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A simple but powerful web server framework

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package io.muserver.openapi;

import java.io.IOException;
import java.io.Writer;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;

/**
 * @see PathsObjectBuilder
 */
public class PathsObject implements JsonWriter {

    public final Map pathItemObjects;

    PathsObject(Map pathItemObjects) {
        if (pathItemObjects != null) {
            for (String path : pathItemObjects.keySet()) {
                if (!path.startsWith("/")) {
                    throw new IllegalArgumentException("Each path must start with a '/' but got '" + path + "' from " + pathItemObjects);
                }
            }
            Set ids = new HashSet<>();
            for (PathItemObject pathItemObject : pathItemObjects.values()) {
                if (pathItemObject.operations != null) {
                    for (OperationObject oo : pathItemObject.operations.values()) {
                        if (oo.operationId != null) {
                            if (ids.contains(oo.operationId)) {
                                throw new IllegalArgumentException("Cannot have duplicate operation IDs, but got " + oo.operationId);
                            }
                            ids.add(oo.operationId);
                        }
                    }
                }
            }
        }
        this.pathItemObjects = pathItemObjects;
    }

    @Override
    public void writeJson(Writer writer) throws IOException {
        writer.append('{');
        boolean isFirst = true;
        if (pathItemObjects != null) {
            for (Map.Entry entry : pathItemObjects.entrySet()) {
                isFirst = Jsonizer.append(writer, entry.getKey(), entry.getValue(), isFirst);
            }
        }
        writer.append('}');
    }
}