add: стабильная версия

.editorconfig

@@ -0,0 +1,10 @@
+root = true
+
+[*]
+charset = utf-8
+end_of_line = lf
+indent_size = 4
+indent_style = space
+insert_final_newline = true
+max_line_length = 120
+tab_width = 4

.gitattributes

@@ -0,0 +1,3 @@
+gradlew                                   text eol=lf
+gradlew.bat                               -text
+gradle/wrapper/gradle-wrapper.properties  text eol=lf

.gitignore

@@ -0,0 +1,10 @@
+### Gradle ###
+/.gradle/
+/build/
+
+### IntelliJ IDEA ###
+/.idea/libraries/
+/.idea/compiler.xml
+/.idea/jarRepositories.xml
+/.idea/misc.xml
+/.idea/modules.xml

.idea/.gitignore

@@ -0,0 +1,8 @@
+# Default ignored files
+/shelf/
+/workspace.xml
+# Editor-based HTTP Client requests
+/httpRequests/
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml

.idea/gradle.xml

@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="GradleSettings">
+    <option name="linkedExternalProjectsSettings">
+      <GradleProjectSettings>
+        <option name="externalProjectPath" value="$PROJECT_DIR$" />
+        <option name="gradleHome" value="" />
+        <option name="modules">
+          <set>
+            <option value="$PROJECT_DIR$" />
+          </set>
+        </option>
+      </GradleProjectSettings>
+    </option>
+  </component>
+</project>

.idea/vcs.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$" vcs="Git" />
+  </component>
+</project>

README.MD

@@ -0,0 +1,21 @@
+# XmlElement
+
+## Подключение к проекту
+
+### Gradle
+
+```groovy
+implementation("ru.di9:xml-element:1.0")
+```
+
+## Сборка
+
+```shell
+gradle build
+```
+
+## Установка в локальный Maven
+
+```shell
+gradle publishToMavenLocal
+```

build.gradle

@@ -0,0 +1,41 @@
+plugins {
+    id "java-library"
+    id "maven-publish"
+}
+
+wrapper {
+    gradleVersion = "8.6"
+    distributionType = Wrapper.DistributionType.BIN
+}
+
+group = "ru.di9"
+version = "1.0"
+
+repositories {
+    mavenLocal()
+    mavenCentral()
+}
+
+dependencies {
+    api("it.unimi.dsi:fastutil:8.5.12")
+
+    def junit5_version = "5.9.2"
+    testImplementation("org.junit.jupiter:junit-jupiter-api:${junit5_version}")
+    testRuntimeOnly("org.junit.jupiter:junit-jupiter-engine:${junit5_version}")
+}
+
+test {
+    useJUnitPlatform()
+}
+
+publishing {
+    publications {
+        mavenBinary(MavenPublication) {
+            groupId = project.group
+            artifactId = project.name
+            version = project.version
+
+            from components.java
+        }
+    }
+}

gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,7 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.6-bin.zip
+networkTimeout=10000
+validateDistributionUrl=true
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists

