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package com.sap.it.commons.logging;

import java.io.Serializable;

import javax.xml.bind.annotation.XmlAttribute;

import com.sap.it.commons.lang.Equals;
import com.sap.it.commons.lang.Hash;
import com.sap.it.commons.layering.Subsystem;
import com.sap.it.commons.layering.SubsystemPart;

final class MessageByText implements CategorizedMessage, Serializable {
    private static final long serialVersionUID = -8698398228783082364L;

    @XmlAttribute
    private final String subsystemName;
    @XmlAttribute
    private final String subsystemPartName;
    @XmlAttribute
    private final String messageId;
    @XmlAttribute
    private final String messageText;
    @XmlAttribute
    private final String category;

    private transient SubsystemPart ssp;

    public MessageByText(String category, String subsystemName, String subsystemPartName, String messageId, String messageText) {
        super();
        this.subsystemName = subsystemName;
        this.subsystemPartName = subsystemPartName;
        this.messageId = messageId;
        this.messageText = messageText;
        this.category = category;
    }

    public MessageByText(String subsystemName, String subsystemPartName, String messageId, String messageText) {
        super();
        this.subsystemName = subsystemName;
        this.subsystemPartName = subsystemPartName;
        this.messageId = messageId;
        this.messageText = messageText;
        this.category = null;
    }

    public MessageByText() {
        this.subsystemName = null;
        this.subsystemPartName = null;
        this.messageId = null;
        this.messageText = null;
        this.category = null;
    }

    public MessageByText(Message message) {
        SubsystemPart subsystemPart = message.getSubsystemPart();

        this.subsystemName = subsystemPart.getSubsystem().getName();
        this.subsystemPartName = subsystemPart.getName();
        this.messageId = message.getMessageId();
        this.messageText = message.getMessageText();

        MessageCategory mc = MessageTools.peekForMessageCategory(message);
        this.category = mc != null ? mc.name() : null;
    }

    @Override
    public SubsystemPart getSubsystemPart() {
        if (ssp == null) {
            ssp = new SubsystemPart() {
                private final Subsystem ss = new Subsystem() {
                    @Override
                    public String getName() {
                        return subsystemName;
                    }
                };

                @Override
                public Subsystem getSubsystem() {
                    return ss;
                }

                @Override
                public String getName() {
                    return subsystemPartName;
                }
            };
        }
        return ssp;
    }

    @Override
    public String getMessageText() {
        return messageText;
    }

    @Override
    public String getMessageId() {
        return messageId;
    }

    @Override
    public int hashCode() {
        return Hash.hash(subsystemName, subsystemPartName, messageId, category, messageText);
    }

    @Override
    public boolean equals(Object obj) {
        if (this == obj) {
            return true;
        }

        if (!(obj instanceof MessageByText)) {
            return false;
        }

        MessageByText other = (MessageByText) obj;

        return Equals.equals(subsystemName, other.subsystemName) && //
                Equals.equals(subsystemPartName, other.subsystemPartName) && //
                Equals.equals(messageId, other.messageId) && //
                Equals.equals(category, other.category) && //
                Equals.equals(messageText, other.messageText);
    }

    @Override
    public MessageCategory getMessageCategory() {
        if (category != null) {
            try {
                return MessageCategory.valueOf(category);
            } catch (IllegalArgumentException e) {
                return null;
            }
        }
        return null;
    }

}