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GlobalErrorRegistry.java
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GlobalErrorRegistry.java
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/*
* Copyright (c) 2017 Contributors to the Eclipse Foundation
*
* See the NOTICE file(s) distributed with this work for additional
* information regarding copyright ownership.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License 2.0 which is available at
* http://www.eclipse.org/legal/epl-2.0
*
* SPDX-License-Identifier: EPL-2.0
*/
package org.eclipse.ditto.base.model.signals;
import java.util.HashMap;
import java.util.Map;
import javax.annotation.Nullable;
import javax.annotation.concurrent.Immutable;
import org.eclipse.ditto.base.model.exceptions.DittoJsonException;
import org.eclipse.ditto.base.model.exceptions.DittoRuntimeException;
import org.eclipse.ditto.base.model.headers.DittoHeaders;
import org.eclipse.ditto.base.model.json.JsonParsableException;
import org.eclipse.ditto.json.JsonFieldSelectorInvalidException;
import org.eclipse.ditto.json.JsonKeyInvalidException;
import org.eclipse.ditto.json.JsonMissingFieldException;
import org.eclipse.ditto.json.JsonObject;
import org.eclipse.ditto.json.JsonParseException;
import org.eclipse.ditto.json.JsonPointerInvalidException;
import org.eclipse.ditto.json.JsonRuntimeException;
/**
* Contains all strategies to deserialize subclasses of {@link org.eclipse.ditto.base.model.exceptions.DittoRuntimeException} from a combination of
* {@link org.eclipse.ditto.json.JsonObject} and {@link org.eclipse.ditto.base.model.headers.DittoHeaders}.
*/
@Immutable
public final class GlobalErrorRegistry
extends AbstractGlobalJsonParsableRegistry<DittoRuntimeException, JsonParsableException>
implements ErrorRegistry<DittoRuntimeException> {
private static final GlobalErrorRegistry INSTANCE = new GlobalErrorRegistry(new DittoJsonExceptionRegistry());
private GlobalErrorRegistry(final DittoJsonExceptionRegistry dittoJsonExceptionRegistry) {
super(
DittoRuntimeException.class,
JsonParsableException.class,
new ExceptionParsingStrategyFactory(),
dittoJsonExceptionRegistry.getDittoJsonParseRegistries()
);
}
/**
* Gets an instance of GlobalErrorRegistry.
*
* @return the instance.
*/
public static GlobalErrorRegistry getInstance() {
return INSTANCE;
}
@Override
protected String resolveType(final JsonObject jsonObject) {
return jsonObject.getValue(DittoRuntimeException.JsonFields.ERROR_CODE)
.orElseThrow(() -> JsonMissingFieldException.newBuilder()
.fieldName(DittoRuntimeException.JsonFields.ERROR_CODE.getPointer().toString())
.build());
}
@Override
public DittoRuntimeException parse(final String jsonString, final DittoHeaders dittoHeaders) {
try {
return super.parse(jsonString, dittoHeaders);
} catch (final JsonTypeNotParsableException e) {
return UnknownDittoRuntimeException.fromJson(JsonObject.of(jsonString), dittoHeaders);
}
}
@Override
public DittoRuntimeException parse(final JsonObject jsonObject, final DittoHeaders dittoHeaders) {
try {
return super.parse(jsonObject, dittoHeaders);
} catch (final JsonTypeNotParsableException e) {
return UnknownDittoRuntimeException.fromJson(jsonObject, dittoHeaders);
}
}
@Override
public DittoRuntimeException parse(final JsonObject jsonObject, final DittoHeaders dittoHeaders,
final ParseInnerJson parseInnerJson) {
try {
return super.parse(jsonObject, dittoHeaders, parseInnerJson);
} catch (final JsonTypeNotParsableException e) {
return UnknownDittoRuntimeException.fromJson(jsonObject, dittoHeaders);
}
}
/**
* Contains all strategies to deserialize {@link org.eclipse.ditto.base.model.exceptions.DittoJsonException} from a combination of
* {@link org.eclipse.ditto.json.JsonObject} and {@link org.eclipse.ditto.base.model.headers.DittoHeaders}.
*/
private static final class DittoJsonExceptionRegistry {
private final Map<String, JsonParsable<DittoRuntimeException>> dittoJsonParseRegistries = new HashMap<>();
private DittoJsonExceptionRegistry() {
dittoJsonParseRegistries.put(DittoJsonException.FALLBACK_ERROR_CODE,
(jsonObject, dittoHeaders) -> new DittoJsonException(
JsonRuntimeException.newBuilder(DittoJsonException.FALLBACK_ERROR_CODE)
.message(getMessage(jsonObject))
.description(getDescription(jsonObject))
.build(), dittoHeaders));
dittoJsonParseRegistries.put(JsonParseException.ERROR_CODE,
(jsonObject, dittoHeaders) -> new DittoJsonException(
JsonParseException.newBuilder()
.message(getMessage(jsonObject))
.description(getDescription(jsonObject))
.build(), dittoHeaders));
dittoJsonParseRegistries.put(JsonMissingFieldException.ERROR_CODE,
(jsonObject, dittoHeaders) -> new DittoJsonException(
JsonMissingFieldException.newBuilder()
.message(getMessage(jsonObject))
.description(getDescription(jsonObject))
.build(),
dittoHeaders));
dittoJsonParseRegistries.put(JsonFieldSelectorInvalidException.ERROR_CODE,
(jsonObject, dittoHeaders) -> new DittoJsonException(
JsonFieldSelectorInvalidException.newBuilder()
.message(getMessage(jsonObject))
.description(getDescription(jsonObject))
.build(),
dittoHeaders));
dittoJsonParseRegistries.put(JsonPointerInvalidException.ERROR_CODE,
(jsonObject, dittoHeaders) -> new DittoJsonException(
JsonPointerInvalidException.newBuilder()
.message(getMessage(jsonObject))
.description(getDescription(jsonObject))
.build(),
dittoHeaders));
dittoJsonParseRegistries.put(JsonKeyInvalidException.ERROR_CODE,
(jsonObject, dittoHeaders) -> new DittoJsonException(
JsonKeyInvalidException.newBuilder()
.message(getMessage(jsonObject))
.description(getDescription(jsonObject))
.build(),
dittoHeaders));
}
@Nullable
private static String getMessage(final JsonObject jsonObject) {
return jsonObject.getValue(DittoRuntimeException.JsonFields.MESSAGE).orElse(null);
}
@Nullable
private static String getDescription(final JsonObject jsonObject) {
return jsonObject.getValue(DittoRuntimeException.JsonFields.DESCRIPTION).orElse(null);
}
private Map<String, JsonParsable<DittoRuntimeException>> getDittoJsonParseRegistries() {
return dittoJsonParseRegistries;
}
}
/**
* Contains all strategies to deserialize {@link org.eclipse.ditto.base.model.exceptions.DittoRuntimeException} annotated with {@link org.eclipse.ditto.base.model.json.JsonParsableException}
* from a combination of {@link org.eclipse.ditto.json.JsonObject} and {@link org.eclipse.ditto.base.model.headers.DittoHeaders}.
*/
private static final class ExceptionParsingStrategyFactory
extends AbstractAnnotationBasedJsonParsableFactory<DittoRuntimeException, JsonParsableException> {
private ExceptionParsingStrategyFactory() {}
@Override
protected String getKeyFor(final JsonParsableException annotation) {
return annotation.errorCode();
}
@Override
protected String getMethodNameFor(final JsonParsableException annotation) {
return annotation.method();
}
}
}