com.mokung.pomegranate.jackson.handler.getter.BooleanGetter Maven / Gradle / Ivy

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package com.mokung.pomegranate.jackson.handler.getter;

import java.util.Arrays;
import java.util.List;

import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.node.*;
import com.mokung.pomegranate.jackson.handler.Getter;

/**
 *
 * @author mokung
 */
public class BooleanGetter implements Getter {

    @Override
    public Boolean getter(JsonNode valueNode, ObjectMapper mapper, boolean cast) {
        if (valueNode instanceof BooleanNode) {
            return valueNode.asBoolean();
        }
        if (!cast || valueNode == null || valueNode instanceof NullNode) {
            return null;
        }
        if (valueNode instanceof NumericNode) {
            if (valueNode.asInt() == 1) {
                return true;
            }
            if (valueNode.asInt() == 0) {
                return false;
            }
        }
        if (valueNode instanceof TextNode) {
            String value = valueNode.asText();
            return stringToBoolean(value);
        }
        if (valueNode instanceof POJONode) {
            Object value = valueNode.asText();
            if (value == null) {
                return null;
            }
            return stringToBoolean(value.toString());
        }
        return null;
    }

    protected final List TRUE_STRING = Arrays.asList("true", "1", "Y", "T");

    protected final List FALSE_STRING = Arrays.asList("false", "0", "N", "F");

    protected Boolean stringToBoolean(String value) {
        if (value == null || value.length() <= 0 || value.trim().length() <= 0) {
            return null;
        }
        for (String trueString : TRUE_STRING) {
            if (trueString.equalsIgnoreCase(value)) {
                return Boolean.TRUE;
            }
        }
        for (String trueString : FALSE_STRING) {
            if (trueString.equalsIgnoreCase(value)) {
                return Boolean.FALSE;
            }
        }
        return null;
    }
}