package org.ethereum.net.eth;
import java.util.ArrayList;
import java.util.List;
import java.util.Vector;
import org.ethereum.core.Block;
import org.ethereum.util.RLP;
import org.ethereum.util.RLPList;
import static org.ethereum.net.eth.EthMessageCodes.BLOCKS;
/**
* Wrapper around an Ethereum Blocks message on the network
*
* @see org.ethereum.net.eth.EthMessageCodes#BLOCKS
*/
public class BlocksMessage extends EthMessage {
private List<Block> blocks;
public BlocksMessage(byte[] encoded) {
super(encoded);
}
public BlocksMessage(List<Block> blocks){
this.blocks = blocks;
parsed = true;
}
private void parse() {
RLPList paramsList = (RLPList) RLP.decode2(encoded).get(0);
blocks = new ArrayList<>();
for (int i = 1; i < paramsList.size(); ++i) {
RLPList rlpData = ((RLPList) paramsList.get(i));
Block blockData = new Block(rlpData.getRLPData());
blocks.add(blockData);
}
parsed = true;
}
private void encode() {
List<byte[]> encodedElements = new Vector<>();
encodedElements.add(RLP.encodeByte(BLOCKS.asByte()));
for (Block block : blocks){
encodedElements.add(block.getEncoded());
}
byte[][] encodedElementArray = encodedElements
.toArray(new byte[encodedElements.size()][]);
this.encoded = RLP.encodeList(encodedElementArray);
}
@Override
public byte[] getEncoded() {
if (encoded == null) encode();
return encoded;
}
public List<Block> getBlocks() {
if (!parsed) parse();
return blocks;
}
@Override
public EthMessageCodes getCommand(){
return EthMessageCodes.BLOCKS;
}
@Override
public Class<?> getAnswerMessage() {
return null;
}
public String toString() {
if (!parsed) parse();
StringBuffer sb = new StringBuffer();
for (Block blockData : this.getBlocks()) {
sb.append("\n ").append(blockData.toFlatString());
}
return "[" + getCommand().name() + sb.toString() + "]";
}
}