software.amazon.awssdk.services.billing.endpoints.internal.Rule Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of billing Show documentation
The AWS Java SDK for Billing module holds the client classes that are used for communicating with Billing.
The newest version!
/*
 * 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.billing.endpoints.internal;

import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;
import software.amazon.awssdk.annotations.SdkInternalApi;
import software.amazon.awssdk.protocols.jsoncore.JsonNode;

@SdkInternalApi
public abstract class Rule {
    public static final String CONDITIONS = "conditions";
    public static final String DOCUMENTATION = "documentation";
    public static final String ENDPOINT = "endpoint";
    public static final String ERROR = "error";

    public static final String TREE = "tree";
    public static final String RULES = "rules";
    public static final String TYPE = "type";

    protected final List conditions;
    protected final String documentation;

    protected Rule(Builder builder) {
        this.conditions = builder.conditions;
        this.documentation = builder.documentation;
    }

    public List getConditions() {
        return conditions;
    }

    public abstract  T accept(RuleValueVisitor v);

    public static Rule fromNode(JsonNode node) {
        Map objNode = node.asObject();

        Builder builder = builder();

        objNode.get(CONDITIONS).asArray().forEach(cn -> builder.addCondition(Condition.fromNode(cn)));

        JsonNode documentation = objNode.get(DOCUMENTATION);
        if (documentation != null) {
            builder.documentation(documentation.asString());
        }

        String type = objNode.get(TYPE).asString();
        switch (type) {
        case ENDPOINT:
            return builder.endpoint(EndpointResult.fromNode(objNode.get(ENDPOINT)));
        case ERROR:
            return builder.error(objNode.get(ERROR).asString());
        case TREE:
            return builder.treeRule(objNode.get(RULES).asArray().stream().map(Rule::fromNode).collect(Collectors.toList()));
        default:
            throw new IllegalStateException("Unexpected rule type: " + type);
        }
    }

    public static Builder builder() {
        return new Builder();
    }

    public static class Builder {
        private String documentation;
        private final List conditions = new ArrayList<>();

        public Builder addCondition(Condition condition) {
            this.conditions.add(condition);
            return this;
        }

        public Builder documentation(String documentation) {
            this.documentation = documentation;
            return this;
        }

        public EndpointRule endpoint(EndpointResult endpoint) {
            return new EndpointRule(this, endpoint);
        }

        public ErrorRule error(String error) {
            return new ErrorRule(this, Literal.fromStr(error));
        }

        public TreeRule treeRule(List rules) {
            return new TreeRule(this, rules);
        }
    }
}