput.replaceAll("\"([^\"]*)/([^\"]*)\":", "\"$1_$2\":");
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}
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// replace '(' in JSON Names with ''
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while (jsonInput.matches(".*\"([^\"]*)[(]([^\"]*)\":.*")) {
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jsonInput = jsonInput.replaceAll("\"([^\"]*)[(]([^\"]*)\":", "\"$1$2\":");
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}
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// replace ')' in JSON Names with ''
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while (jsonInput.matches(".*\"([^\"]*)[)]([^\"]*)\":.*")) {
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jsonInput = jsonInput.replaceAll("\"([^\"]*)[)]([^\"]*)\":", "\"$1$2\":");
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}
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// add prefix of startNumbers in JSON Keynames with 'n_'
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while (jsonInput.matches(".*\"([^\"][0-9])([^\"]*)\":.*")) {
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jsonInput = jsonInput.replaceAll("\"([^\"][0-9])([^\"]*)\":", "\"n_$1$2\":");
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}
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// add prefix of only numbers in JSON Keynames with 'm_'
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while (jsonInput.matches(".*\"([0-9]+)\":.*")) {
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jsonInput = jsonInput.replaceAll("\"([0-9]+)\":", "\"m_$1\":");
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}
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// replace ':' between number like '2018-08-28T11:05:00Z' in JSON keynames with ''
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while (jsonInput.matches(".*\"([^\"]*[0-9]):([0-9][^\"]*)\":.*")) {
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jsonInput = jsonInput.replaceAll("\"([^\"]*[0-9]):([0-9][^\"]*)\":", "\"$1$2\":");
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}
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// replace ',' in JSON Keynames with '.' to prevent , in xml tagnames.
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// while (jsonInput.matches(".*\"([^\"]*),([^\"]*)\":.*")) {
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// jsonInput = jsonInput.replaceAll("\"([^\"]*),([^\"]*)\":", "\"$1.$2\":");
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// }
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// replace '=' in JSON Keynames with '-'
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while (jsonInput.matches(".*\"([^\"]*)=([^\"]*)\":.*")) {
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jsonInput = jsonInput.replaceAll("\"([^\"]*)=([^\"]*)\":", "\"$1-$2\":");
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}
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log.trace("after syntaxConvertJsonKeyNames: " + jsonInput);
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return jsonInput;
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}
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public String convertToXML(final String jsonRecord) {
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String resultXml = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>";
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org.json.JSONObject jsonObject = new org.json.JSONObject(syntaxConvertJsonKeyNames(jsonRecord));
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resultXml += org.json.XML.toString(jsonObject, wrapName); // wrap xml in single root element
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log.trace("before inputStream: " + resultXml);
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resultXml = XmlCleaner.cleanAllEntities(resultXml);
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log.trace("after cleaning: " + resultXml);
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return resultXml;
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}
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}
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