将属性从一个bean复制到另一个Bean实现构建器模式

Question

我有bean1（Getter和Setter）有数百个属性，另有bean2（实施Builder Pattern即使用Getters和Builder Pattern）。

我想将属性从bean1复制到bean2。我该怎么做？

注意： - BeanUtils.copyProperties(source, target);没有使用Builder模式bean。

Bean1： -

package net.test.etest.dto;

import java.io.Serializable;
import java.util.List;

import org.apache.commons.lang.builder.ToStringBuilder;

import com.thoughtworks.xstream.annotations.XStreamAlias;


@XStreamAlias("POLICYDMO")
public class PolicyDTO implements Serializable {

    /**
     * 
     */
    private static final long serialVersionUID = 5293821325394812329L;  
    @XStreamAlias("POLICYKEY")
    private long policyKey;


    @XStreamAlias("ADDRESSES")
    private List<AddressDTO> addresses;
    @XStreamAlias("POLICY_INFO")
    private PolicyInfoDTO policyInfo;
    @XStreamAlias("ELIGIBILITIES")
    private List<EligibilityDTO> eligibility;
    @XStreamAlias("POLICY_AGENCY")
    private PolicyAgencyDTO policyAgency;
    @XStreamAlias("PARTICIPANTS")
    private List<ParticipantDTO> participants;
    @XStreamAlias("VEHICLES")
    private List<VehicleDTO> vehicles;
    @XStreamAlias("PREFILLEDVEHICLES")
    private List<VehicleDTO> prefilledVehicles;
    @XStreamAlias("DRIVERS")
    private List<DriverDTO> drivers;
    @XStreamAlias("PRIOR_CARRIER")
    private PriorCarrierDTO priorCarrier;   
    @XStreamAlias("DISCOUNTS")
    private List<DiscountDTO> discounts;
    @XStreamAlias("COMPANIONPOLICY")
    private CompanionPolicyDTO companionPolicy;
    @XStreamAlias("PAYMENT")
    private PaymentDTO payment;

//  @XStreamAlias("BILLING")
    //private BillingDTO billing;

    @XStreamAlias("PAYMENT_PLAN")
    private PaymentPlanDTO paymentPlan;

    @XStreamAlias("POLICYTHIRDPARTYSTATUSES")
    private List<PolicyThirdPartyDTO> policyThirdParty; 

    @XStreamAlias("UW_RULE_RESULTS")
    private List<UWRuleResultDTO> uwRuleResults;

    private String violationsCallStatus;
    private String claimsCallStatus;


    public PriorCarrierDTO getPriorCarrier() {
        return priorCarrier;
    }
    public void setPriorCarrier(PriorCarrierDTO priorCarrier) {
        this.priorCarrier = priorCarrier;
    }
    public long getPolicyKey() {
        return policyKey;
    }   
    public List<AddressDTO> getAddresses() {
        return addresses;
    }
    public PolicyInfoDTO getPolicyInfo() {
        return policyInfo;
    }
    public PaymentDTO getPayment() {
        return payment;
    }
    public void setPayment(PaymentDTO payment) {
        this.payment = payment;
    }
    public List<ParticipantDTO> getParticipants() {
        return participants;
    }
    public void setPolicyKey(long policyKey) {
        this.policyKey = policyKey;
    }   
    public void setAddresses(List<AddressDTO> addresses) {
        this.addresses = addresses;
    }
    public void setPolicyInfo(PolicyInfoDTO policyInfo) {
        this.policyInfo = policyInfo;
    }
    public void setParticipants(List<ParticipantDTO> participants) {
        this.participants = participants;
    }

    public List<VehicleDTO> getVehicles() {
        return vehicles;
    }
    public void setVehicles(List<VehicleDTO> vehicles) {
        this.vehicles = vehicles;
    }

