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Java SDK for Serverless Workflow Specification
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package io.serverlessworkflow.api.functions;

import java.io.Serializable;
import java.util.HashMap;
import java.util.Map;
import javax.validation.Valid;
import javax.validation.constraints.NotNull;
import javax.validation.constraints.Size;
import com.fasterxml.jackson.annotation.JsonCreator;
import com.fasterxml.jackson.annotation.JsonInclude;
import com.fasterxml.jackson.annotation.JsonProperty;
import com.fasterxml.jackson.annotation.JsonPropertyDescription;
import com.fasterxml.jackson.annotation.JsonPropertyOrder;
import com.fasterxml.jackson.annotation.JsonValue;
import com.fasterxml.jackson.databind.JsonNode;

@JsonInclude(JsonInclude.Include.NON_NULL)
@JsonPropertyOrder({
    "refName",
    "arguments",
    "selectionSet",
    "invoke"
})
public class FunctionRef implements Serializable
{

    /**
     * Name of the referenced function
     * (Required)
     * 
     */
    @JsonProperty("refName")
    @JsonPropertyDescription("Name of the referenced function")
    @Size(min = 1)
    @NotNull
    private String refName;
    /**
     * Function arguments
     * 
     */
    @JsonProperty("arguments")
    @JsonPropertyDescription("Function arguments")
    @Valid
    private JsonNode arguments;
    /**
     * Only used if function type is 'graphql'. A string containing a valid GraphQL selection set
     * 
     */
    @JsonProperty("selectionSet")
    @JsonPropertyDescription("Only used if function type is 'graphql'. A string containing a valid GraphQL selection set")
    private String selectionSet;
    /**
     * Specifies if the function should be invoked sync or async. Default is sync.
     * 
     */
    @JsonProperty("invoke")
    @JsonPropertyDescription("Specifies if the function should be invoked sync or async. Default is sync.")
    private FunctionRef.Invoke invoke = FunctionRef.Invoke.fromValue("sync");
    private final static long serialVersionUID = -194299573266930319L;

    /**
     * No args constructor for use in serialization
     * 
     */
    public FunctionRef() {
    }

    /**
     * 
     * @param refName
     */
    public FunctionRef(String refName) {
        super();
        this.refName = refName;
    }

    /**
     * Name of the referenced function
     * (Required)
     * 
     */
    @JsonProperty("refName")
    public String getRefName() {
        return refName;
    }

    /**
     * Name of the referenced function
     * (Required)
     * 
     */
    @JsonProperty("refName")
    public void setRefName(String refName) {
        this.refName = refName;
    }

    public FunctionRef withRefName(String refName) {
        this.refName = refName;
        return this;
    }

    /**
     * Function arguments
     * 
     */
    @JsonProperty("arguments")
    public JsonNode getArguments() {
        return arguments;
    }

    /**
     * Function arguments
     * 
     */
    @JsonProperty("arguments")
    public void setArguments(JsonNode arguments) {
        this.arguments = arguments;
    }

    public FunctionRef withArguments(JsonNode arguments) {
        this.arguments = arguments;
        return this;
    }

    /**
     * Only used if function type is 'graphql'. A string containing a valid GraphQL selection set
     * 
     */
    @JsonProperty("selectionSet")
    public String getSelectionSet() {
        return selectionSet;
    }

    /**
     * Only used if function type is 'graphql'. A string containing a valid GraphQL selection set
     * 
     */
    @JsonProperty("selectionSet")
    public void setSelectionSet(String selectionSet) {
        this.selectionSet = selectionSet;
    }

    public FunctionRef withSelectionSet(String selectionSet) {
        this.selectionSet = selectionSet;
        return this;
    }

    /**
     * Specifies if the function should be invoked sync or async. Default is sync.
     * 
     */
    @JsonProperty("invoke")
    public FunctionRef.Invoke getInvoke() {
        return invoke;
    }

    /**
     * Specifies if the function should be invoked sync or async. Default is sync.
     * 
     */
    @JsonProperty("invoke")
    public void setInvoke(FunctionRef.Invoke invoke) {
        this.invoke = invoke;
    }

    public FunctionRef withInvoke(FunctionRef.Invoke invoke) {
        this.invoke = invoke;
        return this;
    }

    public enum Invoke {

        SYNC("sync"),
        ASYNC("async");
        private final String value;
        private final static Map CONSTANTS = new HashMap();

        static {
            for (FunctionRef.Invoke c: values()) {
                CONSTANTS.put(c.value, c);
            }
        }

        private Invoke(String value) {
            this.value = value;
        }

        @Override
        public String toString() {
            return this.value;
        }

        @JsonValue
        public String value() {
            return this.value;
        }

        @JsonCreator
        public static FunctionRef.Invoke fromValue(String value) {
            FunctionRef.Invoke constant = CONSTANTS.get(value);
            if (constant == null) {
                throw new IllegalArgumentException(value);
            } else {
                return constant;
            }
        }

    }

}