com.github.tomakehurst.wiremock.http.HttpHeadersJsonDeserializer Maven / Gradle / Ivy

/*
 * Copyright (C) 2011 Thomas Akehurst
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License 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.github.tomakehurst.wiremock.http;

import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.databind.DeserializationContext;
import com.fasterxml.jackson.databind.JsonDeserializer;
import com.fasterxml.jackson.databind.JsonNode;
import com.google.common.base.Function;
import com.google.common.collect.ImmutableList;

import java.io.IOException;
import java.util.Iterator;
import java.util.Map;

import static com.google.common.collect.Iterables.transform;

public class HttpHeadersJsonDeserializer extends JsonDeserializer {

    @Override
    public HttpHeaders deserialize(JsonParser parser, DeserializationContext context) throws IOException {
        JsonNode rootNode = parser.readValueAsTree();
        return new HttpHeaders(transform(all(rootNode.fields()), toHttpHeaders()));
    }

    private static Function, HttpHeader> toHttpHeaders() {
        return new Function, HttpHeader>() {
            @Override
            public HttpHeader apply(Map.Entry field) {
                String key = field.getKey();
                if (field.getValue().isArray()) {
                    return new HttpHeader(key,
                            ImmutableList.copyOf(transform(all(field.getValue().elements()), toStringValues())));
                } else {
                    return new HttpHeader(key, field.getValue().textValue());
                }
            }
        };
    }

    private static Function toStringValues() {
        return new Function() {
            public String apply(JsonNode node) {
                return node.textValue();
            }
        };
    }

    public static  Iterable all(final Iterator underlyingIterator) {
        return new Iterable() {
            public Iterator iterator() {
                return underlyingIterator;
            }
        };
    }
}