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) 2003, 2013, Oracle and/or its affiliates. All rights reserved.
   */
  
  /*
   * Copyright 2005 The Apache Software Foundation.
   *
   * 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
   *
   *      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 jaxp.sun.org.apache.xerces.internal.impl;
  
  import jaxp.sun.org.apache.xerces.internal.parsers.AbstractDOMParser;
  
  import java.util.Enumeration;
  import java.util.NoSuchElementException;
  
  /**
   * Commonly used constants.
   *
   * @xerces.internal
   *
   * @author Andy Clark, IBM
   *
   * @version $Id: Constants.java,v 1.14 2010-11-01 04:39:40 joehw Exp $
   */
  public final class Constants {
  
      //
      // Constants
      //
      // Schema Types:
      public static final String NS_XMLSCHEMA = "http://www.w3.org/2001/XMLSchema".intern();
      public static final String NS_DTD = "http://www.w3.org/TR/REC-xml".intern();
  
      // Schema features
      public static final String SUN_SCHEMA_FEATURE_PREFIX = "http://java.sun.com/xml/schema/features/";
      public static final String SUN_REPORT_IGNORED_ELEMENT_CONTENT_WHITESPACE = "report-ignored-element-content-whitespace";
  
      //stax properties
  
      public static final String ZEPHYR_PROPERTY_PREFIX = "http://java.sun.com/xml/stream/properties/" ;
      public static final String STAX_PROPERTIES = "stax-properties" ;
      public static final String STAX_ENTITY_RESOLVER_PROPERTY = "internal/stax-entity-resolver";
      public static final String STAX_REPORT_CDATA_EVENT = "report-cdata-event";
      public static final String READER_IN_DEFINED_STATE = ZEPHYR_PROPERTY_PREFIX + "reader-in-defined-state" ;
      public static final String ADD_NAMESPACE_DECL_AS_ATTRIBUTE = "add-namespacedecl-as-attrbiute";
      public static final String ESCAPE_CHARACTERS = "escapeCharacters";
      public static final String REUSE_INSTANCE = "reuse-instance" ;
  
      //DOM properties
      public static final String SUN_DOM_PROPERTY_PREFIX = "http://java.sun.com/xml/dom/properties/" ;
      public static final String SUN_DOM_ANCESTOR_CHECCK = "ancestor-check";
  
      /**
       * If true, ignore DOCTYPE declaration as if it wasn't present at all.
       * Note that this is a violation of the XML recommendation.
       * The full property name is prefixed by {@link #ZEPHYR_PROPERTY_PREFIX}.
       */
      public static final String IGNORE_EXTERNAL_DTD = "ignore-external-dtd";
  
      // sax features
  
      /** SAX feature prefix ("http://xml.org/sax/features/"). */
      public static final String SAX_FEATURE_PREFIX = "http://xml.org/sax/features/";
  
      public static final String NAMESPACES_FEATURE = "namespaces";
  
      /** Namespace prefixes feature ("namespace-prefixes"). */
      public static final String NAMESPACE_PREFIXES_FEATURE = "namespace-prefixes";
  
      /** String interning feature ("string-interning"). */
      public static final String STRING_INTERNING_FEATURE = "string-interning";
  
      /** Validation feature ("validation"). */
      public static final String VALIDATION_FEATURE = "validation";
  
      /** External general entities feature ("external-general-entities "). */
      public static final String EXTERNAL_GENERAL_ENTITIES_FEATURE = "external-general-entities";
  
      /** External parameter entities feature ("external-parameter-entities "). */
      public static final String EXTERNAL_PARAMETER_ENTITIES_FEATURE = "external-parameter-entities";
  
      /** Lexical handler parameter entities feature ("lexical-handler/parameter-entities"). */
      public static final String LEXICAL_HANDLER_PARAMETER_ENTITIES_FEATURE = "lexical-handler/parameter-entities";
  
      /** Is standalone feature ("is-standalone"). */
      public static final String IS_STANDALONE_FEATURE = "is-standalone";
  
      /** Resolve DTD URIs feature ("resolve-dtd-uris"). */
      public static final String RESOLVE_DTD_URIS_FEATURE = "resolve-dtd-uris";
  
      /** Use Attributes2 feature ("use-attributes2"). */
      public static final String USE_ATTRIBUTES2_FEATURE = "use-attributes2";
  
      /** Use Locator2 feature ("use-locator2"). */
      public static final String USE_LOCATOR2_FEATURE = "use-locator2";
  
      /** Use EntityResolver2 feature ("use-entity-resolver2"). */
      public static final String USE_ENTITY_RESOLVER2_FEATURE = "use-entity-resolver2";
  
      /** Unicode normalization checking feature ("unicode-normalization-checking"). */
      public static final String UNICODE_NORMALIZATION_CHECKING_FEATURE = "unicode-normalization-checking";
  
      /** xmlns URIs feature ("xmlns-uris"). */
      public static final String XMLNS_URIS_FEATURE = "xmlns-uris";
  
