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The AWS Java SDK for Amp module holds the client classes that are used for
communicating with Amp.
/*
* Copyright 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 software.amazon.awssdk.services.amp.endpoints.internal;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;
import software.amazon.awssdk.annotations.SdkInternalApi;
import software.amazon.awssdk.core.exception.SdkClientException;
import software.amazon.awssdk.protocols.jsoncore.JsonNode;
@SdkInternalApi
public class Literal extends Expr {
public interface Visitor {
T visitBool(boolean b);
T visitStr(Template value);
T visitObject(Map members);
T visitTuple(List members);
T visitInt(int value);
}
private final Lit source;
private Literal(Lit source) {
this.source = source;
}
public T accept(Visitor visitor) {
return this.source.accept(visitor);
}
public String expectLiteralString() {
if (source instanceof Str) {
Str s = (Str) source;
return s.value.expectLiteral();
} else {
throw RuleError.builder()
.cause(SourceException.builder().message("Expected a literal string, got " + source).build()).build();
}
}
@Override
public R accept(ExprVisitor visitor) {
return visitor.visitLiteral(this);
}
@Override
public Value eval(Scope scope) {
return source.accept(new Visitor() {
@Override
public Value visitInt(int value) {
return Value.fromInteger(value);
}
@Override
public Value visitBool(boolean b) {
return Value.fromBool(b);
}
@Override
public Value visitStr(Template value) {
return value.eval(scope);
}
@Override
public Value visitObject(Map members) {
Map tpe = new HashMap<>();
members.forEach((k, v) -> {
tpe.put(k, v.eval(scope));
});
return Value.fromRecord(tpe);
}
@Override
public Value visitTuple(List members) {
List tuples = new ArrayList<>();
for (Literal el : ((Tuple) source).members) {
tuples.add(el.eval(scope));
}
return Value.fromArray(tuples);
}
});
}
@Override
public boolean equals(Object o) {
if (this == o) {
return true;
}
if (o == null || getClass() != o.getClass()) {
return false;
}
if (!super.equals(o)) {
return false;
}
Literal literal = (Literal) o;
return source != null ? source.equals(literal.source) : literal.source == null;
}
@Override
public int hashCode() {
return source != null ? source.hashCode() : 0;
}
public String toString() {
return source.toString();
}
public static Literal fromNode(JsonNode node) {
Lit lit;
if (node.isArray()) {
List array = node.asArray().stream().map(Literal::fromNode).collect(Collectors.toList());
lit = new Tuple(array);
} else if (node.isBoolean()) {
lit = new Bool(node.asBoolean());
} else if (node.isNull()) {
throw SdkClientException.create("null node not supported");
} else if (node.isNumber()) {
lit = new Int(Integer.parseInt(node.asNumber()));
} else if (node.isObject()) {
Map obj = new HashMap<>();
node.asObject().forEach((k, v) -> obj.put(Identifier.of(k), fromNode(v)));
lit = new Obj(obj);
} else if (node.isString()) {
lit = new Str(new Template(node.asString()));
} else {
throw SdkClientException.create("Unable to create literal from " + node);
}
return new Literal(lit);
}
public static Literal fromTuple(List authSchemes) {
return new Literal(new Tuple(authSchemes));
}
public static Literal fromRecord(Map record) {
return new Literal(new Obj(record));
}
public static Literal fromStr(Template value) {
return new Literal(new Str(value));
}
public static Literal fromStr(String s) {
return fromStr(new Template(s));
}
public static Literal fromInteger(int value) {
return new Literal(new Int(value));
}
public static Literal fromBool(boolean value) {
return new Literal(new Bool(value));
}
private interface Lit {
T accept(Visitor visitor);
}
static final class Int implements Lit {
private final Integer value;
Int(Integer value) {
this.value = value;
}
@Override
public T accept(Visitor visitor) {
return visitor.visitInt(value);
}
@Override
public String toString() {
return Integer.toString(value);
}
@Override
public boolean equals(Object o) {
if (this == o) {
return true;
}
if (o == null || getClass() != o.getClass()) {
return false;
}
Int anInt = (Int) o;
return value != null ? value.equals(anInt.value) : anInt.value == null;
}
@Override
public int hashCode() {
return value != null ? value.hashCode() : 0;
}
}
static final class Tuple implements Lit {
private final List members;
Tuple(List members) {
this.members = members;
}
@Override
public T accept(Visitor visitor) {
return visitor.visitTuple(members);
}
@Override
public String toString() {
return members.stream().map(Literal::toString).collect(Collectors.joining(", ", "[", "]"));
}
public List members() {
return members;
}
@Override
public boolean equals(Object o) {
if (this == o) {
return true;
}
if (o == null || getClass() != o.getClass()) {
return false;
}
Tuple tuple = (Tuple) o;
return members != null ? members.equals(tuple.members) : tuple.members == null;
}
@Override
public int hashCode() {
return members != null ? members.hashCode() : 0;
}
}
static final class Obj implements Lit {
private final Map members;
Obj(Map members) {
this.members = members;
}
@Override
public T accept(Visitor visitor) {
return visitor.visitObject(members);
}
@Override
public String toString() {
return members.toString();
}
public Map members() {
return members;
}
@Override
public boolean equals(Object o) {
if (this == o) {
return true;
}
if (o == null || getClass() != o.getClass()) {
return false;
}
Obj obj = (Obj) o;
return members != null ? members.equals(obj.members) : obj.members == null;
}
@Override
public int hashCode() {
return members != null ? members.hashCode() : 0;
}
}
static final class Bool implements Lit {
private final boolean value;
Bool(boolean value) {
this.value = value;
}
@Override
public T accept(Visitor visitor) {
return visitor.visitBool(value);
}
@Override
public String toString() {
return Boolean.toString(value);
}
public Boolean value() {
return value;
}
@Override
public boolean equals(Object o) {
if (this == o) {
return true;
}
if (o == null || getClass() != o.getClass()) {
return false;
}
Bool bool = (Bool) o;
return value == bool.value;
}
@Override
public int hashCode() {
return value ? 1 : 0;
}
}
static final class Str implements Lit {
private final Template value;
Str(Template value) {
this.value = value;
}
@Override
public T accept(Visitor visitor) {
return visitor.visitStr(value);
}
@Override
public String toString() {
return value.toString();
}
public Template value() {
return value;
}
@Override
public boolean equals(Object o) {
if (this == o) {
return true;
}
if (o == null || getClass() != o.getClass()) {
return false;
}
Str str = (Str) o;
return value != null ? value.equals(str.value) : str.value == null;
}
@Override
public int hashCode() {
return value != null ? value.hashCode() : 0;
}
}
}
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