gradlew

@@ -0,0 +1,249 @@
+#!/bin/sh
+
+#
+# Copyright © 2015-2021 the original authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+##############################################################################
+#
+#   Gradle start up script for POSIX generated by Gradle.
+#
+#   Important for running:
+#
+#   (1) You need a POSIX-compliant shell to run this script. If your /bin/sh is
+#       noncompliant, but you have some other compliant shell such as ksh or
+#       bash, then to run this script, type that shell name before the whole
+#       command line, like:
+#
+#           ksh Gradle
+#
+#       Busybox and similar reduced shells will NOT work, because this script
+#       requires all of these POSIX shell features:
+#         * functions;
+#         * expansions «$var», «${var}», «${var:-default}», «${var+SET}»,
+#           «${var#prefix}», «${var%suffix}», and «$( cmd )»;
+#         * compound commands having a testable exit status, especially «case»;
+#         * various built-in commands including «command», «set», and «ulimit».
+#
+#   Important for patching:
+#
+#   (2) This script targets any POSIX shell, so it avoids extensions provided
+#       by Bash, Ksh, etc; in particular arrays are avoided.
+#
+#       The "traditional" practice of packing multiple parameters into a
+#       space-separated string is a well documented source of bugs and security
+#       problems, so this is (mostly) avoided, by progressively accumulating
+#       options in "$@", and eventually passing that to Java.
+#
+#       Where the inherited environment variables (DEFAULT_JVM_OPTS, JAVA_OPTS,
+#       and GRADLE_OPTS) rely on word-splitting, this is performed explicitly;
+#       see the in-line comments for details.
+#
+#       There are tweaks for specific operating systems such as AIX, CygWin,
+#       Darwin, MinGW, and NonStop.
+#
+#   (3) This script is generated from the Groovy template
+#       https://github.com/gradle/gradle/blob/HEAD/subprojects/plugins/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
+#       within the Gradle project.
+#
+#       You can find Gradle at https://github.com/gradle/gradle/.
+#
+##############################################################################
+
+# Attempt to set APP_HOME
+
+# Resolve links: $0 may be a link
+app_path=$0
+
+# Need this for daisy-chained symlinks.
+while
+    APP_HOME=${app_path%"${app_path##*/}"}  # leaves a trailing /; empty if no leading path
+    [ -h "$app_path" ]
+do
+    ls=$( ls -ld "$app_path" )
+    link=${ls#*' -> '}
+    case $link in             #(
+      /*)   app_path=$link ;; #(
+      *)    app_path=$APP_HOME$link ;;
+    esac
+done
+
+# This is normally unused
+# shellcheck disable=SC2034
+APP_BASE_NAME=${0##*/}
+# Discard cd standard output in case $CDPATH is set (https://github.com/gradle/gradle/issues/25036)
+APP_HOME=$( cd "${APP_HOME:-./}" > /dev/null && pwd -P ) || exit
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD=maximum
+
+warn () {
+    echo "$*"
+} >&2
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+} >&2
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "$( uname )" in                #(
+  CYGWIN* )         cygwin=true  ;; #(
+  Darwin* )         darwin=true  ;; #(
+  MSYS* | MINGW* )  msys=true    ;; #(
+  NONSTOP* )        nonstop=true ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD=$JAVA_HOME/jre/sh/java
+    else
+        JAVACMD=$JAVA_HOME/bin/java
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD=java
+    if ! command -v java >/dev/null 2>&1
+    then
+        die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+fi
+
+# Increase the maximum file descriptors if we can.
+if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
+    case $MAX_FD in #(
+      max*)
+        # In POSIX sh, ulimit -H is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC2039,SC3045
+        MAX_FD=$( ulimit -H -n ) ||
+            warn "Could not query maximum file descriptor limit"
+    esac
+    case $MAX_FD in  #(
+      '' | soft) :;; #(
+      *)
+        # In POSIX sh, ulimit -n is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC2039,SC3045
+        ulimit -n "$MAX_FD" ||
+            warn "Could not set maximum file descriptor limit to $MAX_FD"
+    esac
+fi
+
+# Collect all arguments for the java command, stacking in reverse order:
+#   * args from the command line
+#   * the main class name
+#   * -classpath
+#   * -D...appname settings
+#   * --module-path (only if needed)
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables.
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if "$cygwin" || "$msys" ; then
+    APP_HOME=$( cygpath --path --mixed "$APP_HOME" )
+    CLASSPATH=$( cygpath --path --mixed "$CLASSPATH" )
+
+    JAVACMD=$( cygpath --unix "$JAVACMD" )
+
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    for arg do
+        if
+            case $arg in                                #(
+              -*)   false ;;                            # don't mess with options #(
+              /?*)  t=${arg#/} t=/${t%%/*}              # looks like a POSIX filepath
+                    [ -e "$t" ] ;;                      #(
+              *)    false ;;
+            esac
+        then
+            arg=$( cygpath --path --ignore --mixed "$arg" )
+        fi
+        # Roll the args list around exactly as many times as the number of
+        # args, so each arg winds up back in the position where it started, but
+        # possibly modified.
+        #
+        # NB: a `for` loop captures its iteration list before it begins, so
+        # changing the positional parameters here affects neither the number of
+        # iterations, nor the values presented in `arg`.
+        shift                   # remove old arg
+        set -- "$@" "$arg"      # push replacement arg
+    done
+fi
+
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Collect all arguments for the java command:
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, JAVA_OPTS, and optsEnvironmentVar are not allowed to contain shell fragments,
+#     and any embedded shellness will be escaped.
+#   * For example: A user cannot expect ${Hostname} to be expanded, as it is an environment variable and will be
+#     treated as '${Hostname}' itself on the command line.
+
+set -- \
+        "-Dorg.gradle.appname=$APP_BASE_NAME" \
+        -classpath "$CLASSPATH" \
+        org.gradle.wrapper.GradleWrapperMain \
+        "$@"
+
+# Stop when "xargs" is not available.
+if ! command -v xargs >/dev/null 2>&1
+then
+    die "xargs is not available"
+fi
+
+# Use "xargs" to parse quoted args.
+#
+# With -n1 it outputs one arg per line, with the quotes and backslashes removed.
+#
+# In Bash we could simply go:
+#
+#   readarray ARGS < <( xargs -n1 <<<"$var" ) &&
+#   set -- "${ARGS[@]}" "$@"
+#
+# but POSIX shell has neither arrays nor command substitution, so instead we
+# post-process each arg (as a line of input to sed) to backslash-escape any
+# character that might be a shell metacharacter, then use eval to reverse
+# that process (while maintaining the separation between arguments), and wrap
+# the whole thing up as a single "set" statement.
+#
+# This will of course break if any of these variables contains a newline or
+# an unmatched quote.
+#
+
+eval "set -- $(
+        printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" |
+        xargs -n1 |
+        sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' |
+        tr '\n' ' '
+    )" '"$@"'
+
+exec "$JAVACMD" "$@"