      /** XML 1.1 feature ("xml-1.1"). */
      public static final String XML_11_FEATURE = "xml-1.1";
  
      /** Allow unparsed entity and notation declaration events to be sent after the end DTD event ("allow-dtd-events-after-endDTD") */
      public static final String ALLOW_DTD_EVENTS_AFTER_ENDDTD_FEATURE = "allow-dtd-events-after-endDTD";
  
      // sax properties
  
      /** SAX property prefix ("http://xml.org/sax/properties/"). */
      public static final String SAX_PROPERTY_PREFIX = "http://xml.org/sax/properties/";
  
      /** Declaration handler property ("declaration-handler"). */
      public static final String DECLARATION_HANDLER_PROPERTY = "declaration-handler";
  
      /** Lexical handler property ("lexical-handler"). */
      public static final String LEXICAL_HANDLER_PROPERTY = "lexical-handler";
  
      /** DOM node property ("dom-node"). */
      public static final String DOM_NODE_PROPERTY = "dom-node";
  
      /** XML string property ("xml-string"). */
      public static final String XML_STRING_PROPERTY = "xml-string";
  
      public static final String FEATURE_SECURE_PROCESSING = "http://javax.xml.XMLConstants/feature/secure-processing";
  
      // Oracle Feature:
      /**
       * <p>Use Service Mechanism</p>
       *
       * <ul>
       *   <li>
       * {@code true} instruct an object to use service mechanism to
       * find a service implementation. This is the default behavior.
       *   </li>
       *   <li>
       * {@code false} instruct an object to skip service mechanism and
       * use the default implementation for that service.
       *   </li>
       * </ul>
       */
      public static final String ORACLE_FEATURE_SERVICE_MECHANISM = "http://www.oracle.com/feature/use-service-mechanism";
  
      /** Document XML version property ("document-xml-version"). */
      public static final String DOCUMENT_XML_VERSION_PROPERTY = "document-xml-version";
  
  
      //
      // JAXP properties
      //
  
      /** JAXP property prefix ("http://java.sun.com/xml/jaxp/properties/"). */
      public static final String JAXP_PROPERTY_PREFIX =
          "http://java.sun.com/xml/jaxp/properties/";
  
      /** JAXP schemaSource property: when used internally may include DTD sources (DOM) */
      public static final String SCHEMA_SOURCE = "schemaSource";
  
      /** JAXP schemaSource language: when used internally may include DTD namespace (DOM) */
      public static final String SCHEMA_LANGUAGE = "schemaLanguage";
  
      /** JAXP Standard property prefix ("http://javax.xml.XMLConstants/property/"). */
      public static final String JAXPAPI_PROPERTY_PREFIX =
          "http://javax.xml.XMLConstants/property/";
  
      /** Oracle JAXP property prefix ("http://www.oracle.com/xml/jaxp/properties/"). */
      public static final String ORACLE_JAXP_PROPERTY_PREFIX =
          "http://www.oracle.com/xml/jaxp/properties/";
  
      public static final String XML_SECURITY_PROPERTY_MANAGER =
              ORACLE_JAXP_PROPERTY_PREFIX + "xmlSecurityPropertyManager";
  
      //System Properties corresponding to ACCESS_EXTERNAL_* properties
      public static final String SP_ACCESS_EXTERNAL_DTD = "javax.xml.accessExternalDTD";
      public static final String SP_ACCESS_EXTERNAL_SCHEMA = "javax.xml.accessExternalSchema";
      //all access keyword
      public static final String ACCESS_EXTERNAL_ALL = "all";
  
      /**
       * Default value when FEATURE_SECURE_PROCESSING (FSP) is set to true
       */
      public static final String EXTERNAL_ACCESS_DEFAULT_FSP = "";
  
      /**
       * FEATURE_SECURE_PROCESSING (FSP) is true by default
       */
      public static final String EXTERNAL_ACCESS_DEFAULT = ACCESS_EXTERNAL_ALL;
  
      /**
       * Check if we're in jdk8 or above
       */
      public static final boolean IS_JDK8_OR_ABOVE = isJavaVersionAtLeast(8);
  
      //
      // Implementation limits: corresponding System Properties of the above
      // API properties
      //
      /**
       * JDK entity expansion limit; Note that the existing system property
       * "entityExpansionLimit" with no prefix is still observed
       */
      public static final String JDK_ENTITY_EXPANSION_LIMIT =
              ORACLE_JAXP_PROPERTY_PREFIX + "entityExpansionLimit";
  
      /**
       * JDK element attribute limit; Note that the existing system property
       * "elementAttributeLimit" with no prefix is still observed
       */
      public static final String JDK_ELEMENT_ATTRIBUTE_LIMIT =
              ORACLE_JAXP_PROPERTY_PREFIX + "elementAttributeLimit";
  
      /**
       * JDK maxOccur limit; Note that the existing system property
       * "maxOccurLimit" with no prefix is still observed
       */
      public static final String JDK_MAX_OCCUR_LIMIT =
              ORACLE_JAXP_PROPERTY_PREFIX + "maxOccurLimit";
  
