/*
|
* CDDL HEADER START
|
*
|
* The contents of this file are subject to the terms of the
|
* Common Development and Distribution License, Version 1.0 only
|
* (the "License"). You may not use this file except in compliance
|
* with the License.
|
*
|
* You can obtain a copy of the license at legal-notices/CDDLv1_0.txt
|
* or http://forgerock.org/license/CDDLv1.0.html.
|
* See the License for the specific language governing permissions
|
* and limitations under the License.
|
*
|
* When distributing Covered Code, include this CDDL HEADER in each
|
* file and include the License file at legal-notices/CDDLv1_0.txt.
|
* If applicable, add the following below this CDDL HEADER, with the
|
* fields enclosed by brackets "[]" replaced with your own identifying
|
* information:
|
* Portions Copyright [yyyy] [name of copyright owner]
|
*
|
* CDDL HEADER END
|
*
|
*
|
* Copyright 2006-2008 Sun Microsystems, Inc.
|
* Portions copyright 2012 ForgeRock AS.
|
*/
|
|
package org.forgerock.opendj.asn1;
|
|
import static org.forgerock.opendj.ldap.CoreMessages.ERR_ASN1_UNEXPECTED_TAG;
|
|
import java.io.IOException;
|
|
import org.forgerock.i18n.LocalizableMessage;
|
import org.forgerock.opendj.ldap.ByteString;
|
import org.forgerock.opendj.ldap.ByteStringBuilder;
|
import org.forgerock.opendj.ldap.DecodeException;
|
|
/**
|
* An abstract {@code ASN1Reader} which can be used as the basis for
|
* implementing new ASN1 reader implementations.
|
*/
|
public abstract class AbstractASN1Reader implements ASN1Reader {
|
/**
|
* Creates a new abstract ASN.1 reader.
|
*/
|
protected AbstractASN1Reader() {
|
// No implementation required.
|
}
|
|
/**
|
* {@inheritDoc}
|
*/
|
public boolean readBoolean(byte type) throws IOException {
|
if (type == 0x00) {
|
type = ASN1.UNIVERSAL_BOOLEAN_TYPE;
|
}
|
checkType(type);
|
return readBoolean();
|
}
|
|
/**
|
* {@inheritDoc}
|
*/
|
public int readEnumerated(byte type) throws IOException {
|
if (type == 0x00) {
|
type = ASN1.UNIVERSAL_ENUMERATED_TYPE;
|
}
|
checkType(type);
|
return readEnumerated();
|
}
|
|
/**
|
* {@inheritDoc}
|
*/
|
public long readInteger(byte type) throws IOException {
|
if (type == 0x00) {
|
type = ASN1.UNIVERSAL_INTEGER_TYPE;
|
}
|
checkType(type);
|
return readInteger();
|
}
|
|
/**
|
* {@inheritDoc}
|
*/
|
public void readNull(byte type) throws IOException {
|
if (type == 0x00) {
|
type = ASN1.UNIVERSAL_NULL_TYPE;
|
}
|
checkType(type);
|
readNull();
|
}
|
|
/**
|
* {@inheritDoc}
|
*/
|
public ByteString readOctetString(byte type) throws IOException {
|
if (type == 0x00) {
|
type = ASN1.UNIVERSAL_OCTET_STRING_TYPE;
|
}
|
checkType(type);
|
return readOctetString();
|
}
|
|
/**
|
* {@inheritDoc}
|
*/
|
public ByteStringBuilder readOctetString(byte type, final ByteStringBuilder builder)
|
throws IOException {
|
if (type == 0x00) {
|
type = ASN1.UNIVERSAL_OCTET_STRING_TYPE;
|
}
|
checkType(type);
|
readOctetString(builder);
|
return builder;
|
}
|
|
/**
|
* {@inheritDoc}
|
*/
|
public String readOctetStringAsString(byte type) throws IOException {
|
// We could cache the UTF-8 CharSet if performance proves to be an
|
// issue.
|
if (type == 0x00) {
|
type = ASN1.UNIVERSAL_OCTET_STRING_TYPE;
|
}
|
checkType(type);
|
return readOctetStringAsString();
|
}
|
|
/**
|
* {@inheritDoc}
|
*/
|
public void readStartSequence(byte type) throws IOException {
|
if (type == 0x00) {
|
type = ASN1.UNIVERSAL_SEQUENCE_TYPE;
|
}
|
checkType(type);
|
readStartSequence();
|
}
|
|
/**
|
* {@inheritDoc}
|
*/
|
public void readStartSet(byte type) throws IOException {
|
// From an implementation point of view, a set is equivalent to a
|
// sequence.
|
if (type == 0x00) {
|
type = ASN1.UNIVERSAL_SET_TYPE;
|
}
|
checkType(type);
|
readStartSet();
|
}
|
|
private void checkType(final byte expectedType) throws IOException {
|
if (peekType() != expectedType) {
|
final LocalizableMessage message =
|
ERR_ASN1_UNEXPECTED_TAG.get(expectedType, peekType());
|
throw DecodeException.fatalError(message);
|
}
|
}
|
}
|
