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100 changes: 100 additions & 0 deletions
100
src/main/java/org/cip4/xjdf/json/openapi/SchemaReader.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,100 @@ | ||
| package org.cip4.xjdf.json.openapi; | ||
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| import lombok.SneakyThrows; | ||
| import org.w3c.dom.*; | ||
| import org.xml.sax.InputSource; | ||
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| import javax.xml.parsers.DocumentBuilderFactory; | ||
| import javax.xml.transform.Transformer; | ||
| import javax.xml.transform.TransformerFactory; | ||
| import javax.xml.transform.dom.DOMSource; | ||
| import javax.xml.transform.stream.StreamResult; | ||
| import javax.xml.xpath.XPath; | ||
| import javax.xml.xpath.XPathConstants; | ||
| import javax.xml.xpath.XPathFactory; | ||
| import java.io.InputStream; | ||
| import java.io.StringWriter; | ||
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| public class SchemaReader { | ||
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| private static XPath xPath; | ||
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| public Document readXml(InputStream sourceXsd) { | ||
| try { | ||
| DocumentBuilderFactory dbFactory = DocumentBuilderFactory.newInstance(); | ||
| dbFactory.setNamespaceAware(true); | ||
| InputSource xmlInput = new InputSource(sourceXsd); | ||
| return preprocess(dbFactory.newDocumentBuilder().parse(xmlInput)); | ||
| } catch (Exception e) { | ||
| throw new RuntimeException("Error reading XML input", e); | ||
| } | ||
| } | ||
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| public XPath getXPath() { | ||
| if (xPath == null) { | ||
| XPathFactory xpFactory = XPathFactory.newInstance(); | ||
| xPath = xpFactory.newXPath(); | ||
| xPath.setNamespaceContext(new XsdNamespaceContext()); | ||
| } | ||
| return xPath; | ||
| } | ||
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| @SneakyThrows | ||
| private Document preprocess(Document document) { | ||
| XPath xPath = getXPath(); | ||
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| // remove deprecated glue element (https://cip4.atlassian.net/browse/JDF-889) | ||
| Node glue = (Node) xPath.evaluate( | ||
| "//xs:complexType[@name=\"BoxFoldingParams\"]//xs:choice/xs:element[@ref=\"Glue\"]", | ||
| document, | ||
| XPathConstants.NODE | ||
| ); | ||
| if (glue != null) { | ||
| glue.getParentNode().removeChild(glue); | ||
| } | ||
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| // simplify trivial choice (https://cip4.atlassian.net/browse/JDF-889) | ||
| NodeList simpleChoices = (NodeList) xPath.evaluate( | ||
| "//xs:choice[count(xs:element | xs:any)=1]", | ||
| document, | ||
| XPathConstants.NODESET | ||
| ); | ||
| for (int i = 0; i < simpleChoices.getLength(); i++) { | ||
| Node simpleChoice = simpleChoices.item(i); | ||
| Node onlyChoice = (Node) xPath.evaluate( | ||
| "xs:element | xs:any", | ||
| simpleChoice, | ||
| XPathConstants.NODE | ||
| ); | ||
| if (simpleChoice.getAttributes() != null) { | ||
| NamedNodeMap attrs = simpleChoice.getAttributes(); | ||
| if (attrs.getNamedItem("minOccurs") != null) { | ||
| Node attr = attrs.removeNamedItem("minOccurs"); | ||
| document.importNode(attr, true); | ||
| onlyChoice.getAttributes().setNamedItem(attr); | ||
| } | ||
| if (attrs.getNamedItem("maxOccurs") != null) { | ||
| Node attr = attrs.removeNamedItem("maxOccurs"); | ||
| document.importNode(attr, true); | ||
| onlyChoice.getAttributes().setNamedItem(attr); | ||
| } | ||
| } | ||
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| simpleChoice.getParentNode().replaceChild(onlyChoice, simpleChoice); | ||
| } | ||
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| return document; | ||
| } | ||
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| @SneakyThrows | ||
| public String getStringFromDocument(Document doc) { | ||
| DOMSource domSource = new DOMSource(doc); | ||
| StringWriter writer = new StringWriter(); | ||
| StreamResult result = new StreamResult(writer); | ||
| TransformerFactory tf = TransformerFactory.newInstance(); | ||
| Transformer transformer = tf.newTransformer(); | ||
| transformer.transform(domSource, result); | ||
| return writer.toString(); | ||
| } | ||
|
|
||
| } |
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