      /**
       * JDK total entity size limit
       */
      public static final String JDK_TOTAL_ENTITY_SIZE_LIMIT =
              ORACLE_JAXP_PROPERTY_PREFIX + "totalEntitySizeLimit";
  
      /**
       * JDK maximum general entity size limit
       */
      public static final String JDK_GENERAL_ENTITY_SIZE_LIMIT =
              ORACLE_JAXP_PROPERTY_PREFIX + "maxGeneralEntitySizeLimit";
      /**
       * JDK maximum parameter entity size limit
       */
      public static final String JDK_PARAMETER_ENTITY_SIZE_LIMIT =
              ORACLE_JAXP_PROPERTY_PREFIX + "maxParameterEntitySizeLimit";
      /**
       * JDK maximum XML name limit
       */
      public static final String JDK_XML_NAME_LIMIT =
              ORACLE_JAXP_PROPERTY_PREFIX + "maxXMLNameLimit";
      /**
       * JDK property to allow printing out information from the limit analyzer
       */
      public static final String JDK_ENTITY_COUNT_INFO =
              ORACLE_JAXP_PROPERTY_PREFIX + "getEntityCountInfo";
  
      //
      // Implementation limits: API properties
      //
      /**
       * JDK entity expansion limit; Note that the existing system property
       * "entityExpansionLimit" with no prefix is still observed
       */
      public static final String SP_ENTITY_EXPANSION_LIMIT = "jdk.xml.entityExpansionLimit";
  
      /**
       * JDK element attribute limit; Note that the existing system property
       * "elementAttributeLimit" with no prefix is still observed
       */
      public static final String SP_ELEMENT_ATTRIBUTE_LIMIT =  "jdk.xml.elementAttributeLimit";
  
      /**
       * JDK maxOccur limit; Note that the existing system property
       * "maxOccurLimit" with no prefix is still observed
       */
      public static final String SP_MAX_OCCUR_LIMIT = "jdk.xml.maxOccurLimit";
  
      /**
       * JDK total entity size limit
       */
      public static final String SP_TOTAL_ENTITY_SIZE_LIMIT = "jdk.xml.totalEntitySizeLimit";
  
      /**
       * JDK maximum general entity size limit
       */
      public static final String SP_GENERAL_ENTITY_SIZE_LIMIT = "jdk.xml.maxGeneralEntitySizeLimit";
      /**
       * JDK maximum parameter entity size limit
       */
      public static final String SP_PARAMETER_ENTITY_SIZE_LIMIT = "jdk.xml.maxParameterEntitySizeLimit";
      /**
       * JDK maximum XML name limit
       */
      public static final String SP_XML_NAME_LIMIT = "jdk.xml.maxXMLNameLimit";
  
      //legacy System Properties
      public final static String ENTITY_EXPANSION_LIMIT = "entityExpansionLimit";
      public static final String ELEMENT_ATTRIBUTE_LIMIT = "elementAttributeLimit" ;
      public final static String MAX_OCCUR_LIMIT = "maxOccurLimit";
  
      /**
       * A string "yes" that can be used for properties such as getEntityCountInfo
       */
      public static final String JDK_YES = "yes";
  
      //
      // DOM features
      //
  
      /** Comments feature ("include-comments"). */
      public static final String INCLUDE_COMMENTS_FEATURE = "include-comments";
  
      /** Create cdata nodes feature ("create-cdata-nodes"). */
      public static final String CREATE_CDATA_NODES_FEATURE = "create-cdata-nodes";
  
      /** Feature id: load as infoset. */
      public static final String LOAD_AS_INFOSET = "load-as-infoset";
  
  
      //
      // Constants: DOM Level 3 feature ids
      //
  
      public static final String DOM_CANONICAL_FORM = "canonical-form";
      public static final String DOM_CDATA_SECTIONS ="cdata-sections";
  
      public static final String DOM_COMMENTS = "comments";
  
      // REVISIT: this feature seems to have no effect for Xerces
  
      public static final String DOM_CHARSET_OVERRIDES_XML_ENCODING =
      "charset-overrides-xml-encoding";
  
      public static final String DOM_DATATYPE_NORMALIZATION = "datatype-normalization";
  
      public static final String DOM_ENTITIES = "entities";
      public static final String DOM_INFOSET = "infoset";
      public static final String DOM_NAMESPACES = "namespaces";
      public static final String DOM_NAMESPACE_DECLARATIONS = "namespace-declarations";
      public static final String DOM_SUPPORTED_MEDIATYPES_ONLY =
          "supported-media-types-only";
  
      public static final String DOM_VALIDATE_IF_SCHEMA = "validate-if-schema";
      public static final String DOM_VALIDATE = "validate";
      public static final String DOM_ELEMENT_CONTENT_WHITESPACE =
          "element-content-whitespace";
  
