com.cedarsoftware.io.factory.StackTraceElementFactory Maven / Gradle / Ivy

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package com.cedarsoftware.io.factory;

import java.lang.reflect.Constructor;

import com.cedarsoftware.io.JsonObject;
import com.cedarsoftware.io.JsonReader;
import com.cedarsoftware.io.MetaUtils;
import com.cedarsoftware.io.Resolver;

/**
 * Factory class to create Throwable instances.  Needed for JDK17+ as the only way to set the
 * 'detailMessage' field on a Throwable is via its constructor.
 * 
 *
 * @author Kenny Partlow ([email protected])
 *         

 *         Copyright (c) Cedar Software LLC
 *         


 *         Licensed under the Apache License, Version 2.0 (the "License");
 *         you may not use this file except in compliance with the License.
 *         You may obtain a copy of the License at
 *         


 *         License
 *         


 *         Unless required by applicable law or agreed to in writing, software
 *         distributed under the License is distributed on an "AS IS" BASIS,
 *         WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *         See the License for the specific language governing permissions and
 *         limitations under the License.
 */
public class StackTraceElementFactory implements JsonReader.ClassFactory {

    public static final String DECLARING_CLASS = "declaringClass";
    public static final String METHOD_NAME = "methodName";
    public static final String FILE_NAME = "fileName";
    public static final String LINE_NUMBER = "lineNumber";
    public static final String CLASS_LOADER_NAME = "classLoaderName";
    public static final String MODULE_NAME = "moduleName";
    public static final String MODULE_VERSION = "moduleVersion";

    private static final Constructor constructor1;

    private static final Constructor constructor2;

    static {
        constructor1 = MetaUtils.safelyIgnoreException(() -> StackTraceElement.class.getConstructor(String.class, String.class, String.class, int.class), null);
        constructor2 = MetaUtils.safelyIgnoreException(() -> StackTraceElement.class.getConstructor(String.class, String.class, String.class, String.class, String.class, String.class, int.class), null);
    }

    public Object newInstance(Class c, JsonObject jObj, Resolver resolver) {
        String declaringClass = (String) jObj.get(DECLARING_CLASS);
        String methodName = (String) jObj.get(METHOD_NAME);
        String fileName = (String) jObj.get(FILE_NAME);
        Number lineNumber = (Number) jObj.get(LINE_NUMBER);

        String classLoaderName = (String) jObj.get(CLASS_LOADER_NAME);
        String moduleName = (String) jObj.get(MODULE_NAME);
        String moduleVersion = (String) jObj.get(MODULE_VERSION);

        if (constructor2 != null) {
            StackTraceElement element = MetaUtils.safelyIgnoreException(() -> (StackTraceElement) constructor2.newInstance(classLoaderName, moduleName, moduleVersion, declaringClass, methodName, fileName, lineNumber.intValue()), null);
            if (element != null) {
                return element;
            }
        }

        if (constructor1 != null) {
            StackTraceElement element = MetaUtils.safelyIgnoreException(() -> (StackTraceElement) constructor1.newInstance(declaringClass, methodName, fileName, lineNumber.intValue()), null);
            if (element != null) {
                return element;
            }
        }

        //  if the elements failed using reflection do the old version directly.
        return new StackTraceElement(declaringClass, methodName, fileName, lineNumber.intValue());
    }

    @Override
    public boolean isObjectFinal() {
        return true;
    }
}