org.osiam.resources.helper.ExtensionDeserializer Maven / Gradle / Ivy

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/*
 * Copyright (C) 2013 tarent AG
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
 * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

package org.osiam.resources.helper;

import java.io.IOException;
import java.math.BigDecimal;
import java.math.BigInteger;
import java.util.Iterator;
import java.util.Map;

import org.osiam.resources.scim.Extension;
import org.osiam.resources.scim.ExtensionFieldType;

import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.databind.DeserializationContext;
import com.fasterxml.jackson.databind.JsonMappingException;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.deser.std.StdDeserializer;
import com.fasterxml.jackson.databind.node.JsonNodeType;

/**
 * This class is package-private by intention. If you need to use it, something went wrong.
 */
class ExtensionDeserializer extends StdDeserializer {

    private static final long serialVersionUID = 2581146730706177962L;

    private String urn;

    protected ExtensionDeserializer(Class vc) {
        super(vc);
    }

    @Override
    public Extension deserialize(JsonParser jp, DeserializationContext ctxt) throws IOException {
        if (urn == null || urn.isEmpty()) {
            throw new IllegalStateException("The URN cannot be null or empty");
        }
        JsonNode rootNode = jp.readValueAsTree();
        if (rootNode.getNodeType() != JsonNodeType.OBJECT) {
            throw new JsonMappingException("Extension is of wrong JSON type");
        }
        Extension extension = new Extension(urn);
        Iterator> fieldIterator = rootNode.fields();
        while (fieldIterator.hasNext()) {
            Map.Entry entry = fieldIterator.next();
            switch (entry.getValue().getNodeType()) {
                case BOOLEAN:
                    handleBoolean(extension, entry);
                    break;
                case STRING:
                    handleString(extension, entry);
                    break;
                case NUMBER:
                    handleNumber(extension, entry);
                    break;
                default:
                    throw new IllegalArgumentException("JSON type not supported: " + entry.getValue().getNodeType());
            }
        }

        return extension;
    }

    private void handleNumber(Extension extension, Map.Entry entry) {

        String stringValue = entry.getValue().asText();
        if (stringValue.contains(".")) {
            BigDecimal value = ExtensionFieldType.DECIMAL.fromString(stringValue);
            extension.addOrUpdateField(entry.getKey(), value);
        } else {
            BigInteger value = ExtensionFieldType.INTEGER.fromString(stringValue);
            extension.addOrUpdateField(entry.getKey(), value);
        }
    }

    private void handleString(Extension extension, Map.Entry entry) {
        String value = ExtensionFieldType.STRING.fromString(entry.getValue().asText());
        extension.addOrUpdateField(entry.getKey(), value);
    }

    private void handleBoolean(Extension extension, Map.Entry entry) {
        Boolean value = ExtensionFieldType.BOOLEAN.fromString(entry.getValue().asText());
        extension.addOrUpdateField(entry.getKey(), value);
    }

    void setUrn(String urn) {
        this.urn = urn;
    }
}