feat: Work on support for JSON-LD 1.1.

Author: peacekeeper

src/main/java/com/danubetech/verifiablecredentials/CredentialSubject.java

@@ -0,0 +1,64 @@
+package com.danubetech.verifiablecredentials;
+
+
+import com.danubetech.verifiablecredentials.jsonld.VerifiableCredentialContexts;
+import foundation.identity.jsonld.JsonLDObject;
+import foundation.identity.jsonld.JsonLDUtils;
+
+import javax.json.JsonObject;
+import javax.json.JsonValue;
+import java.util.Map;
+
+public class CredentialSubject extends JsonLDObject {
+
+	private CredentialSubject() {
+		super(VerifiableCredentialContexts.DOCUMENT_LOADER);
+	}
+
+	public CredentialSubject(JsonObject jsonObject) {
+		super(VerifiableCredentialContexts.DOCUMENT_LOADER, jsonObject);
+	}
+
+	/*
+	 * Factory methods
+	 */
+
+	public static class Builder extends JsonLDObject.Builder<Builder, CredentialSubject> {
+
+		private Map<String, JsonValue> claims;
+
+		public Builder() {
+			super(new CredentialSubject());
+		}
+
+		@Override
+		public CredentialSubject build() {
+
+			super.build();
+
+			// add JSON-LD properties
+			if (this.claims != null) JsonLDUtils.jsonLdAddAllJsonValueMap(this.jsonLDObject.getJsonObjectBuilder(), this.claims);
+
+			return this.jsonLDObject;
+		}
+
+		public Builder claims(Map<String, JsonValue> claims) {
+			this.claims = claims;
+			return this;
+		}
+	}
+
+	public static Builder builder() {
+
+		return new Builder();
+	}
+
+	/*
+	 * Getters
+	 */
+
+	public Map<String, JsonValue> getClaims() {
+
+		return JsonLDUtils.jsonLdGetAsJsonValueMap(this.getJsonObject());
+	}
+}