org.springframework.data.convert.JsonBooleanDeserializer.java Source code

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Here is the source code for org.springframework.data.convert.JsonBooleanDeserializer.java

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/*
 * Copyright 2015 MV Informtica.
 *
 * 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 org.springframework.data.convert;

import java.io.IOException;

import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.core.JsonToken;
import com.fasterxml.jackson.databind.DeserializationContext;
import com.fasterxml.jackson.databind.JsonDeserializer;

public class JsonBooleanDeserializer extends JsonDeserializer<Boolean> {

    protected static final String NO = "false";
    protected static final String YES = "true";

    @Override
    public Boolean deserialize(JsonParser jp, DeserializationContext ctxt) throws IOException {
        JsonToken currentToken = jp.getCurrentToken();

        if (currentToken.equals(JsonToken.VALUE_STRING)) {
            String text = jp.getText().trim();

            if (YES.equalsIgnoreCase(text)) {
                return Boolean.TRUE;
            } else if (NO.equalsIgnoreCase(text)) {
                return Boolean.FALSE;
            }

            throw ctxt.weirdStringException(text, Boolean.class,
                    "Only \"" + YES + "\" or \"" + NO + "\" values supported");
        } else if (currentToken.equals(JsonToken.VALUE_NULL)) {
            return getNullValue();
        }

        throw ctxt.mappingException(Boolean.class);
    }

    @Override
    public Boolean getNullValue() {
        return Boolean.FALSE;
    }

}