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	/*
	* reserved comment block
	* DO NOT REMOVE OR ALTER!
	*/
	/**
	* Licensed to the Apache Software Foundation (ASF) under one
	* or more contributor license agreements. See the NOTICE file
	* distributed with this work for additional information
	* regarding copyright ownership. The ASF licenses this file
	* to you 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
	*
	* http://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.
	*/
	/*
	* Copyright (c) 2005, 2018, Oracle and/or its affiliates. All rights reserved.
	*/
	/*
	* $Id: DOMSignatureProperty.java 1788465 2017-03-24 15:10:51Z coheigea $
	*/
	package org.jcp.xml.dsig.internal.dom;

	import javax.xml.crypto.*;
	import javax.xml.crypto.dsig.*;

	import java.util.*;

	import org.w3c.dom.Element;
	import org.w3c.dom.Node;

	/**
	* DOM-based implementation of SignatureProperty.
	*
	*/
	public final class DOMSignatureProperty extends BaseStructure
	implements SignatureProperty {

	private final String id;
	private final String target;
	private final List<XMLStructure> content;

	/**
	* Creates a {@code SignatureProperty} from the specified parameters.
	*
	* @param content a list of one or more {@link XMLStructure}s. The list
	* is defensively copied to protect against subsequent modification.
	* @param target the target URI
	* @param id the Id (may be {@code null})
	* @throws ClassCastException if {@code content} contains any
	* entries that are not of type {@link XMLStructure}
	* @throws IllegalArgumentException if {@code content} is empty
	* @throws NullPointerException if {@code content} or
	* {@code target} is {@code null}
	*/
	public DOMSignatureProperty(List<? extends XMLStructure> content,
	String target, String id)
	{
	if (target == null) {
	throw new NullPointerException("target cannot be null");
	} else if (content == null) {
	throw new NullPointerException("content cannot be null");
	} else if (content.isEmpty()) {
	throw new IllegalArgumentException("content cannot be empty");
	} else {
	this.content = Collections.unmodifiableList(
	new ArrayList<>(content));
	for (int i = 0, size = this.content.size(); i < size; i++) {
	if (!(this.content.get(i) instanceof XMLStructure)) {
	throw new ClassCastException
	("content["+i+"] is not a valid type");
	}
	}
	}
	this.target = target;
	this.id = id;
	}

	/**
	* Creates a {@code DOMSignatureProperty} from an element.
	*
	* @param propElem a SignatureProperty element
	*/
	public DOMSignatureProperty(Element propElem)
	throws MarshalException
	{
	// unmarshal attributes
	target = DOMUtils.getAttributeValue(propElem, "Target");
	if (target == null) {
	throw new MarshalException("target cannot be null");
	}
	id = DOMUtils.getIdAttributeValue(propElem, "Id");

	List<XMLStructure> newContent = new ArrayList<>();
	Node firstChild = propElem.getFirstChild();
	while (firstChild != null) {
	newContent.add(new javax.xml.crypto.dom.DOMStructure(firstChild));
	firstChild = firstChild.getNextSibling();
	}
	if (newContent.isEmpty()) {
	throw new MarshalException("content cannot be empty");
	} else {
	this.content = Collections.unmodifiableList(newContent);
	}
	}

	@Override
	public List<XMLStructure> getContent() {
	return content;
	}

	@Override
	public String getId() {
	return id;
	}

	@Override
	public String getTarget() {
	return target;
	}

	public static void marshal(XmlWriter xwriter, SignatureProperty sigProp, String dsPrefix, XMLCryptoContext context)
	throws MarshalException
	{
	xwriter.writeStartElement(dsPrefix, "SignatureProperty", XMLSignature.XMLNS);

	// set attributes
	xwriter.writeIdAttribute("", "", "Id", sigProp.getId());
	xwriter.writeAttribute("", "", "Target", sigProp.getTarget());

	// create and append any elements and mixed content
	List<XMLStructure> content = getContent(sigProp);
	for (XMLStructure property : content) {
	xwriter.marshalStructure(property, dsPrefix, context);
	}

	xwriter.writeEndElement(); // "SignatureProperty"
	}

	@Override
	public boolean equals(Object o) {
	if (this == o) {
	return true;
	}

	if (!(o instanceof SignatureProperty)) {
	return false;
	}
	SignatureProperty osp = (SignatureProperty)o;

	boolean idsEqual = id == null ? osp.getId() == null
	: id.equals(osp.getId());

	@SuppressWarnings("unchecked")
	List<XMLStructure> ospContent = osp.getContent();
	return equalsContent(ospContent) &&
	target.equals(osp.getTarget()) && idsEqual;
	}

	@Override
	public int hashCode() {
	int result = 17;
	if (id != null) {
	result = 31 * result + id.hashCode();
	}
	result = 31 * result + target.hashCode();
	result = 31 * result + content.hashCode();

	return result;
	}

	@SuppressWarnings("unchecked")
	private static List<XMLStructure> getContent(SignatureProperty prop) {
	return prop.getContent();
	}
	private boolean equalsContent(List<XMLStructure> otherContent) {
	int osize = otherContent.size();
	if (content.size() != osize) {
	return false;
	}
	for (int i = 0; i < osize; i++) {
	XMLStructure oxs = otherContent.get(i);
	XMLStructure xs = content.get(i);
	if (oxs instanceof javax.xml.crypto.dom.DOMStructure) {
	if (!(xs instanceof javax.xml.crypto.dom.DOMStructure)) {
	return false;
	}
	Node onode = ((javax.xml.crypto.dom.DOMStructure)oxs).getNode();
	Node node = ((javax.xml.crypto.dom.DOMStructure)xs).getNode();
	if (!DOMUtils.nodesEqual(node, onode)) {
	return false;
	}
	} else {
	if (!(xs.equals(oxs))) {
	return false;
	}
	}
	}

	return true;
	}
	}

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