gradlew.bat

@@ -0,0 +1,92 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+
+@if "%DEBUG%"=="" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%"=="" set DIRNAME=.
+@rem This is normally unused
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if %ERRORLEVEL% equ 0 goto execute
+
+echo. 1>&2
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 1>&2
+echo. 1>&2
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
+echo location of your Java installation. 1>&2
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto execute
+
+echo. 1>&2
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME% 1>&2
+echo. 1>&2
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
+echo location of your Java installation. 1>&2
+
+goto fail
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %*
+
+:end
+@rem End local scope for the variables with windows NT shell
+if %ERRORLEVEL% equ 0 goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+set EXIT_CODE=%ERRORLEVEL%
+if %EXIT_CODE% equ 0 set EXIT_CODE=1
+if not ""=="%GRADLE_EXIT_CONSOLE%" exit %EXIT_CODE%
+exit /b %EXIT_CODE%
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega

settings.gradle

@@ -0,0 +1,2 @@
+rootProject.name = "xml-element"
+

src/main/java/ru/di9/xml/StringUtils.java

@@ -0,0 +1,7 @@
+package ru.di9.xml;
+
+interface StringUtils {
+    static boolean isEmpty(String string) {
+        return string == null || string.isBlank() || string.isEmpty();
+    }
+}

