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The AWS SDK for Java - Core module holds the classes that are used by the individual service clients to interact with Amazon Web Services. Users need to depend on aws-java-sdk artifact for accessing individual client classes.
/*
* Copyright 2010-2024 Amazon.com, Inc. or its affiliates. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License").
* You may not use this file except in compliance with the License.
* A copy of the License is located at
*
* http://aws.amazon.com/apache2.0
*
* or in the "license" file accompanying this file. This file is distributed
* on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
* express or implied. See the License for the specific language governing
* permissions and limitations under the License.
*/
package com.amazonaws.transform;
import java.io.IOException;
import java.util.Collections;
import java.util.Map;
import com.amazonaws.http.HttpResponse;
import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.core.JsonToken;
/**
* Used effectively as the API to access the context of performing the
* json-related unmarshalling.
*
* For full support, see {@link JsonUnmarshallerContextImpl}
*
*/
public abstract class JsonUnmarshallerContext {
public enum UnmarshallerType {
/**
* @see SimpleTypeJsonUnmarshallers.JsonValueStringUnmarshaller
*/
JSON_VALUE
}
/**
* Returns the value of the header with the specified name from the
* response, or null if not present.
*
* @param header
* The name of the header to lookup.
*
* @return The value of the header with the specified name from the
* response. Returns null by default or if the header is not
* present.
*/
public String getHeader(String header) {
return null;
}
/**
* Returns the original HttpResponse constructed for this request. Returns
* null by default.
*/
public HttpResponse getHttpResponse() {
return null;
}
/**
* Returns the element depth of the parser's current position in the JSON
* document being parsed.
*
* @return The element depth of the parser's current position in the JSON
* document being parsed. Returns -1 by default.
*/
public int getCurrentDepth() {
return -1;
}
/**
* Returns the text of the current token, or throws an exception if the
* current token does not contain text (ex: '{', '}', etc.).
*
* @return The text of the current token. Returns null by default.
*
* @throws IOException
*/
public String readText() throws IOException {
return null;
}
/**
* Returns true if parsing of the Json document is yet to start. Returns
* false by default or if the parsing of Json document is not yet started.
*/
public boolean isStartOfDocument() {
return false;
}
/**
* Tests the specified expression (a JSON field name) against the current
* position in the JSON document being parsed.
*
* @param expression
* The field name to test.
* @return True if the expression matches the current document position,
* Returns false by default and in all other cases.
*/
public boolean testExpression(String expression) {
return false;
}
/**
* Returns the name of the JSON field that is the nearest parent of the
* current context.Returns null by default.
*/
public String getCurrentParentElement() {
return null;
}
/**
* Tests the specified expression (a JSON field name) against the current
* position in the JSON document being parsed, and restricts the expression
* to matching at the specified stack depth.
*
* @param expression
* The field name to test.
* @param stackDepth
* The depth in the stack representing where the expression must
* start matching in order for this method to return true.
*
* @return True if the specified expression matches the current position in
* the JSON document, starting from the specified depth. Returns
* false by default.
*/
public boolean testExpression(String expression, int stackDepth) {
return false;
}
/**
* Returns the next JsonToken from the JsonParser. Returns null by default.
*/
public JsonToken nextToken() throws IOException {
return null;
}
/**
* Returns the JsonToken which is to be parsed next. Returns null by
* default.
*/
public JsonToken peek() throws IOException {
return null;
}
/**
* Returns the JsonParser used for parsing the Json document. Returns null
* by default.
*/
public JsonParser getJsonParser() {
return null;
}
/**
* Returns any metadata collected through metadata expressions while this
* context was reading the JSON events from the JSON document.
*
* @return A map of any metadata collected through metadata expressions
* while this context was reading the JSON document. Returns an
* empty map by default.
*/
public Map getMetadata() {
return Collections.emptyMap();
}
/**
* Registers an expression, which if matched, will cause the data for the
* matching element to be stored in the metadata map under the specified
* key.
*
* @param expression
* The expression an element must match in order for it's data to
* be pulled out and stored in the metadata map.
* @param targetDepth
* The depth in the JSON document where the expression match must
* start.
* @param storageKey
* The key under which to store the matching element's data.
*/
public void registerMetadataExpression(String expression, int targetDepth,
String storageKey) {
}
/**
* Sets the name of the response header that is to be read next.
*/
public void setCurrentHeader(String currentHeader) {
}
/**
* Returns the current JsonToken that is to be parsed by the parser. Returns
* null by default.
*/
public JsonToken getCurrentToken() {
return null;
}
/**
* This will return the deleted string in stackString when doing update on
* the stack. Returns null by default.
*/
public String getLastParsedParentElement() {
return null;
}
/**
* Returns true if the JsonUnmarshallerContext is involved in
* parsing response headers. Else returns false. Returns true by default.
*/
public boolean isInsideResponseHeader() {
return true;
}
/**
* Returns the JsonUnmarshaller for the specified scalar type. Returns null by default.
*/
public Unmarshaller getUnmarshaller(Class type) {
return null;
}
/**
* Returns the JsonUnmarshaller for requested custom unmarshaller type. Returns null by default.
*/
public Unmarshaller getUnmarshaller(Class type, UnmarshallerType unmarshallerType) {
return null;
}
}