使用JAXB和moxy定制枚举编组

时间:2015-07-05 12:30:54

标签: jaxb marshalling moxy

我在使用Moxy和JSON进行自定义枚举编组方面遇到了一些麻烦。我的用例是我有一个大对象模型,其中包含通常应提供正常枚举值的枚举,"代码"和描述。这些数据的来源只有"代码",所以我需要能够仅使用代码来解组​​这些枚举的实例(例如

{"companyCode":{"code":"PI"}}

但是,我也应该能够整理和解组所有三个领域:

{"companyCode":
  {"value":"Private",
  "code":"PI","description":
  "Private Ins"
  }
}


我正在使用看起来像这样的适配器:

public class CodeEnumXmlAdapter<E extends Enum<E> & CodeEnum> extends XmlAdapter<CodeEnumImpl,E> {

    public static <T extends Enum<T> & CodeEnum> T getFromName(Class<T> clazz, String name) {
        if (name == null) return null;

        T[] values = clazz.getEnumConstants();

        for (T t : values) {
            if (name.equals(t.name())) {
                return t;
            }
        }

        return null;
    }
    public static <T extends Enum<T> & CodeEnum> T getFromCode(Class<T> clazz, String code) {
        if (code == null) return null;

        T[] values = clazz.getEnumConstants();

        for (T t : values) {
            if (code.equals(t.getCode())) {
                return t;
            }
        }

        return null;
    }
    public static <T extends Enum<T> & CodeEnum> T getFromString(Class<T> clazz, String aString) {
        if (aString == null) return null;

        T[] values = clazz.getEnumConstants();

        for (T t : values) {
            if (aString.equals(t.getCode()) || aString.equals(t.name()) || aString.equals(t.getDescription())) {
                return t;
            }
        }

        return null;
    }

    @Override
    public E unmarshal(CodeEnumImpl value) throws Exception {
        if (value == null) return null;

        String valueString = value.getValue();
        if (valueString == null)
            valueString = value.getCode();
        if (valueString == null)
            valueString = value.getDescription();
        if (valueString == null)
            return null;

        Type generic = ((ParameterizedType)getClass().getGenericSuperclass()).getActualTypeArguments()[0];
        return getFromString((Class<E>)generic, valueString);
    }

    @Override
    public CodeEnumImpl marshal(E value) throws Exception {
        return value == null ? null : new CodeEnumImpl(value);
    }
}

这会从这样的枚举中转换出来:

import org.apache.commons.lang3.StringUtils;

import javax.xml.bind.annotation.adapters.XmlJavaTypeAdapter;

@XmlJavaTypeAdapter(CompanyCode.Adapter.class)
public enum CompanyCode implements CodeEnum {

    // Changed "Commmercial" to "Client" based on inputs from ...Greg, Tamil
    Client("CM", "Client"), Medicare("MC", "Medicare"), Medicaid("MD",
            "Medicaid"), Private("PI", "Private Ins"), Patient("PT", "Patient");

    private String code;
    private String description;

    private CompanyCode(String code, String label) {
        this.code = code;
        this.description = label;
    }

    public String getDescription() {
        return description;
    }

    public String getCode() {
        return code;
    }

    public static CompanyCode fromCode(String code) {
        if (StringUtils.isEmpty(code)) {
            return null;
        }

        for (CompanyCode freq : values()) {
            if (freq.getCode().equalsIgnoreCase(code)) {
                return freq;
            }
        }
        throw new IllegalArgumentException("Invalid CompanyCode code: " + code);
    }

    public String toString() {
        return description;
    }

    public static class Adapter extends CodeEnumXmlAdapter<CompanyCode> {}
}

并使用和这样的中间类型:

import javax.xml.bind.annotation.XmlElement;

/**
 * Created by Jeffrey Hoffman on 6/24/2015.
 */
public class CodeEnumImpl  {
    String value;
    String description;
    String code;

    public CodeEnumImpl() {

    }
    public <E extends Enum<E> & CodeEnum> CodeEnumImpl(E value) {
        if (value != null) {
            this.value = value.name();
            this.description = value.getDescription();
            this.code = value.getCode();
        }
    }

