com.ibm.fhir.audit.cadf.CadfReason Maven / Gradle / Ivy
/*
* (C) Copyright IBM Corp. 2019, 2020
*
* SPDX-License-Identifier: Apache-2.0
*/
package com.ibm.fhir.audit.cadf;
import java.io.IOException;
import java.io.InputStream;
import java.io.StringWriter;
import java.nio.charset.StandardCharsets;
import java.util.Collections;
import java.util.Map;
import javax.json.Json;
import javax.json.JsonObject;
import javax.json.JsonReader;
import javax.json.JsonReaderFactory;
import javax.json.stream.JsonGenerator;
import javax.json.stream.JsonGeneratorFactory;
import com.ibm.fhir.exception.FHIRException;
/**
* Outcome reason. Provides additional information to describe the event outcome
*/
public final class CadfReason {
private final String reasonType;
private final String reasonCode;
private final String policyType;
private final String policyId;
/**
* Create a CADF Reason object
*
* @param reasonType - String. The reason code domain URI. Must be present if
* reasonCode is present.
* @param reasonCode - String. Detailed result code as described by the domain
* identifier (reason type). Must be specified if policyId is
* not specified.
* @param policyType - String. The policy domain URI. Must be present if
* policyId is present.
* @param policyId - String. An optional identifier that indicates which
* policy or algorithm was applied in order to achieve the
* described OUTCOME. Must be specified if reasonCode is not
* specified.
*/
public CadfReason(String reasonType, String reasonCode, String policyType, String policyId) {
this.reasonType = reasonType;
this.reasonCode = reasonCode;
this.policyId = policyId;
this.policyType = policyType;
}
public String getReasonType() {
return reasonType;
}
public String getReasonCode() {
return reasonCode;
}
public String getPolicyType() {
return policyType;
}
public String getPolicyId() {
return policyId;
}
/**
* Validate contents of the Reason type.
* The logic is determined by the CADF specification.
*
* @return This object for chaining.
* @throws IllegalStateException when the properties do not meet the
* specification.
*/
public CadfReason validate() throws IllegalStateException {
if (policyId == null && reasonCode == null) {
throw new IllegalStateException("at least one of: policyId, reasonCode must be specified");
}
if (reasonCode != null) {
// it must not be empty, and reasonType must be specified and non-empty
if (reasonCode.length() == 0) {
throw new IllegalStateException("invalid reasonCode");
}
if (reasonType == null || reasonType.length() == 0) {
throw new IllegalStateException("invalid reasonType");
}
}
if (policyId != null) {
// it must not be empty, and policyType must be specified and non-empty
if (policyId.length() == 0) {
throw new IllegalStateException("invalid policyId");
}
if (policyType == null || policyType.length() == 0) {
throw new IllegalStateException("invalid policyType");
}
}
return this;
}
/**
* Generates JSON from this object.
*/
public static class Writer {
private Writer() {
// No Operation
}
private static final Map properties =
Collections.singletonMap(JsonGenerator.PRETTY_PRINTING, true);
private static final JsonGeneratorFactory PRETTY_PRINTING_GENERATOR_FACTORY =
Json.createGeneratorFactory(properties);
/**
* @param obj
* @return
* @throws IOException
*/
public static String generate(CadfReason obj)
throws IOException {
String o = "{}";
try (StringWriter writer = new StringWriter();) {
try (JsonGenerator generator =
PRETTY_PRINTING_GENERATOR_FACTORY.createGenerator(writer);) {
generator.writeStartObject();
generate(obj, generator);
generator.writeEnd();
}
o = writer.toString();
}
return o;
}
public static void generate(CadfReason obj, JsonGenerator generator)
throws IOException {
// If the CADF reason is null, then simply skip it.
if (obj == null) {
return;
}
if (obj.getReasonType() != null) {
generator.write("reasonType", obj.getReasonType());
}
if (obj.getReasonCode() != null) {
generator.write("reasonCode", obj.getReasonCode());
}
if (obj.getPolicyType() != null) {
generator.write("policyType", obj.getPolicyType());
}
if (obj.getPolicyId() != null) {
generator.write("policyId", obj.getPolicyId());
}
}
}
/**
* Parser
*/
public static class Parser {
private Parser() {
// No Impl
}
private static final JsonReaderFactory JSON_READER_FACTORY = Json.createReaderFactory(null);
public static CadfReason parse(InputStream in)
throws FHIRException {
try (JsonReader jsonReader =
JSON_READER_FACTORY.createReader(in, StandardCharsets.UTF_8)) {
JsonObject jsonObject = jsonReader.readObject();
return parse(jsonObject);
} catch (Exception e) {
throw new FHIRException("Problem parsing the CadfReason", e);
}
}
public static CadfReason parse(JsonObject jsonObject)
throws FHIRException {
CadfReason.Builder builder =
CadfReason.builder();
if (jsonObject.get("reasonType") != null) {
String reasonType = jsonObject.getString("reasonType");
builder.reasonType(reasonType);
}
if (jsonObject.get("reasonCode") != null) {
String reasonCode = jsonObject.getString("reasonCode");
builder.reasonCode(reasonCode);
}
if (jsonObject.get("policyType") != null) {
String policyType = jsonObject.getString("policyType");
builder.policyType(policyType);
}
if (jsonObject.get("policyId") != null) {
String policyId = jsonObject.getString("policyId");
builder.policyId(policyId);
}
return builder.build();
}
}
/**
* Builder is a convenience pattern to assemble to Java Object
*/
public static class Builder {
private String policyId = null;
private String policyType = null;
private String reasonCode = null;
private String reasonType = null;
private Builder() {
// Intentionally hiding from external callers.
}
public Builder policyId(String policyId) {
this.policyId = policyId;
return this;
}
public Builder policyType(String policyType) {
this.policyType = policyType;
return this;
}
public Builder reasonCode(String reasonCode) {
this.reasonCode = reasonCode;
return this;
}
public Builder reasonType(String reasonType) {
this.reasonType = reasonType;
return this;
}
public CadfReason build() {
return new CadfReason(reasonType, reasonCode, policyType, policyId);
}
}
public static Builder builder() {
return new Builder();
}
}