Smack/smack-extensions/src/main/java/org/jivesoftware/smackx/bob/BoBHash.java

122 lines
3.0 KiB
Java

/**
*
* Copyright 2016-2017 Fernando Ramirez, Florian Schmaus
*
* Licensed 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.
*/
package org.jivesoftware.smackx.bob;
import org.jivesoftware.smack.util.StringUtils;
/**
* Bits of Binary hash class.
*
* @author Fernando Ramirez
* @author Florian Schmaus
* @see <a href="http://xmpp.org/extensions/xep-0231.html">XEP-0231: Bits of
* Binary</a>
*/
public class BoBHash {
private final String hash;
private final String hashType;
private final String cid;
/**
* BoB hash constructor.
*
* @param hash
* @param hashType
*/
public BoBHash(String hash, String hashType) {
this.hash = StringUtils.requireNotNullNorEmpty(hash, "hash must not be null nor empty");
this.hashType = StringUtils.requireNotNullNorEmpty(hashType, "hashType must not be null nor empty");
this.cid = this.hashType + '+' + this.hash + "@bob.xmpp.org";
}
/**
* Get the hash.
*
* @return the hash
*/
public String getHash() {
return hash;
}
/**
* Get the hash type.
*
* @return the hash type
*/
public String getHashType() {
return hashType;
}
/**
* BoB hash to src attribute string.
*
* @return src attribute string
*/
public String toSrc() {
return "cid:" + getCid();
}
/**
* BoB hash to cid attribute string.
*
* @return cid attribute string
*/
public String getCid() {
return cid;
}
@Override
public boolean equals(Object other) {
if (other instanceof BoBHash) {
BoBHash otherBob = (BoBHash) other;
return cid.equals(otherBob.cid);
}
return false;
}
@Override
public int hashCode() {
return cid.hashCode();
}
/**
* Get BoB hash from src attribute string.
*
* @param src
* @return the BoB hash
*/
public static BoBHash fromSrc(String src) {
String hashType = src.substring(src.lastIndexOf("cid:") + 4, src.indexOf("+"));
String hash = src.substring(src.indexOf("+") + 1, src.indexOf("@bob.xmpp.org"));
return new BoBHash(hash, hashType);
}
/**
* Get BoB hash from cid attribute string.
*
* @param cid
* @return the BoB hash
*/
public static BoBHash fromCid(String cid) {
String hashType = cid.substring(0, cid.indexOf("+"));
String hash = cid.substring(cid.indexOf("+") + 1, cid.indexOf("@bob.xmpp.org"));
return new BoBHash(hash, hashType);
}
}