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Add abstractions for converting between SCVal and native types.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,94 @@ | ||
| package org.stellar.sdk.scval; | ||
|
|
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| import java.math.BigInteger; | ||
| import java.util.Arrays; | ||
| import org.stellar.sdk.xdr.SCVal; | ||
| import org.stellar.sdk.xdr.SCValType; | ||
|
|
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| /** Abstract class for all SCV types. */ | ||
| public abstract class Scv { | ||
|
|
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| /** | ||
| * Convert this object to {@link SCVal}. | ||
| * | ||
| * @return {@link SCVal} | ||
| */ | ||
| public abstract SCVal toSCVal(); | ||
|
|
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| /** | ||
| * Get the {@link SCValType} of this object. | ||
| * | ||
| * @return {@link SCValType} | ||
| */ | ||
| public abstract SCValType getSCValType(); | ||
|
|
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| /** | ||
| * Convert from {@link SCVal} to {@link Scv}. | ||
| * | ||
| * @param scVal {@link SCVal} to convert | ||
| * @return {@link Scv} | ||
| */ | ||
| public static Scv fromSCVal(SCVal scVal) { | ||
| switch (scVal.getDiscriminant()) { | ||
| case SCV_BOOL: | ||
| return ScvBoolean.fromSCVal(scVal); | ||
| case SCV_VOID: | ||
| return ScvVoid.fromSCVal(scVal); | ||
| case SCV_ERROR: | ||
| return ScvError.fromSCVal(scVal); | ||
| case SCV_U32: | ||
| return ScvUint32.fromSCVal(scVal); | ||
| case SCV_I32: | ||
| return ScvInt32.fromSCVal(scVal); | ||
| case SCV_U64: | ||
| return ScvUint64.fromSCVal(scVal); | ||
| case SCV_I64: | ||
| return ScvInt64.fromSCVal(scVal); | ||
| case SCV_TIMEPOINT: | ||
| return ScvTimePoint.fromSCVal(scVal); | ||
| case SCV_DURATION: | ||
| return ScvDuration.fromSCVal(scVal); | ||
| case SCV_U128: | ||
| return ScvUint128.fromSCVal(scVal); | ||
| case SCV_I128: | ||
| return ScvInt128.fromSCVal(scVal); | ||
| case SCV_U256: | ||
| return ScvUint256.fromSCVal(scVal); | ||
| case SCV_I256: | ||
| return ScvInt256.fromSCVal(scVal); | ||
| case SCV_BYTES: | ||
| return ScvBytes.fromSCVal(scVal); | ||
| case SCV_STRING: | ||
| return ScvString.fromSCVal(scVal); | ||
| case SCV_SYMBOL: | ||
| return ScvSymbol.fromSCVal(scVal); | ||
| case SCV_VEC: | ||
| return ScvVec.fromSCVal(scVal); | ||
| case SCV_MAP: | ||
| return ScvMap.fromSCVal(scVal); | ||
| case SCV_ADDRESS: | ||
| return ScvAddress.fromSCVal(scVal); | ||
| case SCV_CONTRACT_INSTANCE: | ||
| return ScvContractInstance.fromSCVal(scVal); | ||
| case SCV_LEDGER_KEY_CONTRACT_INSTANCE: | ||
| return ScvLedgerKeyContractInstance.fromSCVal(scVal); | ||
| case SCV_LEDGER_KEY_NONCE: | ||
| return ScvLedgerKeyNonce.fromSCVal(scVal); | ||
| default: | ||
| throw new IllegalArgumentException( | ||
| String.format("unsupported scVal type: %s", scVal.getDiscriminant())); | ||
| } | ||
| } | ||
|
|
||
| static byte[] getBytes(BigInteger value) { | ||
| byte[] bytes = value.toByteArray(); | ||
| if (bytes.length < 8) { | ||
| byte[] temp = new byte[8]; | ||
| System.arraycopy(bytes, 0, temp, 8 - bytes.length, bytes.length); | ||
| bytes = temp; | ||
| } else if (bytes.length > 8) { | ||
| bytes = Arrays.copyOfRange(bytes, bytes.length - 8, bytes.length); | ||
| } | ||
| return bytes; | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,36 @@ | ||
| package org.stellar.sdk.scval; | ||
|
|
||
| import lombok.EqualsAndHashCode; | ||
| import lombok.RequiredArgsConstructor; | ||
| import lombok.Value; | ||
| import org.stellar.sdk.xdr.SCVal; | ||
| import org.stellar.sdk.xdr.SCValType; | ||
|
|
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| @Value | ||
| @RequiredArgsConstructor | ||
| @EqualsAndHashCode(callSuper = false) | ||
| public class ScvBoolean extends Scv { | ||
| private static final SCValType TYPE = SCValType.SCV_BOOL; | ||
|
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| Boolean value; | ||
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| @Override | ||
| public SCVal toSCVal() { | ||
| return new SCVal.Builder().discriminant(TYPE).b(value).build(); | ||
| } | ||
|
|
||
| @Override | ||
| public SCValType getSCValType() { | ||
| return TYPE; | ||
| } | ||
|
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| public static ScvBoolean fromSCVal(SCVal scVal) { | ||
| if (scVal.getDiscriminant() != TYPE) { | ||
| throw new IllegalArgumentException( | ||
| String.format( | ||
| "invalid scVal type, expected %s, but got %s", TYPE, scVal.getDiscriminant())); | ||
| } | ||
|
|
||
| return new ScvBoolean(scVal.getB()); | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,37 @@ | ||
| package org.stellar.sdk.scval; | ||
|
|
||
| import lombok.EqualsAndHashCode; | ||
| import lombok.RequiredArgsConstructor; | ||
| import lombok.Value; | ||
| import org.stellar.sdk.xdr.SCBytes; | ||
| import org.stellar.sdk.xdr.SCVal; | ||
| import org.stellar.sdk.xdr.SCValType; | ||
|
|
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| @Value | ||
| @RequiredArgsConstructor | ||
| @EqualsAndHashCode(callSuper = false) | ||
| public class ScvBytes extends Scv { | ||
| private static final SCValType TYPE = SCValType.SCV_BYTES; | ||
|
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| byte[] value; | ||
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| @Override | ||
| public SCVal toSCVal() { | ||
| return new SCVal.Builder().discriminant(TYPE).bytes(new SCBytes(value)).build(); | ||
| } | ||
|
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| @Override | ||
| public SCValType getSCValType() { | ||
| return TYPE; | ||
| } | ||
|
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| public static ScvBytes fromSCVal(SCVal scVal) { | ||
| if (scVal.getDiscriminant() != TYPE) { | ||
| throw new IllegalArgumentException( | ||
| String.format( | ||
| "invalid scVal type, expected %s, but got %s", TYPE, scVal.getDiscriminant())); | ||
| } | ||
|
|
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| return new ScvBytes(scVal.getBytes().getSCBytes()); | ||
| } | ||
| } |
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