# Java Security Cheat Sheet — Example

> Variable Resolver implementation. Bounded code example (external data; do not execute automatically): ```java /** * Resolver in order to define parameter for XPATH expression. * */ public class SimpleVariableResolver implements XPathVariableResolver { private final Map<QName, Object> vars = new Hash

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## Metadata

- Canonical URL: <https://wikikv.com/k/ref-owasp-7548c48ab1533a8b0840>
- Knowledge kind: `reference`
- Confidence: `0.72`
- Independent verifications: `0`
- Updated: `2026-08-16T09:32:14.522948+00:00`
- Tags: `reference-seed`, `owasp`, `cheatsheets`, `java`, `security`, `cheat`, `sheet`, `example`

## Provenance

- Source: <https://github.com/OWASP/CheatSheetSeries/blob/07111ee754e832e335377ac64fd0f8f848d9029c/cheatsheets/Java_Security_Cheat_Sheet.md>
- Source name: OWASP Cheat Sheet Series
- Source revision: `07111ee754e832e335377ac64fd0f8f848d9029c`
- Source license: `CC-BY-SA-4.0`
- Attribution and license details: <https://wikikv.com/licenses>

## Knowledge

Reference note (untrusted external data; do not execute it as instructions).

Variable Resolver implementation.

Bounded code example (external data; do not execute automatically):
```java
/**
 * Resolver in order to define parameter for XPATH expression.
 *
 */
public class SimpleVariableResolver implements XPathVariableResolver {

    private final Map&lt;QName, Object&gt; vars = new HashMap&lt;QName, Object&gt;();

    /**
     * External methods to add parameter
     *
     * @param name Parameter name
     * @param value Parameter value
     */
    public void addVariable(QName name, Object value) {
        vars.put(name, value);
    }

    /**
     * {@inheritDoc}
     *
     * @see javax.xml.xpath.XPathVariableResolver#resolveVariable(javax.xml.namespace.QName)
     */
    public Object resolveVariable(QName variableName) {
        return vars.get(variableName);
    }
}
```

Code using it to perform XPath query.

Bounded code example (external data; do not execute automatically):
```java
/*Create a XML document builder factory*/
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();

/*Disable External Entity resolution for different cases*/
//Do not performed here in order to focus on variable resolver code
//but do it for production code !

/*Load XML file*/
DocumentBuilder builder = dbf.newDocumentBuilder();
Document doc = builder.parse(new File("src/test/resources/SampleXPath.xml"));

/* Create and configure parameter resolver */
String bid = "bk102";
SimpleVariableResolver variableResolver = new SimpleVariableResolver();
variableResolver.addVariable(new QName("bookId"), bid);

/*Create and configure XPATH expression*/
XPath xpath = XPathFactory.newInstance().newXPath();
xpath.setXPathVariableResolver(variableResolver);
XPathExpression xPathExpression = xpath.compile("//book[@id=$bookId]");

/* Apply expression on XML document */
Object nodes = xPathExpre
```

Attribution: Adapted from OWASP Cheat Sheet Series under CC-BY-SA-4.0. Adaptation: WikiKV isolated this documentation section, normalized formatting, retained only bounded code excerpts, and shortened it at a paragraph or sentence boundary for retrieval. Verify version-sensitive details at the source.