72 lines
2.4 KiB
Java
72 lines
2.4 KiB
Java
package org.stellar.sdk;
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/**
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* Base Asset class.
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* @see <a href="https://www.stellar.org/developers/learn/concepts/assets.html" target="_blank">Assets</a>
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*/
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public abstract class Asset {
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Asset() {}
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public static Asset create(String type, String code, String issuer) {
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if (type.equals("native")) {
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return new AssetTypeNative();
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} else {
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return Asset.createNonNativeAsset(code, KeyPair.fromAccountId(issuer));
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}
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}
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/**
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* Creates one of AssetTypeCreditAlphaNum4 or AssetTypeCreditAlphaNum12 object based on a <code>code</code> length
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* @param code Asset code
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* @param issuer Asset issuer
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*/
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public static Asset createNonNativeAsset(String code, KeyPair issuer) {
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if (code.length() >= 1 && code.length() <= 4) {
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return new AssetTypeCreditAlphaNum4(code, issuer);
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} else if (code.length() >= 5 && code.length() <= 12) {
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return new AssetTypeCreditAlphaNum12(code, issuer);
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} else {
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throw new AssetCodeLengthInvalidException();
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}
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}
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/**
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* Generates Asset object from a given XDR object
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* @param xdr XDR object
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*/
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public static Asset fromXdr(org.stellar.sdk.xdr.Asset xdr) {
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switch (xdr.getDiscriminant()) {
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case ASSET_TYPE_NATIVE:
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return new AssetTypeNative();
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case ASSET_TYPE_CREDIT_ALPHANUM4:
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String assetCode4 = Util.paddedByteArrayToString(xdr.getAlphaNum4().getAssetCode());
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KeyPair issuer4 = KeyPair.fromXdrPublicKey(
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xdr.getAlphaNum4().getIssuer().getAccountID());
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return new AssetTypeCreditAlphaNum4(assetCode4, issuer4);
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case ASSET_TYPE_CREDIT_ALPHANUM12:
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String assetCode12 = Util.paddedByteArrayToString(xdr.getAlphaNum12().getAssetCode());
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KeyPair issuer12 = KeyPair.fromXdrPublicKey(xdr.getAlphaNum12().getIssuer().getAccountID());
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return new AssetTypeCreditAlphaNum12(assetCode12, issuer12);
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default:
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throw new IllegalArgumentException("Unknown asset type " + xdr.getDiscriminant());
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}
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}
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/**
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* Returns asset type. Possible types:
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* <ul>
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* <li><code>native</code></li>
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* <li><code>credit_alphanum4</code></li>
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* <li><code>credit_alphanum12</code></li>
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* </ul>
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*/
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public abstract String getType();
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@Override
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public abstract boolean equals(Object object);
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/**
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* Generates XDR object from a given Asset object
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*/
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public abstract org.stellar.sdk.xdr.Asset toXdr();
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}
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