From b3802493fd51cd26f5729532219cbe1a5fc7a5e8 Mon Sep 17 00:00:00 2001
From: Bertrand Lorentz <bertrand.lorentz@publications.europa.eu>
Date: Tue, 10 Oct 2023 17:29:43 +0200
Subject: [PATCH] Remove XPathAttributeLocator class

---
 .../ted/efx/xpath/XPathAttributeLocator.java  | 114 ------------------
 1 file changed, 114 deletions(-)
 delete mode 100644 src/main/java/eu/europa/ted/efx/xpath/XPathAttributeLocator.java

diff --git a/src/main/java/eu/europa/ted/efx/xpath/XPathAttributeLocator.java b/src/main/java/eu/europa/ted/efx/xpath/XPathAttributeLocator.java
deleted file mode 100644
index 34d24ef..0000000
--- a/src/main/java/eu/europa/ted/efx/xpath/XPathAttributeLocator.java
+++ /dev/null
@@ -1,114 +0,0 @@
-package eu.europa.ted.efx.xpath;
-
-import org.antlr.v4.runtime.CharStream;
-import org.antlr.v4.runtime.CharStreams;
-import org.antlr.v4.runtime.CommonTokenStream;
-import org.antlr.v4.runtime.tree.ParseTree;
-import org.antlr.v4.runtime.tree.ParseTreeWalker;
-import org.apache.commons.lang3.StringUtils;
-
-import eu.europa.ted.efx.model.expressions.Expression;
-import eu.europa.ted.efx.model.expressions.path.NodePathExpression;
-import eu.europa.ted.efx.model.expressions.path.PathExpression;
-import eu.europa.ted.efx.xpath.XPath20Parser.AbbrevforwardstepContext;
-import eu.europa.ted.efx.xpath.XPath20Parser.PredicateContext;
-
-/**
- * Uses the {@link XPath20Parser} to extract an attribute from an XPath expression. Arguably one
- * could try to do the same thing using regular expressions, however, with the parser we can handle
- * correctly any XPath expression regardless of how complicated it maybe.
- * 
- * The reason we need to examine if an XPath expression points to an attribute is because some
- * eForms Fields represent attribute values. This means that these attributes are effectively hidden
- * behind a Field identifier and cannot be visible by the lexical analyzer or the parser. They are
- * only visible to the translator after dereferencing such Field identifiers. At this point, the
- * translator relies on this class to detect the presence of such attributes and translate
- * accordingly.
- */
-public class XPathAttributeLocator extends XPath20BaseListener {
-
-  private int inPredicate = 0;
-  private int splitPosition = -1;
-  private String path;
-  private String attribute;
-
-  /**
-   * Gets the XPath to the XML element that contains the attribute.
-   * The returned XPath therefore does not contain the attribute itself.
-   * 
-   * @return A {@link NodePathExpression} pointing to the XML element that contains the attribute.
-   */
-  public NodePathExpression getElementPath() {
-    return Expression.instantiate(path, NodePathExpression.class);
-  }
-
-  /** 
-   * Gets the name of the attribute (without the @ prefix).
-   * If the parsed XPath did not point to an attribute, then this method returns null.
-   * 
-   * @return The name of the attribute (or null if the parsed XPath did not point to an attribute).
-   */
-  public String getAttributeName() {
-    return StringUtils.isBlank(attribute) ? null : attribute;
-  }
-
-  public Boolean hasAttribute() {
-    return attribute != null;
-  }
-
-  @Override
-  public void enterPredicate(PredicateContext ctx) {
-    this.inPredicate++;
-  }
-
-  @Override
-  public void exitPredicate(PredicateContext ctx) {
-    this.inPredicate--;
-  }
-
-  @Override
-  public void exitAbbrevforwardstep(AbbrevforwardstepContext ctx) {
-    if (this.inPredicate == 0 && ctx.AT() != null) {
-      this.splitPosition = ctx.AT().getSymbol().getCharPositionInLine();
-      this.attribute = ctx.nodetest().getText();
-    }
-  }
-
-  public static XPathAttributeLocator findAttribute(final PathExpression xpath) {
-    return findAttribute(xpath.getScript());
-  }
-
-  public static XPathAttributeLocator findAttribute(final String xpath) {
-
-    final XPathAttributeLocator locator = new XPathAttributeLocator();
-
-    if (!xpath.contains("@")) {
-      locator.path = xpath;
-      locator.attribute = null;
-      return locator;
-    }
-
-    final CharStream inputStream = CharStreams.fromString(xpath);
-    final XPath20Lexer lexer = new XPath20Lexer(inputStream);
-    final CommonTokenStream tokens = new CommonTokenStream(lexer);
-    final XPath20Parser parser = new XPath20Parser(tokens);
-    final ParseTree tree = parser.xpath();
-    final ParseTreeWalker walker = new ParseTreeWalker();
-
-    walker.walk(locator, tree);
-
-    if (locator.splitPosition > -1) {
-      // The attribute we are looking for is at splitPosition
-      String path = xpath.substring(0, locator.splitPosition);
-      while (path.endsWith("/")) {
-        path = path.substring(0, path.length() - 1);
-      }
-      locator.path = path;
-    } else {
-      // the XPAth does not point to an attribute
-      locator.path = xpath;
-    }
-
-    return locator;
-  }
-}