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Struts example source code file (DefaultSettings.java)

This example Struts source code file (DefaultSettings.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Struts tags/keywords

arraylist, could, defaultsettings, defaultsettings, exception, illegalargumentexception, illegalargumentexception, iterator, logger, propertiessettings, settings, settings, string, string, util

The Struts DefaultSettings.java source code

/*
 * $Id: DefaultSettings.java 651946 2008-04-27 13:41:38Z apetrelli $
 *
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 * 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.
 */

package org.apache.struts2.config;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.StringTokenizer;

import org.apache.struts2.StrutsConstants;

import com.opensymphony.xwork2.util.logging.Logger;
import com.opensymphony.xwork2.util.logging.LoggerFactory;



/**
 * DefaultSettings implements optional methods of Settings.
 * <p>
 * This class creates and delegates to other settings by using an internal
 * {@link DelegatingSettings} object.
 */
public class DefaultSettings extends Settings {

    /**
     * The logging instance for this class.
     */
    protected Logger log = LoggerFactory.getLogger(this.getClass());

    /**
     * The Settings object that handles API calls.
     */
    Settings delegate;

    /**
     * Constructs an instance by loading the standard property files, 
     * any custom property files (<code>struts.custom.properties), 
     * and any custom message resources ().
     * <p>
     * Since this constructor  combines Settings from multiple resources,
     * it utilizes a {@link DelegatingSettings} instance,
     * and all API calls are handled by that instance.
     */
    public DefaultSettings() {

        ArrayList<Settings> list = new ArrayList();

        // stuts.properties, default.properties
        try {
            list.add(new PropertiesSettings("struts"));
        } catch (Exception e) {
            log.warn("DefaultSettings: Could not find or error in struts.properties", e);
        }

        Settings[] settings = new Settings[list.size()];
        delegate = new DelegatingSettings(list.toArray(settings));

        // struts.custom.properties
        try {
            StringTokenizer customProperties = new StringTokenizer(delegate.getImpl(StrutsConstants.STRUTS_CUSTOM_PROPERTIES), ",");

            while (customProperties.hasMoreTokens()) {
                String name = customProperties.nextToken();

                try {
                    list.add(new PropertiesSettings(name));
                } catch (Exception e) {
                    log.error("DefaultSettings: Could not find " + name + ".properties. Skipping.");
                }
            }

            settings = new Settings[list.size()];
            delegate = new DelegatingSettings(list.toArray(settings));
        } catch (IllegalArgumentException e) {
            // Assume it's OK, since IllegalArgumentException is thrown  
            // when Settings is unable to find a certain setting,
            // like the struts.custom.properties, which is commented out
        }

    }

    // See superclass for Javadoc
    public void setImpl(String name, String value) throws IllegalArgumentException, UnsupportedOperationException {
        delegate.setImpl(name, value);
    }

    // See superclass for Javadoc
    public String getImpl(String aName) throws IllegalArgumentException {
        return delegate.getImpl(aName);
    }

    // See superclass for Javadoc
    public boolean isSetImpl(String aName) {
        return delegate.isSetImpl(aName);
    }

    // See superclass for Javadoc
    public Iterator listImpl() {
        return delegate.listImpl();
    }
}

Other Struts examples (source code examples)

Here is a short list of links related to this Struts DefaultSettings.java source code file:

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