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	/*
	* Copyright (c) 1997, 2004, Oracle and/or its affiliates. All rights reserved.
	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
	*
	* This code is free software; you can redistribute it and/or modify it
	* under the terms of the GNU General Public License version 2 only, as
	* published by the Free Software Foundation. Oracle designates this
	* particular file as subject to the "Classpath" exception as provided
	* by Oracle in the LICENSE file that accompanied this code.
	*
	* This code is distributed in the hope that it will be useful, but WITHOUT
	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
	* version 2 for more details (a copy is included in the LICENSE file that
	* accompanied this code).
	*
	* You should have received a copy of the GNU General Public License version
	* 2 along with this work; if not, write to the Free Software Foundation,
	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
	*
	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
	* or visit www.oracle.com if you need additional information or have any
	* questions.
	*/

	package sun.security.x509;

	import java.io.IOException;
	import sun.security.util.*;

	/**
	* This class defines the EDIPartyName of the GeneralName choice.
	* The ASN.1 syntax for this is:
	* <pre>
	* EDIPartyName ::= SEQUENCE {
	* nameAssigner [0] DirectoryString OPTIONAL,
	* partyName [1] DirectoryString }
	* </pre>
	*
	* @author Hemma Prafullchandra
	* @see GeneralName
	* @see GeneralNames
	* @see GeneralNameInterface
	*/
	public class EDIPartyName implements GeneralNameInterface {

	// Private data members
	private static final byte TAG_ASSIGNER = 0;
	private static final byte TAG_PARTYNAME = 1;

	private String assigner = null;
	private String party = null;

	private int myhash = -1;

	/**
	* Create the EDIPartyName object from the specified names.
	*
	* @param assignerName the name of the assigner
	* @param partyName the name of the EDI party.
	*/
	public EDIPartyName(String assignerName, String partyName) {
	this.assigner = assignerName;
	this.party = partyName;
	}

	/**
	* Create the EDIPartyName object from the specified name.
	*
	* @param partyName the name of the EDI party.
	*/
	public EDIPartyName(String partyName) {
	this.party = partyName;
	}

	/**
	* Create the EDIPartyName object from the passed encoded Der value.
	*
	* @param derValue the encoded DER EDIPartyName.
	* @exception IOException on error.
	*/
	public EDIPartyName(DerValue derValue) throws IOException {
	DerInputStream in = new DerInputStream(derValue.toByteArray());
	DerValue[] seq = in.getSequence(2);

	int len = seq.length;
	if (len < 1 \|\| len > 2)
	throw new IOException("Invalid encoding of EDIPartyName");

	for (int i = 0; i < len; i++) {
	DerValue opt = seq[i];
	if (opt.isContextSpecific(TAG_ASSIGNER) &&
	!opt.isConstructed()) {
	if (assigner != null)
	throw new IOException("Duplicate nameAssigner found in"
	+ " EDIPartyName");
	opt = opt.data.getDerValue();
	assigner = opt.getAsString();
	}
	if (opt.isContextSpecific(TAG_PARTYNAME) &&
	!opt.isConstructed()) {
	if (party != null)
	throw new IOException("Duplicate partyName found in"
	+ " EDIPartyName");
	opt = opt.data.getDerValue();
	party = opt.getAsString();
	}
	}
	}

	/**
	* Return the type of the GeneralName.
	*/
	public int getType() {
	return (GeneralNameInterface.NAME_EDI);
	}

	/**
	* Encode the EDI party name into the DerOutputStream.
	*
	* @param out the DER stream to encode the EDIPartyName to.
	* @exception IOException on encoding errors.
	*/
	public void encode(DerOutputStream out) throws IOException {
	DerOutputStream tagged = new DerOutputStream();
	DerOutputStream tmp = new DerOutputStream();

	if (assigner != null) {
	DerOutputStream tmp2 = new DerOutputStream();
	// XXX - shd check is chars fit into PrintableString
	tmp2.putPrintableString(assigner);
	tagged.write(DerValue.createTag(DerValue.TAG_CONTEXT,
	false, TAG_ASSIGNER), tmp2);
	}
	if (party == null)
	throw new IOException("Cannot have null partyName");

	// XXX - shd check is chars fit into PrintableString
	tmp.putPrintableString(party);
	tagged.write(DerValue.createTag(DerValue.TAG_CONTEXT,
	false, TAG_PARTYNAME), tmp);

	out.write(DerValue.tag_Sequence, tagged);
	}

	/**
	* Return the assignerName
	*
	* @returns String assignerName
	*/
	public String getAssignerName() {
	return assigner;
	}

	/**
	* Return the partyName
	*
	* @returns String partyName
	*/
	public String getPartyName() {
	return party;
	}

	/**
	* Compare this EDIPartyName with another. Does a byte-string
	* comparison without regard to type of the partyName and
	* the assignerName.
	*
	* @returns true if the two names match
	*/
	public boolean equals(Object other) {
	if (!(other instanceof EDIPartyName))
	return false;
	String otherAssigner = ((EDIPartyName)other).assigner;
	if (this.assigner == null) {
	if (otherAssigner != null)
	return false;
	} else {
	if (!(this.assigner.equals(otherAssigner)))
	return false;
	}
	String otherParty = ((EDIPartyName)other).party;
	if (this.party == null) {
	if (otherParty != null)
	return false;
	} else {
	if (!(this.party.equals(otherParty)))
	return false;
	}
	return true;
	}

	/**
	* Returns the hash code value for this EDIPartyName.
	*
	* @return a hash code value.
	*/
	public int hashCode() {
	if (myhash == -1) {
	myhash = 37 + (party == null ? 1 : party.hashCode());
	if (assigner != null) {
	myhash = 37 * myhash + assigner.hashCode();
	}
	}
	return myhash;
	}

	/**
	* Return the printable string.
	*/
	public String toString() {
	return ("EDIPartyName: " +
	((assigner == null) ? "" :
	(" nameAssigner = " + assigner + ","))
	+ " partyName = " + party);
	}

	/**
	* Return constraint type:<ul>
	* <li>NAME_DIFF_TYPE = -1: input name is different type from name (i.e. does not constrain)
	* <li>NAME_MATCH = 0: input name matches name
	* <li>NAME_NARROWS = 1: input name narrows name
	* <li>NAME_WIDENS = 2: input name widens name
	* <li>NAME_SAME_TYPE = 3: input name does not match or narrow name, but is same type
	* </ul>. These results are used in checking NameConstraints during
	* certification path verification.
	*
	* @param inputName to be checked for being constrained
	* @returns constraint type above
	* @throws UnsupportedOperationException if name is same type, but comparison operations are
	* not supported for this name type.
	*/
	public int constrains(GeneralNameInterface inputName) throws UnsupportedOperationException {
	int constraintType;
	if (inputName == null)
	constraintType = NAME_DIFF_TYPE;
	else if (inputName.getType() != NAME_EDI)
	constraintType = NAME_DIFF_TYPE;
	else {
	throw new UnsupportedOperationException("Narrowing, widening, and matching of names not supported for EDIPartyName");
	}
	return constraintType;
	}

	/**
	* Return subtree depth of this name for purposes of determining
	* NameConstraints minimum and maximum bounds and for calculating
	* path lengths in name subtrees.
	*
	* @returns distance of name from root
	* @throws UnsupportedOperationException if not supported for this name type
	*/
	public int subtreeDepth() throws UnsupportedOperationException {
	throw new UnsupportedOperationException("subtreeDepth() not supported for EDIPartyName");
	}

	}

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