com.mobius.software.telco.protocols.ss7.asn.primitives.ASNOctetString Maven / Gradle / Ivy

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package com.mobius.software.telco.protocols.ss7.asn.primitives;

import java.util.concurrent.ConcurrentHashMap;

import com.mobius.software.telco.protocols.ss7.asn.ASNClass;
import com.mobius.software.telco.protocols.ss7.asn.ASNParser;
import com.mobius.software.telco.protocols.ss7.asn.annotations.ASNDecode;
import com.mobius.software.telco.protocols.ss7.asn.annotations.ASNEncode;
import com.mobius.software.telco.protocols.ss7.asn.annotations.ASNLength;
import com.mobius.software.telco.protocols.ss7.asn.annotations.ASNTag;
import com.mobius.software.telco.protocols.ss7.asn.annotations.ASNValidate;
import com.mobius.software.telco.protocols.ss7.asn.exceptions.ASNParsingComponentException;
import com.mobius.software.telco.protocols.ss7.asn.exceptions.ASNParsingComponentExceptionReason;

/*
 * Mobius Software LTD
 * Copyright 2019, Mobius Software LTD and individual contributors
 * by the @authors tag.
 *
 * This program is free software: you can redistribute it and/or modify
 * under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation; either version 3 of
 * the License, or (at your option) any later version.
 *
 * This program 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
 * G-NU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see 
 */

/**
*
* @author yulian oifa
*
*/

import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;

@ASNTag(asnClass=ASNClass.UNIVERSAL,tag=4,constructed=false,lengthIndefinite=false)
public class ASNOctetString {
	private ByteBuf value;
	private String name;
	private Integer minLength;
	private Integer maxLength;
	private Boolean isRoot;
	
	//required for parser
	public ASNOctetString() {
		
	}
	
	public ASNOctetString(String name,Integer minLength,Integer maxLength,Boolean isRoot) {
		this.name = name;
		this.minLength = minLength;
		this.maxLength = maxLength;
		this.isRoot = isRoot;
	}
	
	public ASNOctetString(ByteBuf value,String name,Integer minLength,Integer maxLength,Boolean isRoot) {		
		if(value!=null)
			this.value = Unpooled.wrappedBuffer(value);
		else
			this.value = null;
		
		this.name = name;
		this.minLength = minLength;
		this.maxLength = maxLength;
		this.isRoot = isRoot;
	}
	
	public ByteBuf getValue() {
		if(value==null)
			return Unpooled.EMPTY_BUFFER;
		
		return Unpooled.wrappedBuffer(value);
	}
	
	@ASNLength
	public Integer getLength(ASNParser parser) {
		return getLength(getValue());
	}
	
	@ASNEncode
	public void encode(ASNParser parser,ByteBuf buffer) {
		if(value!=null)
			buffer.writeBytes(getValue());
	}
	
	@ASNDecode
	public Boolean decode(ASNParser parser,Object parent,ByteBuf buffer,ConcurrentHashMap mappedData,Boolean skipErrors) {
		if(buffer.readableBytes()>0)
			value=Unpooled.wrappedBuffer(buffer);
		else
			value=Unpooled.EMPTY_BUFFER;
		
		return false;
	}
	
	@ASNValidate
	public void validateElement() throws ASNParsingComponentException {
		if(minLength!=null && value==null) {
			if(isRoot==null || !isRoot)
				throw new ASNParsingComponentException(name + " is required",ASNParsingComponentExceptionReason.MistypedParameter);
			else
				throw new ASNParsingComponentException(name + " is required",ASNParsingComponentExceptionReason.MistypedRootParameter);
		} else if(minLength!=null && value!=null && value.readableBytes()maxLength){
			if(isRoot==null || !isRoot)
				throw new ASNParsingComponentException(name + " length should be at most " + maxLength,ASNParsingComponentExceptionReason.MistypedParameter);
			else
				throw new ASNParsingComponentException(name + " length should be at most " + maxLength,ASNParsingComponentExceptionReason.MistypedRootParameter);
		} 
			
	}
	
	public static int getLength(ByteBuf value)
	{		
		if(value==null)
			return 0;
		
		return value.readableBytes();
	}
	
	public String printDataArr() {
        StringBuilder sb = new StringBuilder();
        boolean first = true;
        ByteBuf buffer=getValue();
        if (buffer != null) {
            while(buffer.readableBytes()>0) {
            	byte b=buffer.readByte();
                if (first)
                    first = false;
                else
                    sb.append(", ");
                
                if((b & 0xFF)<=127)
                	sb.append(b & 0xFF);
                else
                	sb.append("-").append(256 - b & 0xFF);
            }
        }

        return sb.toString();
    }
	
	public static String printDataArr(ByteBuf buffer) {
        StringBuilder sb = new StringBuilder();
        boolean first = true;
        if (buffer != null) {
            while(buffer.readableBytes()>0) {
            	byte b=buffer.readByte();
                if (first)
                    first = false;
                else
                    sb.append(", ");
                
                if((b & 0xFF)<=127)
                	sb.append(b & 0xFF);
                else
                	sb.append("-").append(256 - b & 0xFF);
            }
        }

        return sb.toString();
    }
}