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added functions

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This commit is contained in:
Aniket Anerao 2022-08-24 23:04:12 +05:30
parent aef3c42eb0
commit 29905f6ca9
1 changed files with 59 additions and 7 deletions
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66
ins-fraud-check/chaincode-java/src/main/java/org/hyperledger/fabric/samples/insfraudcheck/ClaimProcessing.java
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@ -1,7 +1,7 @@
package org.hyperledger.fabric.samples.insfraudcheck; package org.hyperledger.fabric.samples.insfraudcheck;
//import java.util.ArrayList; import java.util.ArrayList;
//import java.util.List; import java.util.List;
import org.hyperledger.fabric.contract.Context; import org.hyperledger.fabric.contract.Context;
@ -15,8 +15,8 @@ import org.hyperledger.fabric.contract.annotation.Transaction;
//import org.hyperledger.fabric.samples.insfraudcheck.InsClaim; //import org.hyperledger.fabric.samples.insfraudcheck.InsClaim;
import org.hyperledger.fabric.shim.ChaincodeException; import org.hyperledger.fabric.shim.ChaincodeException;
import org.hyperledger.fabric.shim.ChaincodeStub; import org.hyperledger.fabric.shim.ChaincodeStub;
//import org.hyperledger.fabric.shim.ledger.KeyValue; import org.hyperledger.fabric.shim.ledger.KeyValue;
//import org.hyperledger.fabric.shim.ledger.QueryResultsIterator; import org.hyperledger.fabric.shim.ledger.QueryResultsIterator;
import com.owlike.genson.Genson; import com.owlike.genson.Genson;
@ -57,11 +57,11 @@ public final class ClaimProcessing implements ContractInterface {
} }
/** /**
* Checks the existence of the asset on the ledger * Checks the existence of the Claim on the ledger
* *
* @param ctx the transaction context * @param ctx the transaction context
* @param assetID the ID of the asset * @param claimID the ID of the claim
* @return boolean indicating the existence of the asset * @return boolean indicating the existence of the Claim
*/ */
@Transaction(intent = Transaction.TYPE.EVALUATE) @Transaction(intent = Transaction.TYPE.EVALUATE)
public boolean ClaimExists(final Context ctx, final String claimID) { public boolean ClaimExists(final Context ctx, final String claimID) {
@ -101,4 +101,56 @@ public final class ClaimProcessing implements ContractInterface {
return claim; return claim;
} }
/**
* Retrieves an claim with the specified ID from the ledger.
*
* @param ctx the transaction context
* @param claimID the ID of the claim
* @return the claim found on the ledger if there was one
*/
@Transaction(intent = Transaction.TYPE.EVALUATE)
public InsClaim ReadClaim(final Context ctx, final String claimID) {
ChaincodeStub stub = ctx.getStub();
String claimJSON = stub.getStringState(claimID);
if (claimJSON == null || claimJSON.isEmpty()) {
String errorMessage = String.format("Claim %s does not exist", claimID);
System.out.println(errorMessage);
throw new ChaincodeException(errorMessage, ClaimProcessingErrors.CLAIM_NOT_FOUND.toString());
}
InsClaim claim = genson.deserialize(claimJSON, InsClaim.class);
return claim;
}
/**
* Retrieves all claims from the ledger.
*
* @param ctx the transaction context
* @return array of claims found on the ledger
*/
@Transaction(intent = Transaction.TYPE.EVALUATE)
public String GetAllClaims(final Context ctx) {
ChaincodeStub stub = ctx.getStub();
List<InsClaim> queryResults = new ArrayList<InsClaim>();
// To retrieve all claims from the ledger use getStateByRange with empty startKey & endKey.
// Giving empty startKey & endKey is interpreted as all the keys from beginning to end.
// As another example, if you use startKey = 'claim0', endKey = 'claim9' ,
// then getStateByRange will retrieve claim with keys between claim0 (inclusive) and claim9 (exclusive) in lexical order.
QueryResultsIterator<KeyValue> results = stub.getStateByRange("", "");
for (KeyValue result: results) {
InsClaim claim = genson.deserialize(result.getStringValue(), InsClaim.class);
System.out.println(claim);
queryResults.add(claim);
}
final String response = genson.serialize(queryResults);
return response;
}
} }