      // DOM Level 3 features defined in Core:
      public static final String DOM_DISCARD_DEFAULT_CONTENT = "discard-default-content";
      public static final String DOM_NORMALIZE_CHARACTERS    = "normalize-characters";
      public static final String DOM_CHECK_CHAR_NORMALIZATION  = "check-character-normalization";
      public static final String DOM_WELLFORMED  = "well-formed";
      public static final String DOM_SPLIT_CDATA = "split-cdata-sections";
  
      // Load and Save
      public static final String DOM_FORMAT_PRETTY_PRINT = "format-pretty-print";
      public static final String DOM_XMLDECL = "xml-declaration";
      public static final String DOM_UNKNOWNCHARS = "unknown-characters";
      public static final String DOM_CERTIFIED =  "certified";
      public static final String DOM_DISALLOW_DOCTYPE =  "disallow-doctype";
      public static final String DOM_IGNORE_UNKNOWN_CHARACTER_DENORMALIZATIONS =  "ignore-unknown-character-denormalizations";
  
      // DOM Properties
      public static final String DOM_RESOURCE_RESOLVER = "resource-resolver";
      public static final String DOM_ERROR_HANDLER = "error-handler";
      public static final String DOM_SCHEMA_TYPE = "schema-type";
      public static final String DOM_SCHEMA_LOCATION = "schema-location";
      public static final String DOM_ANCESTOR_CHECCK = "ancestor-check";
      // XSModel
      public static final String DOM_PSVI = "psvi";
  
  
      // xerces features
  
      /** Xerces features prefix ("http://apache.org/xml/features/"). */
      public static final String XERCES_FEATURE_PREFIX = "http://apache.org/xml/features/";
  
      /** Schema validation feature ("validation/schema"). */
      public static final String SCHEMA_VALIDATION_FEATURE = "validation/schema";
  
      /** Expose schema normalized values */
      public static final String SCHEMA_NORMALIZED_VALUE = "validation/schema/normalized-value";
  
      /** Send schema default value via characters() */
      public static final String SCHEMA_ELEMENT_DEFAULT = "validation/schema/element-default";
  
      /** Schema full constraint checking ("validation/schema-full-checking"). */
      public static final String SCHEMA_FULL_CHECKING = "validation/schema-full-checking";
  
      /** Augment Post-Schema-Validation-Infoset */
      public static final String SCHEMA_AUGMENT_PSVI = "validation/schema/augment-psvi";
  
      /** Dynamic validation feature ("validation/dynamic"). */
      public static final String DYNAMIC_VALIDATION_FEATURE = "validation/dynamic";
  
      /** Warn on duplicate attribute declaration feature ("validation/warn-on-duplicate-attdef"). */
      public static final String WARN_ON_DUPLICATE_ATTDEF_FEATURE = "validation/warn-on-duplicate-attdef";
  
      /** Warn on undeclared element feature ("validation/warn-on-undeclared-elemdef"). */
      public static final String WARN_ON_UNDECLARED_ELEMDEF_FEATURE = "validation/warn-on-undeclared-elemdef";
  
      /** Warn on duplicate entity declaration feature ("warn-on-duplicate-entitydef"). */
      public static final String WARN_ON_DUPLICATE_ENTITYDEF_FEATURE = "warn-on-duplicate-entitydef";
  
      /** Allow Java encoding names feature ("allow-java-encodings"). */
      public static final String ALLOW_JAVA_ENCODINGS_FEATURE = "allow-java-encodings";
  
      /** Disallow DOCTYPE declaration feature ("disallow-doctype-decl"). */
      public static final String DISALLOW_DOCTYPE_DECL_FEATURE = "disallow-doctype-decl";
  
      /** Continue after fatal error feature ("continue-after-fatal-error"). */
      public static final String CONTINUE_AFTER_FATAL_ERROR_FEATURE = "continue-after-fatal-error";
  
      /** Load dtd grammar when nonvalidating feature ("nonvalidating/load-dtd-grammar"). */
      public static final String LOAD_DTD_GRAMMAR_FEATURE = "nonvalidating/load-dtd-grammar";
  
      /** Load external dtd when nonvalidating feature ("nonvalidating/load-external-dtd"). */
      public static final String LOAD_EXTERNAL_DTD_FEATURE = "nonvalidating/load-external-dtd";
  
      /** Defer node expansion feature ("dom/defer-node-expansion"). */
      public static final String DEFER_NODE_EXPANSION_FEATURE = "dom/defer-node-expansion";
  
      /** Create entity reference nodes feature ("dom/create-entity-ref-nodes"). */
      public static final String CREATE_ENTITY_REF_NODES_FEATURE = "dom/create-entity-ref-nodes";
  
      /** Include ignorable whitespace feature ("dom/include-ignorable-whitespace"). */
      public static final String INCLUDE_IGNORABLE_WHITESPACE = "dom/include-ignorable-whitespace";
  
      /** Default attribute values feature ("validation/default-attribute-values"). */
      public static final String DEFAULT_ATTRIBUTE_VALUES_FEATURE = "validation/default-attribute-values";
  
