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/*
 * $Id: XPathFilter2ParameterSpec.java,v 1.7 2005/05/13 18:45:42 mullan Exp $
 */
package javax.xml.crypto.dsig.spec;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import javax.xml.crypto.dsig.Transform;


Parameters for the W3C Recommendation

XPath Filter 2.0 Transform Algorithm. The parameters include a list of one or more XPathType objects. 
Author:Sean Mullan, JSR 105 Expert Group
See Also:
Since:1.6
/**
 * Parameters for the W3C Recommendation
 * <a href="http://www.w3.org/TR/xmldsig-filter2/">
 * XPath Filter 2.0 Transform Algorithm</a>.
 * The parameters include a list of one or more {@link XPathType} objects.
 *
 * @author Sean Mullan
 * @author JSR 105 Expert Group
 * @since 1.6
 * @see Transform
 * @see XPathFilterParameterSpec
 */
public final class XPathFilter2ParameterSpec implements TransformParameterSpec {

    private final List<XPathType> xPathList;

    
Creates an XPathFilter2ParameterSpec.

Params:
  • xPathList – a list of one or more XPathType objects. The list is defensively copied to protect against subsequent modification.
Throws:
/**
     * Creates an <code>XPathFilter2ParameterSpec</code>.
     *
     * @param xPathList a list of one or more {@link XPathType} objects. The
     *    list is defensively copied to protect against subsequent modification.
     * @throws ClassCastException if <code>xPathList</code> contains any
     *    entries that are not of type {@link XPathType}
     * @throws IllegalArgumentException if <code>xPathList</code> is empty
     * @throws NullPointerException if <code>xPathList</code> is
     *    <code>null</code>
     */
    public XPathFilter2ParameterSpec(List<XPathType> xPathList) {
        if (xPathList == null) {
            throw new NullPointerException("xPathList cannot be null");
        }
        List<XPathType> tempList =
            Collections.checkedList(new ArrayList<XPathType>(),
                                    XPathType.class);
        tempList.addAll(xPathList);
        if (tempList.isEmpty()) {
            throw new IllegalArgumentException("xPathList cannot be empty");
        }
        this.xPathList = Collections.unmodifiableList(tempList);
    }

    
Returns a list of one or more XPathType objects. 
 This implementation returns an 
unmodifiable list. 
Returns:a List of XPathType objects
   (never null or empty)
/**
     * Returns a list of one or more {@link XPathType} objects.
     * <p>
     * This implementation returns an {@link Collections#unmodifiableList
     * unmodifiable list}.
     *
     * @return a <code>List</code> of <code>XPathType</code> objects
     *    (never <code>null</code> or empty)
     */
    public List<XPathType> getXPathList() {
        return xPathList;
    }
}