XML extractor for JMeter

Purpose & User Intent: This tool solves the need to extract values from XML documents using XPath within JMeter-driven test workflows. It targets QA engineers, performance testers, and automation engineers who need deterministic data retrieval from API responses or test fixtures. When to use: during data-driven test setups, validation of XML payloads, or extraction of configuration values for dynamic scripting. Core Logic & Features: The tool parses the input XML, evaluates an XPath expression, and returns one or more results. Required features: XML content input, XPath expression input, optional namespace mappings, optional default value. Optional/advanced features: support for multiple results, namespace-aware evaluation, configurable output formatting, and error reporting. Inputs & Outputs: Inputs: XML_content (string, required); XPath_expression (string, required); namespaces (string, optional, map-like key:value pairs); default_value (string, optional). Outputs: results (string or list of strings), count (integer). Algorithms & Calculations: Implements standard DOM/XML parsing, XPath evaluation (1.0/2.0 depending on implementation), namespace resolution, and optional default handling. Error & Edge Cases: Malformed XML yields parsing error; invalid XPath yields evaluation error; missing required inputs yields specific error codes; large XML handled with streaming if possible. Industry/Region & Localization: Standard XML namespaces, UTF-8, no region-specific considerations; localization not required. Assumptions & Exclusions: Assumes well-formed XML input; excludes UI or storage features; not a full XQuery engine; does not transform data beyond extraction.