      /** Validate content models feature ("validation/validate-content-models"). */
      public static final String VALIDATE_CONTENT_MODELS_FEATURE = "validation/validate-content-models";
  
      /** Validate datatypes feature ("validation/validate-datatypes"). */
      public static final String VALIDATE_DATATYPES_FEATURE = "validation/validate-datatypes";
  
      /** Balance syntax trees feature ("validation/balance-syntax-trees"). */
      public static final String BALANCE_SYNTAX_TREES = "validation/balance-syntax-trees";
  
      /** Notify character references feature (scanner/notify-char-refs"). */
      public static final String NOTIFY_CHAR_REFS_FEATURE = "scanner/notify-char-refs";
  
      /** Notify built-in (&amp;amp;, etc.) references feature (scanner/notify-builtin-refs"). */
      public static final String NOTIFY_BUILTIN_REFS_FEATURE = "scanner/notify-builtin-refs";
  
      /** Standard URI conformant feature ("standard-uri-conformant"). */
      public static final String STANDARD_URI_CONFORMANT_FEATURE = "standard-uri-conformant";
  
      /** Generate synthetic annotations feature ("generate-synthetic-annotations"). */
      public static final String GENERATE_SYNTHETIC_ANNOTATIONS_FEATURE = "generate-synthetic-annotations";
  
      /** Validate annotations feature ("validate-annotations"). */
      public static final String VALIDATE_ANNOTATIONS_FEATURE = "validate-annotations";
  
  
          /** Honour all schemaLocations feature ("honour-all-schemaLocations"). */
      public static final String HONOUR_ALL_SCHEMALOCATIONS_FEATURE = "honour-all-schemaLocations";
  
      /** Namespace growth feature ("namespace-growth"). */
      public static final String NAMESPACE_GROWTH_FEATURE = "namespace-growth";
  
      /** Tolerate duplicates feature ("internal/tolerate-duplicates"). */
      public static final String TOLERATE_DUPLICATES_FEATURE = "internal/tolerate-duplicates";
  
      /** XInclude processing feature ("xinclude"). */
      public static final String XINCLUDE_FEATURE = "xinclude";
  
      /** XInclude fixup base URIs feature ("xinclude/fixup-base-uris"). */
      public static final String XINCLUDE_FIXUP_BASE_URIS_FEATURE = "xinclude/fixup-base-uris";
  
      /** XInclude fixup language feature ("xinclude/fixup-language"). */
      public static final String XINCLUDE_FIXUP_LANGUAGE_FEATURE = "xinclude/fixup-language";
  
      /**
       * Internal feature. When set to true the schema validator will only use
       * schema components from the grammar pool provided.
       */
      public static final String USE_GRAMMAR_POOL_ONLY_FEATURE = "internal/validation/schema/use-grammar-pool-only";
  
      /** Internal performance related feature:
       * false - the parser settings (features/properties) have not changed between 2 parses
       * true - the parser settings have changed between 2 parses
       * NOTE: this feature should only be set by the parser configuration.
       */
      public static final String PARSER_SETTINGS = "internal/parser-settings";
  
  
      /** Feature to make XML Processor XInclude Aware */
      public static final String XINCLUDE_AWARE = "xinclude-aware";
  
      /** Ignore xsi:schemaLocation and xsi:noNamespaceSchemaLocation. */
      public static final String IGNORE_SCHEMA_LOCATION_HINTS = "validation/schema/ignore-schema-location-hints";
  
      /**
       * When true, the schema processor will change characters events
       * to ignorableWhitespaces events, when characters are expected to
       * only contain ignorable whitespaces.
       */
      public static final String CHANGE_IGNORABLE_CHARACTERS_INTO_IGNORABLE_WHITESPACES =
          "validation/change-ignorable-characters-into-ignorable-whitespaces";
  
      // xerces properties
  
      /** Xerces properties prefix ("http://apache.org/xml/properties/"). */
      public static final String XERCES_PROPERTY_PREFIX = "http://apache.org/xml/properties/";
  
      /** Current element node property ("dom/current-element-node"). */
      public static final String CURRENT_ELEMENT_NODE_PROPERTY = "dom/current-element-node";
  
      /** Document class name property ("dom/document-class-name"). */
      public static final String DOCUMENT_CLASS_NAME_PROPERTY = "dom/document-class-name";
  
      /** Symbol table property ("internal/symbol-table"). */
      public static final String SYMBOL_TABLE_PROPERTY = "internal/symbol-table";
  
      /** Error reporter property ("internal/error-reporter"). */
      public static final String ERROR_REPORTER_PROPERTY = "internal/error-reporter";
  
      /** Error handler property ("internal/error-handler"). */
      public static final String ERROR_HANDLER_PROPERTY = "internal/error-handler";
  
      /** XInclude handler property ("internal/xinclude-handler"). */
      public static final String XINCLUDE_HANDLER_PROPERTY = "internal/xinclude-handler";
  