src/main/java/ru/di9/xml/XmlElement.java

@@ -0,0 +1,87 @@
+package ru.di9.xml;
+
+import it.unimi.dsi.fastutil.ints.IntArrayList;
+import it.unimi.dsi.fastutil.ints.IntList;
+import org.w3c.dom.Element;
+
+import java.util.*;
+import java.util.stream.Collectors;
+
+/**
+ * Враппер над {@link Element org.w3c.dom.Element}
+ */
+public class XmlElement implements Iterable<XmlElement> {
+    private final Element element;
+
+    public XmlElement(Element element) {
+        this.element = element;
+    }
+
+    public String getTagName() {
+        return element.getTagName();
+    }
+
+    public String getValue() {
+        return element.getTextContent();
+    }
+
+    public int getValueAsInt() {
+        var value = element.getTextContent();
+        return StringUtils.isEmpty(value) ? 0 : Integer.parseInt(value);
+    }
+
+    public float getValueAsFloat() {
+        var value = element.getTextContent();
+        return StringUtils.isEmpty(value) ? 0.0f : Float.parseFloat(value);
+    }
+
+    public boolean getValueAsBool() {
+        var value = element.getTextContent();
+        return !StringUtils.isEmpty(value) && Boolean.parseBoolean(value);
+    }
+
+    public List<String> getValueAsListString() {
+        var value = element.getTextContent();
+        return StringUtils.isEmpty(value) ? Collections.emptyList() : Arrays.asList(value.split(","));
+    }
+
+    public IntList getValueAsListInt() {
+        var value = element.getTextContent();
+        return StringUtils.isEmpty(value) ? IntList.of() : Arrays.stream(value.split(","))
+                .map(Integer::parseInt)
+                .collect(Collectors.toCollection(IntArrayList::new));
+    }
+
+    public boolean hasAttribute(String key) {
+        return element.hasAttribute(key);
+    }
+
+    public String getAttribute(String key) {
+        return element.getAttribute(key);
+    }
+
+    public int getAttributeAsInt(String key) {
+        var value = element.getAttribute(key);
+        return StringUtils.isEmpty(value) ? 0 : Integer.parseInt(value);
+    }
+
+    public boolean getAttributeAsBool(String key) {
+        var value = element.getAttribute(key);
+        return !StringUtils.isEmpty(value) && Boolean.parseBoolean(value);
+    }
+
+    @SuppressWarnings("NullableProblems")
+    @Override
+    public Iterator<XmlElement> iterator() {
+        return new XmlElementIterator(element.getChildNodes());
+    }
+
+    public Optional<XmlElement> getFirstElementByTagName(String tagName) {
+        var iterator = new XmlElementIterator(this.element.getElementsByTagName(tagName));
+        if (iterator.hasNext()) {
+            return Optional.of(iterator.next());
+        } else {
+            return Optional.empty();
+        }
+    }
+}

src/main/java/ru/di9/xml/XmlElementIterator.java

@@ -0,0 +1,42 @@
+package ru.di9.xml;
+
+import org.w3c.dom.Node;
+import org.w3c.dom.NodeList;
+
+import java.util.Iterator;
+
+public class XmlElementIterator implements Iterator<XmlElement> {
+    private final NodeList nodeList;
+    private int index = 0;
+    private XmlElement next;
+
+    XmlElementIterator(NodeList nodeList) {
+        this.nodeList = nodeList;
+    }
+
+    @Override
+    public boolean hasNext() {
+        if (index >= nodeList.getLength()) {
+            next = null;
+            return false;
+        }
+
+        Node node;
+        do {
+            node = nodeList.item(index++);
+        } while (index < nodeList.getLength() && node.getNodeType() != Node.ELEMENT_NODE);
+
+        if (node.getNodeType() != Node.ELEMENT_NODE) {
+            next = null;
+            return false;
+        }
+
+        next = new XmlElement((org.w3c.dom.Element) node);
+        return true;
+    }
+
+    @Override
+    public XmlElement next() {
+        return next;
+    }
+}

src/main/java/ru/di9/xml/XmlException.java

@@ -0,0 +1,7 @@
+package ru.di9.xml;
+
+public class XmlException extends RuntimeException {
+    public XmlException(Throwable cause) {
+        super(cause);
+    }
+}