    public List<DriverDTO> getDrivers() {
        return drivers;
    }
    public void setDrivers(List<DriverDTO> drivers) {
        this.drivers = drivers;
    }
    public List<DiscountDTO> getDiscounts() {
        return discounts;
    }
    public void setDiscounts(List<DiscountDTO> discounts) {
        this.discounts = discounts;
    }
    public CompanionPolicyDTO getCompanionPolicy() {
        return companionPolicy;
    }
    public void setCompanionPolicy(CompanionPolicyDTO companionPolicy) {
        this.companionPolicy = companionPolicy;
    }
    public PolicyAgencyDTO getPolicyAgency() {
        return policyAgency;
    }
    public void setPolicyAgency(PolicyAgencyDTO policyAgency) {
        this.policyAgency = policyAgency;
    }


    public String toString() {
        return ToStringBuilder.reflectionToString(this);
    }
    public List<EligibilityDTO> getEligibility() {
        return eligibility;
    }
    public void setEligibility(List<EligibilityDTO> eligibility) {
        this.eligibility = eligibility;
    }

    public String getEligibilityAnswerForQuestion(String question) {
        if(eligibility!=null) {
            for(EligibilityDTO e : eligibility) {
                if(e.getQuestion().equals(question)) {
                    return e.getAnswer();
                }
            }
        }
        return null;
    }
    public List<PolicyThirdPartyDTO> getPolicyThirdParty() {
        return policyThirdParty;
    }
    public void setPolicyThirdParty(List<PolicyThirdPartyDTO> policyThirdParty) {
        this.policyThirdParty = policyThirdParty;
    }
    public List<UWRuleResultDTO> getUwRuleResults() {
        return uwRuleResults;
    }
    public void setUwRuleResults(List<UWRuleResultDTO> uwRuleResults) {
        this.uwRuleResults = uwRuleResults;
    }
    public PaymentPlanDTO getPaymentPlan() {
        return paymentPlan;
    }
    public void setPaymentPlan(PaymentPlanDTO paymentPlan) {
        this.paymentPlan = paymentPlan;
    }

    /*public BillingDTO getBilling() {
        return billing;
    }
    public void setBilling(BillingDTO billing) {
        this.billing = billing;
    }*/

    public List<VehicleDTO> getPrefilledVehicles() {
        return prefilledVehicles;
    }
    public void setPrefilledVehicles(List<VehicleDTO> prefilledVehicles) {
        this.prefilledVehicles = prefilledVehicles;
    }
    public String getViolationsCallStatus() {
        return violationsCallStatus;
    }
    public void setViolationsCallStatus(String violationsCallStatus) {
        this.violationsCallStatus = violationsCallStatus;
    }
    public String getClaimsCallStatus() {
        return claimsCallStatus;
    }
    public void setClaimsCallStatus(String claimsCallStatus) {
        this.claimsCallStatus = claimsCallStatus;
    }


}

Bean2： -

package net.test.etest.services.persistence;

import java.util.ArrayList;
import java.util.List;

import net.test.etest.services.util.IBuilder;

import org.apache.commons.lang.builder.ToStringBuilder;

import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
import com.fasterxml.jackson.databind.annotation.JsonDeserialize;


@JsonDeserialize(builder = PolicyDMO.Builder.class)
public class PolicyDMO {


    private final long policyKey;   
    private final List<AddressDMO> addresses;
    private final PolicyInfoDMO policyInfo;
    private final List<EligibilityDMO> eligibility;

    private final PolicyAgencyDMO policyAgency;
    private final List<ParticipantDMO> participants;
    private final List<DriverDMO> drivers;
    private final PriorCarrier priorCarrier;
    private final List<VehicleDMO> vehicles;
    private final List<VehicleDMO> prefilledVehicles;
    private final List<DiscountDMO> discounts;
    private final CompanionPolicyDMO companionPolicy;
    private final PaymentDMO payment;
    private final List<PolicyThirdPartyDMO> policyThirdParty;

    private final List<UWRuleResultDMO> uwRuleResults;

    private final String violationsCallStatus;
    private final String claimsCallStatus;
    private final String frOrderStatus;

    public String getViolationsCallStatus() {
        return violationsCallStatus;
    }

    public String getClaimsCallStatus() {
        return claimsCallStatus;
    }

    public long getPolicyKey() {
        return policyKey;
    }   

    public List<AddressDMO> getAddresses() {
        return addresses;
    }

    public PolicyInfoDMO getPolicyInfo() {
        return policyInfo;
    }

    public List<ParticipantDMO> getParticipants() {
        return participants;
    }

