net.imadz.meta.impl.MetaDataError Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of Lifecycle Show documentation

Lifecycle AOP Framework. Enabling describe enhanced State Diagram with Java language, and processing relational Lifecycle constraints(including: state validations, transitions validations), concurrency, lifecycle callbacks, lifecycle events implicitely with Lifecycle Engine. This engine can be used by class load time (Java Instrumentation) or compile time (Lifecycle-StaticWeaver-maven-plugin).

There is a newer version: 0.9.13

Show newest version

/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 * 
 * Copyright (c) 2013-2020 Madz. All rights reserved.
 * 
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License"). You
 * may not use this file except in compliance with the License. You can
 * obtain a copy of the License at
 * https://raw.github.com/zhongdj/Lifecycle/master/License.txt
 * . See the License for the specific
 * language governing permissions and limitations under the License.
 * 
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at packager/legal/LICENSE.txt.
 * 
 * Modifications:
 * If applicable, add the following below the License Header, with the fields
 * enclosed by brackets [] replaced by your own identifying information:
 * "Portions Copyright [year] [name of copyright owner]"
 * 
 * Contributor(s):
 * If you wish your version of this file to be governed by only the CDDL or
 * only the GPL Version 2, indicate your decision by adding "[Contributor]
 * elects to include this software in this distribution under the [CDDL or GPL
 * Version 2] license." If you don't indicate a single choice of license, a
 * recipient has the option to distribute your version of this file under
 * either the CDDL, the GPL Version 2 or to extend the choice of license to
 * its licensees as provided above. However, if you add GPL Version 2 code
 * and therefore, elected the GPL Version 2 license, then the option applies
 * only if the new code is made subject to such option by the copyright
 * holder.
 */
package net.imadz.meta.impl;

import java.io.ByteArrayOutputStream;
import java.io.PrintStream;
import java.lang.reflect.InvocationTargetException;
import java.util.Collections;
import java.util.LinkedList;
import java.util.List;

import net.imadz.meta.FlavorMetaData;
import net.imadz.meta.KeySet;
import net.imadz.meta.MetaData;
import net.imadz.meta.MetaDataFilter;

/**
 * Special Handler that records errors encountered during meta-data processing.
 * 
 * This class is instantiated automatically by the MetaDataHandlerMap
 * class.
 */
public class MetaDataError implements FlavorMetaData {

    private final LinkedList errors = new LinkedList();
    private final static KeySet KEY_SET = new KeySet(MetaDataError.class);

    /**
     * Default constructor
     */
    public MetaDataError() {}

    @Override
    public KeySet getKeySet() {
        return KEY_SET;
    }

    /**
     * Add an error to the error list
     */
    public void addError(Throwable e) {
        // Flatten exceptions caused by reflection
        while ( e instanceof InvocationTargetException ) {
            e = ( (InvocationTargetException) e ).getTargetException();
        }
        if ( e instanceof IllegalStateException ) {
            errors.add(e.getMessage());
        } else {
            ByteArrayOutputStream out = new ByteArrayOutputStream();
            PrintStream pout = new PrintStream(out);
            e.printStackTrace(pout);
            errors.add(out.toString());
        }
    }

    /**
     * List of all error messages
     * 
     * @return List of all error strings
     */
    public List getErrors() {
        return Collections.unmodifiableList(this.errors);
    }

    @Override
    public String toString() {
        return "Errors" + errors;
    }

    @Override
    public MetaDataError filter(MetaData owner, MetaDataFilter filter, boolean lazyFilter) {
        return this;
    }
}