src/main/java/ru/di9/xml/XmlParser.java

@@ -0,0 +1,69 @@
+package ru.di9.xml;
+
+import org.xml.sax.SAXException;
+
+import javax.xml.parsers.DocumentBuilder;
+import javax.xml.parsers.DocumentBuilderFactory;
+import javax.xml.parsers.ParserConfigurationException;
+import java.io.ByteArrayInputStream;
+import java.io.File;
+import java.io.IOException;
+import java.io.InputStream;
+import java.nio.charset.StandardCharsets;
+import java.util.Optional;
+
+public class XmlParser {
+    private final DocumentBuilder documentBuilder;
+
+    public XmlParser() {
+        try {
+            this.documentBuilder = DocumentBuilderFactory.newInstance().newDocumentBuilder();
+        } catch (ParserConfigurationException e) {
+            throw new XmlException(e);
+        }
+    }
+
+    public XmlElement parse(InputStream inputStream) {
+        if (inputStream == null) {
+            return null;
+        }
+
+        try {
+            return new XmlElement(documentBuilder.parse(inputStream).getDocumentElement());
+        } catch (SAXException | IOException e) {
+            throw new XmlException(e);
+        }
+    }
+
+    public XmlElement parse(File file) {
+        if (file == null) {
+            return null;
+        }
+
+        try {
+            return new XmlElement(documentBuilder.parse(file).getDocumentElement());
+        } catch (SAXException | IOException e) {
+            throw new XmlException(e);
+        }
+    }
+
+    public XmlElement parse(String xml) {
+        if (StringUtils.isEmpty(xml)) {
+            return null;
+        }
+
+        return parse(new ByteArrayInputStream(xml.getBytes(StandardCharsets.UTF_8)));
+    }
+
+    public Optional<XmlElement> parseOptional(InputStream inputStream) {
+        return Optional.ofNullable(parse(inputStream));
+    }
+
+    public Optional<XmlElement> parseOptional(File file) {
+        return Optional.ofNullable(parse(file));
+    }
+
+    public Optional<XmlElement> parseOptional(String xml) {
+        return Optional.ofNullable(parse(xml));
+    }
+}

src/test/java/ru/di9/xml/XmlElementTest.java

@@ -0,0 +1,72 @@
+package ru.di9.xml;
+
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+import java.util.Arrays;
+import java.util.Iterator;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+class XmlElementTest {
+    // language=XML
+    final String xml = """
+        <?xml version="1.0" encoding="UTF-8"?>
+        <root>
+            <!-- Комментарий -->
+            <node_str attr="VA-123">some value</node_str>
+            <node_int attr="24">99</node_int>
+            <node_bool attr="false">true</node_bool>
+            <empty/>
+            <node_str_commented>
+                <!-- comment -->
+                content
+            </node_str_commented>
+        </root>
+        """;
+
+    XmlElement rootElement;
+
+    @BeforeEach
+    void setup() {
+        rootElement = new XmlParser().parse(xml);
+        assertNotNull(rootElement);
+        assertEquals("root", rootElement.getTagName());
+    }
+
+    @Test
+    void testIterator() {
+        Iterator<XmlElement> iteratorElement = rootElement.iterator();
+        Iterator<String> iteratorTagName = Arrays.asList("node_str", "node_int", "node_bool", "empty").iterator();
+        Iterator<Object> iteratorAttribute = Arrays.asList(new Object[]{"VA-123", 24, false, null}).iterator();
+
+        while (iteratorElement.hasNext() && iteratorTagName.hasNext() && iteratorAttribute.hasNext()) {
+            var element = iteratorElement.next();
+            var tagName = iteratorTagName.next();
+            var attr = iteratorAttribute.next();
+
+            assertEquals(tagName, element.getTagName());
+            switch (element.getTagName()) {
+                case "node_str" -> assertEquals(attr, element.getAttribute("attr"));
+                case "node_int" -> assertEquals(attr, element.getAttributeAsInt("attr"));
+                case "node_bool" -> assertEquals(attr, element.getAttributeAsBool("attr"));
+                case "empty" -> {
+                    assertTrue(StringUtils.isEmpty(element.getValue()));
+                    assertFalse(element.hasAttribute("attr"));
+                    assertTrue(StringUtils.isEmpty(element.getAttribute("attr")));
+                }
+                default -> fail("Unknown tag '%s'".formatted(element.getTagName()));
+            }
+        }
+    }
+
+    @Test
+    void testCommentedContent() {
+        var optElement = rootElement.getFirstElementByTagName("node_str_commented");
+        assertNotNull(optElement);
+        assertTrue(optElement.isPresent());
+
+        var element = optElement.get();
+        assertEquals("content", element.getValue().trim());
+    }
+}