    public List<DriverDMO> getDrivers() {
        return drivers;
    }

    public List<VehicleDMO> getVehicles() {
        return vehicles;
    }

    public PriorCarrier getPriorCarrier() {
        return priorCarrier;
    }

    public List<DiscountDMO> getDiscounts() {
        return discounts;
    }

    public CompanionPolicyDMO getCompanionPolicy() {
        return companionPolicy;
    }

    public PaymentDMO getPayment() {
        return payment;
    }

    private PolicyDMO(Builder builder) {

            this.policyKey = builder.policyKey;
            this.addresses = (builder.addresses != null) ? builder.addresses : builder.addresses;
            this.policyInfo = builder.policyInfo;
            this.policyAgency = builder.policyAgency;
            this.participants = (builder.participants != null) ? builder.participants : builder.participants;
            this.drivers = (builder.drivers != null) ? builder.drivers : builder.drivers;
            this.vehicles = builder.vehicles;
            this.prefilledVehicles = builder.prefilledVehicles;
            this.priorCarrier = builder.priorCarrier;
            this.discounts = builder.discounts;
            this.companionPolicy = builder.companionPolicy;
            this.payment = builder.payment;
            this.eligibility = builder.eligibility;
            this.policyThirdParty = builder.policyThirdParty;
            this.uwRuleResults = builder.uwRuleResults;
            this.violationsCallStatus = builder.violationsCallStatus;
            this.claimsCallStatus = builder.claimsCallStatus;
            this.frOrderStatus = builder.frOrderStatus;
    }

    @JsonIgnoreProperties(ignoreUnknown = true)
    public static class Builder implements IBuilder<PolicyDMO> {
        private long policyKey;
        /*
         * private String company; private String state; private String lob;
         * private String channel;
         */     
        private List<AddressDMO> addresses;
        private PolicyInfoDMO policyInfo;
        private PolicyAgencyDMO policyAgency;
        private List<ParticipantDMO> participants;
        private List<DriverDMO> drivers;
        private List<VehicleDMO> vehicles;
        private List<VehicleDMO> prefilledVehicles;
        private PriorCarrier priorCarrier;
        private List<DiscountDMO> discounts;
        private CompanionPolicyDMO companionPolicy;
        private PaymentDMO payment;
        private List<EligibilityDMO> eligibility;
        private List<PolicyThirdPartyDMO> policyThirdParty;
        private List<UWRuleResultDMO> uwRuleResults;
        private String violationsCallStatus;
        private String claimsCallStatus;
        private String frOrderStatus;

        public Builder withDrivers(List<DriverDMO> drivers) {
            this.drivers = drivers;
            return this;
        }

        public Builder withPriorCarrier(PriorCarrier priorCarrier) {
            this.priorCarrier = priorCarrier;
            return this;
        }

        public Builder withVehicles(List<VehicleDMO> vehicles) {
            this.vehicles = vehicles;
            return this;
        }

        public Builder withPrefilledVehicles(List<VehicleDMO> prefilledVehicles) {
            this.prefilledVehicles = prefilledVehicles;
            return this;
        }

        public Builder withPolicyKey(long policyKey) {
            this.policyKey = policyKey;
            return this;
        }       

        public Builder withAddresses(List<AddressDMO> addresses) {
            this.addresses = addresses;
            return this;
        }

        public Builder withPolicyInfo(PolicyInfoDMO policyInfo) {
            this.policyInfo = policyInfo;
            return this;
        }

        public Builder withPolicyAgency(PolicyAgencyDMO policyAgency) {
            this.policyAgency = policyAgency;
            return this;
        }

        public Builder withParticipants(List<ParticipantDMO> participants) {
            this.participants = participants;
            return this;
        }

        public Builder withDiscounts(List<DiscountDMO> discounts) {
            this.discounts = discounts;
            return this;
        }

        public Builder withCompanionPolicy(CompanionPolicyDMO companionPolicy) {
            this.companionPolicy = companionPolicy;
            return this;
        }