    @XmlElement
    public String getValue() {
        return value;
    }

    public void setValue(String value) {
        this.value = value;
    }

    @XmlElement
    public String getDescription() {
        return description;
    }

    public void setDescription(String description) {
        this.description = description;
    }

    @XmlElement
    public String getCode() {
        return code;
    }

    public void setCode(String code) {
        this.code = code;
    }

    @Override
    public String toString() {
        return value == null ? null : value.toString();
    }
}

这适用于直接XML和JAXB。但是,当我尝试使用Moxy时,我得到一个像这样的例外:

  

异常描述:类[类的私有Ins]   com.labcorp.phoenix.biz.enums.CompanyCode],无法转换为   [类java.lang.Object]。内部例外:例外   [EclipseLink-115](Eclipse持久性服务 -   2.5.0.v20130507-3faac2b):org.eclipse.persistence.exceptions.DescriptorException异常   描述:没有为属性[Private]提供转换值。   制图:   org.eclipse.persistence.oxm.mappings.XMLDirectMapping [企业编码 - &GT;企业编码/文本()]   描述符:XMLDescriptor(com.labcorp.phoenix.eligibility.Root - &gt;   [DatabaseTable(root)])at   org.eclipse.persistence.exceptions.ConversionException.couldNotBeConverted(ConversionException.java:87)     在   org.eclipse.persistence.internal.jaxb.XMLJavaTypeConverter.convertObjectValueToDataValue(XMLJavaTypeConverter.java:178)     在   org.eclipse.persistence.oxm.mappings.XMLDirectMapping.convertObjectValueToDataValue(XMLDirectMapping.java:511)     在   org.eclipse.persistence.oxm.mappings.XMLDirectMapping.getFieldValue(XMLDirectMapping.java:330)     在   org.eclipse.persistence.internal.oxm.XMLDirectMappingNodeValue.marshalSingleValue(XMLDirectMappingNodeValue.java:62)     在   org.eclipse.persistence.internal.oxm.XMLDirectMappingNodeValue.marshal(XMLDirectMappingNodeValue.java:58)     在   org.eclipse.persistence.internal.oxm.NodeValue.marshal(NodeValue.java:102)     在   org.eclipse.persistence.internal.oxm.record.ObjectMarshalContext.marshal(ObjectMarshalContext.java:59)     在   org.eclipse.persistence.internal.oxm.XPathNode.marshal(XPathNode.java:393)     在   org.eclipse.persistence.internal.oxm.XPathNode.marshal(XPathNode.java:368)     在   org.eclipse.persistence.internal.oxm.XPathObjectBuilder.buildRow(XPathObjectBuilder.java:238)     在   org.eclipse.persistence.internal.oxm.TreeObjectBuilder.buildRow(TreeObjectBuilder.java:118)     在   org.eclipse.persistence.internal.oxm.TreeObjectBuilder.buildRow(TreeObjectBuilder.java:1)     在   org.eclipse.persistence.internal.oxm.XMLMarshaller.marshal(XMLMarshaller.java:743)     在   org.eclipse.persistence.internal.oxm.XMLMarshaller.marshal(XMLMarshaller.java:1124)     在   org.eclipse.persistence.internal.oxm.XMLMarshaller.marshal(XMLMarshaller.java:869)     ... 7更多引起:异常[EclipseLink-115](Eclipse   持久性服务 - 2.5.0.v20130507-3faac2b):   org.eclipse.persistence.exceptions.DescriptorException

这似乎是moxy中的一个错误,因为我的适配器会转换为非枚举类型,所以不应该有一个处理枚举的nestedConverter。

1 个答案:

答案 0 :(得分:2)

我设法用2.5.0重现你的问题。它最可能已经修复过的bug。无法在Eclipse Bugzilla中找到错误,但相同的代码可以在2.6.0中正常运行。你能升级到最新的MOXy吗?