      /** XPointer handler property ("internal/xpointer-handler"). */
      public static final String XPOINTER_HANDLER_PROPERTY = "internal/xpointer-handler";
  
      /** Entity manager property ("internal/entity-manager"). */
      public static final String ENTITY_MANAGER_PROPERTY = "internal/entity-manager";
      /** Input buffer size property ("input-buffer-size"). */
      public static final String BUFFER_SIZE_PROPERTY = "input-buffer-size";
  
      /** Security manager property ("security-manager"). */
      public static final String SECURITY_MANAGER_PROPERTY = "security-manager";
  
      /** Locale property ("locale"). */
      public static final String LOCALE_PROPERTY = "locale";
  
      /** property identifier: security manager. */
      public static final String SECURITY_MANAGER =
          Constants.XERCES_PROPERTY_PREFIX + Constants.SECURITY_MANAGER_PROPERTY;
  
  
      public static final String ENTITY_RESOLVER_PROPERTY = "internal/entity-resolver";
  
      /** Grammar pool property ("internal/grammar-pool"). */
      public static final String XMLGRAMMAR_POOL_PROPERTY = "internal/grammar-pool";
  
      /** Datatype validator factory ("internal/datatype-validator-factory"). */
      public static final String DATATYPE_VALIDATOR_FACTORY_PROPERTY = "internal/datatype-validator-factory";
  
      /** Document scanner property ("internal/document-scanner"). */
      public static final String DOCUMENT_SCANNER_PROPERTY = "internal/document-scanner";
  
      /** DTD scanner property ("internal/dtd-scanner"). */
      public static final String DTD_SCANNER_PROPERTY = "internal/dtd-scanner";
  
      /** DTD processor property ("internal/dtd-processor"). */
      public static final String DTD_PROCESSOR_PROPERTY = "internal/dtd-processor";
  
      /** Validator property ("internal/validator"). */
      public static final String VALIDATOR_PROPERTY = "internal/validator";
  
      /** Validator property ("internal/validator/dtd"). */
      public static final String DTD_VALIDATOR_PROPERTY = "internal/validator/dtd";
  
      /** Validator property ("internal/validator/schema"). */
      public static final String SCHEMA_VALIDATOR_PROPERTY = "internal/validator/schema";
  
      /** No namespace schema location property ("schema/external-schemaLocation"). */
      public static final String SCHEMA_LOCATION = "schema/external-schemaLocation";
  
      /** Schema location property ("schema/external-noNamespaceSchemaLocation"). */
      public static final String SCHEMA_NONS_LOCATION = "schema/external-noNamespaceSchemaLocation";
  
      /** Namespace binder property ("internal/namespace-binder"). */
      public static final String NAMESPACE_BINDER_PROPERTY = "internal/namespace-binder";
  
      /** Namespace context property ("internal/namespace-context"). */
      public static final String NAMESPACE_CONTEXT_PROPERTY = "internal/namespace-context";
  
      /** Validation manager property ("internal/validation-manager"). */
      public static final String VALIDATION_MANAGER_PROPERTY = "internal/validation-manager";
  
  
      /** XPointer Schema property ("xpointer-schema"). */
      public static final String XPOINTER_SCHEMA_PROPERTY = "xpointer-schema";
  
      /** Schema element declaration for the root element in a document ("internal/validation/schema/dv-factory"). */
      public static final String SCHEMA_DV_FACTORY_PROPERTY = "internal/validation/schema/dv-factory";
  
  
      // general constants
  
      /** Element PSVI is stored in augmentations using string "ELEMENT_PSVI" */
      public final static String ELEMENT_PSVI = "ELEMENT_PSVI";
  
      /** Attribute PSVI is stored in augmentations using string "ATTRIBUTE_PSVI" */
      public final static String ATTRIBUTE_PSVI = "ATTRIBUTE_PSVI";
  
      /**
       * Boolean indicating whether an attribute is declared in the DTD is stored
       * in augmentations using the string "ATTRIBUTE_DECLARED". The absence of this
       * augmentation indicates that the attribute was not declared in the DTD.
       */
      public final static String ATTRIBUTE_DECLARED = "ATTRIBUTE_DECLARED";
  
  
      /**
       * {@link org.w3c.dom.TypeInfo} associated with current element/attribute
       * is stored in augmentations using this string as the key.
       *
       * This will ultimately controls {@link AbstractDOMParser}
       * regarding what object the DOM will return from
       * {@link org.w3c.dom.Attr#getSchemaTypeInfo()} and
       * {@link org.w3c.dom.Element#getSchemaTypeInfo()} and
       */
      public final static String TYPEINFO = "org.w3c.dom.TypeInfo";
  
      /**
       * Whether an attribute is an id or not is stored in augmentations
       * using this string as the key. The value is {@link Boolean#TRUE}
       * or {@link Boolean#FALSE}.
       *
       * This will ultimately controls {@link AbstractDOMParser}
       * about whether it will mark an attribute as ID or not.
       */
      public final static String ID_ATTRIBUTE = "ID_ATTRIBUTE";
  