        public Builder withPayment(PaymentDMO payment) {
            this.payment = payment;
            return this;
        }

        public Builder withViolationsCallStatus(String b) {
            this.violationsCallStatus = b;
            return this;
        }

        public Builder withClaimsCallStatus(String b) {
            this.claimsCallStatus = b;
            return this;
        }

        public Builder withUWRuleResults(List<UWRuleResultDMO> uwRuleResults) {
            this.uwRuleResults = uwRuleResults;
            return this;
        }

        public Builder(PolicyDMO policyDMO) {
            this.policyKey = policyDMO.policyKey;
            this.addresses = policyDMO.addresses;
            this.policyInfo = policyDMO.policyInfo;
            this.policyAgency = policyDMO.policyAgency;
            this.participants = policyDMO.participants;
            this.drivers = policyDMO.drivers;
            this.vehicles = policyDMO.vehicles;
            this.prefilledVehicles = policyDMO.prefilledVehicles;
            this.priorCarrier = policyDMO.priorCarrier;
            this.discounts = policyDMO.discounts;
            this.companionPolicy = policyDMO.companionPolicy;
            this.payment = policyDMO.payment;
            this.eligibility = policyDMO.eligibility;
            this.policyThirdParty = policyDMO.policyThirdParty;
            this.uwRuleResults = policyDMO.uwRuleResults;
            this.violationsCallStatus = policyDMO.violationsCallStatus;
            this.claimsCallStatus = policyDMO.violationsCallStatus;
            this.frOrderStatus = policyDMO.frOrderStatus;
        }

        /* For Json deserialization */
        public Builder() {

        }

        public Builder withEligibility(List<EligibilityDMO> eligibility) {
            this.eligibility = eligibility;
            return this;
        }

        public Builder withPolicyThirdParty(List<PolicyThirdPartyDMO> policyThirdParty) {
            this.policyThirdParty = policyThirdParty;
            return this;
        }

        public Builder withUwRuleResults(List<UWRuleResultDMO> uwRuleResults) {
          this.uwRuleResults = uwRuleResults;
          return this;
        }

        public Builder withFrOrderStatus(String frOrderStatus) {
          this.frOrderStatus = frOrderStatus;
          return this;
        }

        public PolicyDMO build() {
            return new PolicyDMO(this);
        }

    }

    public PolicyAgencyDMO getPolicyAgency() {
        return policyAgency;
    }

    public String toString() {
        return ToStringBuilder.reflectionToString(this);
    }

    public List<EligibilityDMO> getEligibility() {
        return eligibility;
    }

    public List<PolicyThirdPartyDMO> getPolicyThirdParty() {
        if (policyThirdParty == null) {
            return new ArrayList<PolicyThirdPartyDMO>();
        }
        return policyThirdParty;
    }

    public List<UWRuleResultDMO> getUwRuleResults() {
        return uwRuleResults;
    }

    public List<VehicleDMO> getPrefilledVehicles() {
        return prefilledVehicles;
    }

    public String getFrOrderStatus() {
        return frOrderStatus;
    }

}

Answer 1

似乎没有任何明显更简单的方法将数据从简单的POJO复制到构建器模式bean。只有当getter和setter方法名称在两个bean中匹配时，BeanUtils.copyProperties才有效，但情况并非如此。

在构建器模式bean中添加setter方法将使其工作，但是bean不会是不可变的。它似乎没什么意义。

你可能不得不做那些复制。

Answer 2

我通过将bean1转换为JSON而不是将JSON转换回Bean2来完成解决方法。这是代码。

public static PolicyDMO createPolicyDMO(PolicyDTO policydto){

    PolicyDMO policyDMO = null;
    if (policydto != null) {
        try {
            ObjectMapper mapper = new ObjectMapper();
            mapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
            policyDMO = mapper.readValue(mapper.writeValueAsString(policydto), PolicyDMO.class);
        } catch (JsonGenerationException e)
          {
             e.printStackTrace();
          } catch (JsonMappingException e)
          {
             e.printStackTrace();
          } catch (Exception e) {

        }
    } else {
        LOGGER.error("unable to parse the object that is NULL");
    }
    return policyDMO;
}