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package org.apache.tomcat.util.digester;
import org.xml.sax.Attributes;
/**
* Rule implementation that saves a parameter containing the
* Digester
matching path for use by a surrounding
* CallMethodRule
. This Rule is most useful when making
* extensive use of wildcards in rule patterns.
*
* @since 1.6
*/
public class PathCallParamRule extends Rule {
// ----------------------------------------------------------- Constructors
/**
* Construct a "call parameter" rule that will save the body text of this
* element as the parameter value.
*
* @param paramIndex The zero-relative parameter number
*/
public PathCallParamRule(int paramIndex) {
this.paramIndex = paramIndex;
}
// ----------------------------------------------------- Instance Variables
/**
* The zero-relative index of the parameter we are saving.
*/
protected int paramIndex = 0;
// --------------------------------------------------------- Public Methods
/**
* Process the start of this element.
*
* @param namespace the namespace URI of the matching element, or an
* empty string if the parser is not namespace aware or the element has
* no namespace
* @param name the local name if the parser is namespace aware, or just
* the element name otherwise
* @param attributes The attribute list for this element
*/
public void begin(String namespace, String name, Attributes attributes) throws Exception {
String param = getDigester().getMatch();
if(param != null) {
Object parameters[] = (Object[]) digester.peekParams();
parameters[paramIndex] = param;
}
}
/**
* Render a printable version of this Rule.
*/
public String toString() {
StringBuilder sb = new StringBuilder("PathCallParamRule[");
sb.append("paramIndex=");
sb.append(paramIndex);
sb.append("]");
return (sb.toString());
}
}
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