      // XML version constants
  
      /**
       * Boolean indicating whether an entity referenced in the document has
       * not been read is stored in augmentations using the string "ENTITY_SKIPPED".
       * The absence of this augmentation indicates that the entity had a
       * declaration and was expanded.
       */
      public final static String ENTITY_SKIPPED = "ENTITY_SKIPPED";
  
      /**
       * Boolean indicating whether a character is a probable white space
       * character (ch <= 0x20) that was the replacement text of a character
       * reference is stored in augmentations using the string "CHAR_REF_PROBABLE_WS".
       * The absence of this augmentation indicates that the character is not
       * probable white space and/or was not included from a character reference.
       */
      public final static String CHAR_REF_PROBABLE_WS = "CHAR_REF_PROBABLE_WS";
  
      /** Boolean indicating if this entity is the last opened entity.
       *
       *@see XMLEntityManager#endEntity()
       *@see XMLDocumentScannerImpl#endEntity()
       *@see XMLDTDScannerImpl#endEntity()
       */
      public final static String LAST_ENTITY = "LAST_ENTITY";
  
      // XML version constants
      public final static short XML_VERSION_ERROR = -1;
      public final static short XML_VERSION_1_0 = 1;
      public final static short XML_VERSION_1_1 = 2;
  
  
  
      // DOM related constants
      public final static String ANONYMOUS_TYPE_NAMESPACE =
          "http://apache.org/xml/xmlschema/1.0/anonymousTypes";
  
  
  
      // Constant to enable Schema 1.1 support
      public final static boolean SCHEMA_1_1_SUPPORT = false;
      public final static short SCHEMA_VERSION_1_0          = 1;
      public final static short SCHEMA_VERSION_1_0_EXTENDED = 2;
  
      // private
  
      /** SAX features. */
      private static final String[] fgSAXFeatures = {
              NAMESPACES_FEATURE,
              NAMESPACE_PREFIXES_FEATURE,
              STRING_INTERNING_FEATURE,
              VALIDATION_FEATURE,
              EXTERNAL_GENERAL_ENTITIES_FEATURE,
              EXTERNAL_PARAMETER_ENTITIES_FEATURE,
      };
  
      /** SAX properties. */
      private static final String[] fgSAXProperties = {
              DECLARATION_HANDLER_PROPERTY,
              LEXICAL_HANDLER_PROPERTY,
              DOM_NODE_PROPERTY,
              XML_STRING_PROPERTY,
      };
  
      /** Xerces features. */
      private static final String[] fgXercesFeatures = {
  
          SCHEMA_VALIDATION_FEATURE,
          SCHEMA_FULL_CHECKING,
          DYNAMIC_VALIDATION_FEATURE,
          WARN_ON_DUPLICATE_ATTDEF_FEATURE,
          WARN_ON_UNDECLARED_ELEMDEF_FEATURE,
          ALLOW_JAVA_ENCODINGS_FEATURE,
          CONTINUE_AFTER_FATAL_ERROR_FEATURE,
          LOAD_DTD_GRAMMAR_FEATURE,
          LOAD_EXTERNAL_DTD_FEATURE,
          //DEFER_NODE_EXPANSION_FEATURE,
          CREATE_ENTITY_REF_NODES_FEATURE,
          XINCLUDE_AWARE,
          INCLUDE_IGNORABLE_WHITESPACE,
          //GRAMMAR_ACCESS_FEATURE,
          DEFAULT_ATTRIBUTE_VALUES_FEATURE,
          VALIDATE_CONTENT_MODELS_FEATURE,
          VALIDATE_DATATYPES_FEATURE,
          BALANCE_SYNTAX_TREES,
          NOTIFY_CHAR_REFS_FEATURE,
          NOTIFY_BUILTIN_REFS_FEATURE,
          DISALLOW_DOCTYPE_DECL_FEATURE,
          STANDARD_URI_CONFORMANT_FEATURE,
          GENERATE_SYNTHETIC_ANNOTATIONS_FEATURE,
          VALIDATE_ANNOTATIONS_FEATURE,
          HONOUR_ALL_SCHEMALOCATIONS_FEATURE,
          XINCLUDE_FEATURE,
          XINCLUDE_FIXUP_BASE_URIS_FEATURE,
          XINCLUDE_FIXUP_LANGUAGE_FEATURE,
          NAMESPACE_GROWTH_FEATURE,
          TOLERATE_DUPLICATES_FEATURE,
      };
  
