Logback: the reliable, generic, fast and flexible logging framework.
Copyright (C) 1999-2015, QOS.ch. All rights reserved.
This program and the accompanying materials are dual-licensed under
either the terms of the Eclipse Public License v1.0 as published by
the Eclipse Foundation
  or (per the licensee's choosing)
under the terms of the GNU Lesser General Public License version 2.1
as published by the Free Software Foundation.
/**
 * Logback: the reliable, generic, fast and flexible logging framework.
 * Copyright (C) 1999-2015, QOS.ch. All rights reserved.
 *
 * This program and the accompanying materials are dual-licensed under
 * either the terms of the Eclipse Public License v1.0 as published by
 * the Eclipse Foundation
 *
 *   or (per the licensee's choosing)
 *
 * under the terms of the GNU Lesser General Public License version 2.1
 * as published by the Free Software Foundation.
 */
package ch.qos.logback.classic.spi;

import java.io.Serializable;

public class StackTraceElementProxy implements Serializable {

    private static final long serialVersionUID = -2374374378980555982L;

    final StackTraceElement ste;
    // save a byte or two during serialization, as we can
    // reconstruct this field from 'ste'
    transient private String steAsString;
    private ClassPackagingData cpd;

    public StackTraceElementProxy(StackTraceElement ste) {
        if (ste == null) {
            throw new IllegalArgumentException("ste cannot be null");
        }
        this.ste = ste;
    }

    public String getSTEAsString() {
        if (steAsString == null) {
            steAsString = "at " + ste.toString();
        }
        return steAsString;
    }

    public StackTraceElement getStackTraceElement() {
        return ste;
    }

    public void setClassPackagingData(ClassPackagingData cpd) {
        if (this.cpd != null) {
            throw new IllegalStateException("Packaging data has been already set");
        }
        this.cpd = cpd;
    }

    public ClassPackagingData getClassPackagingData() {
        return cpd;
    }

    @Override
    public int hashCode() {
        return ste.hashCode();
    }

    @Override
    public boolean equals(Object obj) {
        if (this == obj)
            return true;
        if (obj == null)
            return false;
        if (getClass() != obj.getClass())
            return false;
        final StackTraceElementProxy other = (StackTraceElementProxy) obj;

        if (!ste.equals(other.ste)) {
            return false;
        }
        if (cpd == null) {
            if (other.cpd != null) {
                return false;
            }
        } else if (!cpd.equals(other.cpd)) {
            return false;
        }
        return true;
    }

    @Override
    public String toString() {
        return getSTEAsString();
    }
}