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Java example source code file (FeatureManager.java)

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

Learn more about this Java project at its project page.

Java - Java tags/keywords

apiproperty, default, feature, featuremanager, featurepropertybase, fsp, jaxpdotproperties, state, string, systemproperty

The FeatureManager.java Java example source code

/*
 * Copyright (c) 2011, 2013, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

package com.sun.org.apache.xalan.internal.utils;


import com.sun.org.apache.xalan.internal.XalanConstants;

/**
 * This class manages security related properties
 *
 */
public final class FeatureManager extends FeaturePropertyBase {

    /**
     * States of the settings of a property, in the order: default value, value
     * set by FEATURE_SECURE_PROCESSING, jaxp.properties file, jaxp system
     * properties, and jaxp api properties
     */
    public static enum State {
        //this order reflects the overriding order
        DEFAULT, FSP, JAXPDOTPROPERTIES, SYSTEMPROPERTY, APIPROPERTY
    }

    /**
     * Xalan Features
     */
    public static enum Feature {
        ORACLE_ENABLE_EXTENSION_FUNCTION(XalanConstants.ORACLE_ENABLE_EXTENSION_FUNCTION,
                "true");

        final String name;
        final String defaultValue;

        Feature(String name, String value) {
            this.name = name;
            this.defaultValue = value;
        }

        public boolean equalsName(String propertyName) {
            return (propertyName == null) ? false : name.equals(propertyName);
        }

        String defaultValue() {
            return defaultValue;
        }
    }

    /**
     * Default constructor. Establishes default values
     */
    public FeatureManager() {
        values = new String[Feature.values().length];
        for (Feature feature : Feature.values()) {
            values[feature.ordinal()] = feature.defaultValue();
        }
        //read system properties or jaxp.properties
        readSystemProperties();
    }


    /**
     * Check if the feature is enabled
     * @param feature name of the feature
     * @return true if enabled, false otherwise
     */
    public boolean isFeatureEnabled(Feature feature) {
        return Boolean.parseBoolean(values[feature.ordinal()]);
    }

    /**
     * Check if the feature is enabled
     * @param propertyName name of the feature
     * @return true if enabled, false otherwise
     */
    public boolean isFeatureEnabled(String propertyName) {
        return Boolean.parseBoolean(values[getIndex(propertyName)]);
    }

    /**
     * Get the index by property name
     * @param propertyName property name
     * @return the index of the property if found; return -1 if not
     */
    public int getIndex(String propertyName){
        for (Feature feature : Feature.values()) {
            if (feature.equalsName(propertyName)) {
                return feature.ordinal();
            }
        }
        return -1;
    }

    /**
     * Read from system properties, or those in jaxp.properties
     */
    private void readSystemProperties() {
        getSystemProperty(Feature.ORACLE_ENABLE_EXTENSION_FUNCTION,
                XalanConstants.SP_ORACLE_ENABLE_EXTENSION_FUNCTION);
    }

}

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