      /** Xerces properties. */
      private static final String[] fgXercesProperties = {
              CURRENT_ELEMENT_NODE_PROPERTY,
              DOCUMENT_CLASS_NAME_PROPERTY,
              SYMBOL_TABLE_PROPERTY,
              ERROR_HANDLER_PROPERTY,
              ERROR_REPORTER_PROPERTY,
              ENTITY_MANAGER_PROPERTY,
              ENTITY_RESOLVER_PROPERTY,
              XMLGRAMMAR_POOL_PROPERTY,
              DATATYPE_VALIDATOR_FACTORY_PROPERTY,
              DOCUMENT_SCANNER_PROPERTY,
              DTD_SCANNER_PROPERTY,
              VALIDATOR_PROPERTY,
              SCHEMA_LOCATION,
              SCHEMA_NONS_LOCATION,
              VALIDATION_MANAGER_PROPERTY,
              BUFFER_SIZE_PROPERTY,
              SECURITY_MANAGER_PROPERTY,
              LOCALE_PROPERTY,
              SCHEMA_DV_FACTORY_PROPERTY,
      };
  
      /** Empty enumeration. */
      private static final Enumeration fgEmptyEnumeration = new ArrayEnumeration(new Object[] {});
  
      //
      // Constructors
      //
  
      /** This class cannot be instantiated. */
      private Constants() {}
  
      //
      // Public methods
      //
  
      // sax
  
      /** Returns an enumeration of the SAX features. */
      public static Enumeration getSAXFeatures() {
          return fgSAXFeatures.length > 0
          ? new ArrayEnumeration(fgSAXFeatures) : fgEmptyEnumeration;
      } // getSAXFeatures():Enumeration
  
      /** Returns an enumeration of the SAX properties. */
      public static Enumeration getSAXProperties() {
          return fgSAXProperties.length > 0
          ? new ArrayEnumeration(fgSAXProperties) : fgEmptyEnumeration;
      } // getSAXProperties():Enumeration
  
      // xerces
  
      /** Returns an enumeration of the Xerces features. */
      public static Enumeration getXercesFeatures() {
          return fgXercesFeatures.length > 0
          ? new ArrayEnumeration(fgXercesFeatures) : fgEmptyEnumeration;
      } // getXercesFeatures():Enumeration
  
      /** Returns an enumeration of the Xerces properties. */
      public static Enumeration getXercesProperties() {
          return fgXercesProperties.length > 0
          ? new ArrayEnumeration(fgXercesProperties) : fgEmptyEnumeration;
      } // getXercesProperties():Enumeration
  
      /*
       * Check the version of the current JDK against that specified in the
       * parameter
       *
       * There is a proposal to change the java version string to:
       * MAJOR.MINOR.FU.CPU.PSU-BUILDNUMBER_BUGIDNUMBER_OPTIONAL
       * This method would work with both the current format and that proposed
       *
       * @param compareTo a JDK version to be compared to
       * @return true if the current version is the same or above that represented
       * by the parameter
       */
      public static boolean isJavaVersionAtLeast(int compareTo) {
          String javaVersion = "1.8";
          String[] versions = javaVersion.split("\\.", 3);
          if (Integer.parseInt(versions[0]) >= compareTo ||
              Integer.parseInt(versions[1]) >= compareTo) {
              return true;
          }
          return false;
      }
  
      //
      // Classes
      //
  
      /**
       * An array enumeration.
       *
       * @author Andy Clark, IBM
       */
      static class ArrayEnumeration
      implements Enumeration {
  
          //
          // Data
          //
  
          /** Array. */
          private Object[] array;
  
          /** Index. */
          private int index;
  
          //
          // Constructors
          //
  
          /** Constructs an array enumeration. */
          public ArrayEnumeration(Object[] array) {
              this.array = array;
          } // <init>(Object[])
  
          //
          // Enumeration methods
          //
  
          /**
           * Tests if this enumeration contains more elements.
           *
           * @return  <code>true</code> if this enumeration contains more elements;
           *          <code>false</code> otherwise.
           * @since   JDK1.0
           */
          public boolean hasMoreElements() {
              return index < array.length;
          } // hasMoreElement():boolean
  
          /**
           * Returns the next element of this enumeration.
           *
           * @return     the next element of this enumeration.
           * @exception  NoSuchElementException  if no more elements exist.
           * @since      JDK1.0
           */
          public Object nextElement() {
              if (index < array.length) {
                  return array[index++];
              }
              throw new NoSuchElementException();
          } // nextElement():Object
  
      } // class ArrayEnumeration
  
      //
      // MAIN
      //
  
      /** Prints all of the constants to standard output. */
      public static void main(String[] argv) {
  
          print("SAX features:", SAX_FEATURE_PREFIX, fgSAXFeatures);
          print("SAX properties:", SAX_PROPERTY_PREFIX, fgSAXProperties);
          print("Xerces features:", XERCES_FEATURE_PREFIX, fgXercesFeatures);
          print("Xerces properties:", XERCES_PROPERTY_PREFIX, fgXercesProperties);
  
      } // main(String[])
  
      /** Prints a list of features/properties. */
      private static void print(String header, String prefix, Object[] array) {
          System.out.print(header);
          if (array.length > 0) {
              System.out.println();
              for (int i = 0; i < array.length; i++) {
                  System.out.print("  ");
                  System.out.print(prefix);
                  System.out.println(array[i]);
              }
          }
          else {
              System.out.println(" none.");
          }
      } // print(String,String,Object[])
  
  } // class Constants
  