content: /*
   *  This file is part of AndroidIDE.
   *
   *  AndroidIDE is free software: you can redistribute it and/or modify
   *  it under the terms of the GNU General Public License as published by
   *  the Free Software Foundation, either version 3 of the License, or
   *  (at your option) any later version.
   *
   *  AndroidIDE 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 for more details.
   *
   *  You should have received a copy of the GNU General Public License
   *   along with AndroidIDE.  If not, see <https://www.gnu.org/licenses/>.
   */
  
  /*
   * Copyright (c) 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 jaxp.sun.org.apache.xerces.internal.utils;
  
  import jaxp.sun.org.apache.xerces.internal.impl.Constants;
  import jaxp.xml.XMLConstants;
  
  /**
   * This class manages security related properties
   *
   */
  public final class XMLSecurityPropertyManager {
  
      /**
       * 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
      }
  
      /**
       * Limits managed by the security manager
       */
      public static enum Property {
          ACCESS_EXTERNAL_DTD(XMLConstants.ACCESS_EXTERNAL_DTD,
                  Constants.EXTERNAL_ACCESS_DEFAULT),
          ACCESS_EXTERNAL_SCHEMA(XMLConstants.ACCESS_EXTERNAL_SCHEMA,
                  Constants.EXTERNAL_ACCESS_DEFAULT);
  
          final String name;
          final String defaultValue;
  
          Property(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;
          }
      }
  
      /**
       * Values of the properties as defined in enum Properties
       */
      private final String[] values;
      /**
       * States of the settings for each property in Properties above
       */
      private State[] states = {State.DEFAULT, State.DEFAULT};
  
      /**
       * Default constructor. Establishes default values
       */
      public XMLSecurityPropertyManager() {
          values = new String[Property.values().length];
          for (Property property : Property.values()) {
              values[property.ordinal()] = property.defaultValue();
          }
          //read system properties or jaxp.properties
          readSystemProperties();
      }
  
  
      /**
       * Set limit by property name and state
       * @param propertyName property name
       * @param state the state of the property
       * @param value the value of the property
       * @return true if the property is managed by the security property manager;
       *         false if otherwise.
       */
      public boolean setValue(String propertyName, State state, Object value) {
          int index = getIndex(propertyName);
          if (index > -1) {
              setValue(index, state, (String)value);
              return true;
          }
          return false;
      }
  
      /**
       * Set the value for a specific property.
       *
       * @param property the property
       * @param state the state of the property
       * @param value the value of the property
       */
      public void setValue(Property property, State state, String value) {
          //only update if it shall override
          if (state.compareTo(states[property.ordinal()]) >= 0) {
              values[property.ordinal()] = value;
              states[property.ordinal()] = state;
          }
      }
  
      /**
       * Set the value of a property by its index
       * @param index the index of the property
       * @param state the state of the property
       * @param value the value of the property
       */
      public void setValue(int index, State state, String value) {
          //only update if it shall override
          if (state.compareTo(states[index]) >= 0) {
              values[index] = value;
              states[index] = state;
          }
      }
  
  
      /**
       * Return the value of the specified property
       *
       * @param propertyName the property name
       * @return the value of the property as a string
       */
      public String getValue(String propertyName) {
          int index = getIndex(propertyName);
          if (index > -1) {
              return getValueByIndex(index);
          }
  
          return null;
      }
  
      /**
       * Return the value of the specified property
       *
       * @param property the property
       * @return the value of the property
       */
      public String getValue(Property property) {
          return values[property.ordinal()];
      }
  
      /**
       * Return the value of a property by its ordinal
       * @param index the index of a property
       * @return value of a property
       */
      public String getValueByIndex(int index) {
          return values[index];
      }
  
      /**
       * 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 (Property property : Property.values()) {
              if (property.equalsName(propertyName)) {
                  //internally, ordinal is used as index
                  return property.ordinal();
              }
          }
          return -1;
      }
  
      /**
       * Read from system properties, or those in jaxp.properties
       */
      private void readSystemProperties() {
          getSystemProperty(Property.ACCESS_EXTERNAL_DTD,
                  Constants.SP_ACCESS_EXTERNAL_DTD);
          getSystemProperty(Property.ACCESS_EXTERNAL_SCHEMA,
                  Constants.SP_ACCESS_EXTERNAL_SCHEMA);
      }
  
      /**
       * Read from system properties, or those in jaxp.properties
       *
       * @param property the property
       * @param systemProperty the name of the system property
       */
      private void getSystemProperty(Property property, String systemProperty) {
          try {
              String value = SecuritySupport.getSystemProperty(systemProperty);
              if (value != null) {
                  values[property.ordinal()] = value;
                  states[property.ordinal()] = State.SYSTEMPROPERTY;
                  return;
              }
  
              value = SecuritySupport.readJAXPProperty(systemProperty);
              if (value != null) {
                  values[property.ordinal()] = value;
                  states[property.ordinal()] = State.JAXPDOTPROPERTIES;
              }
          } catch (NumberFormatException e) {
              //invalid setting ignored
          }
      }
  }
  