java/15 : java.xml/com/sun/xml/internal/stream/XMLEntityStorage.java

XMLEntityStorage
https://openjdk.java.net/
GPLv2 + Classpath Exception
/*
 * Copyright (c) 2005, 2017, 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.xml.internal.stream;

import com.sun.org.apache.xerces.internal.impl.Constants;
import com.sun.org.apache.xerces.internal.impl.PropertyManager;
import com.sun.org.apache.xerces.internal.impl.XMLEntityManager;
import com.sun.org.apache.xerces.internal.impl.XMLErrorReporter;
import com.sun.org.apache.xerces.internal.impl.msg.XMLMessageFormatter;
import com.sun.org.apache.xerces.internal.util.URI;
import com.sun.org.apache.xerces.internal.util.XMLResourceIdentifierImpl;
import com.sun.org.apache.xerces.internal.xni.parser.XMLComponentManager;
import com.sun.org.apache.xerces.internal.xni.parser.XMLConfigurationException;
import java.util.HashMap;
import java.util.Map;
import jdk.xml.internal.SecuritySupport;

Author: K.Venugopal SUN Microsystems, Neeraj Bajaj SUN Microsystems, Andy Clark, IBM/**
 *
 * @author K.Venugopal SUN Microsystems
 * @author Neeraj Bajaj SUN Microsystems
 * @author Andy Clark, IBM
 *
 */
public class XMLEntityStorage {

    Property identifier: error reporter. /** Property identifier: error reporter. */
    protected static final String ERROR_REPORTER =
    Constants.XERCES_PROPERTY_PREFIX + Constants.ERROR_REPORTER_PROPERTY;

    Feature identifier: warn on duplicate EntityDef /** Feature identifier: warn on duplicate EntityDef */
    protected static final String WARN_ON_DUPLICATE_ENTITYDEF =
    Constants.XERCES_FEATURE_PREFIX +Constants.WARN_ON_DUPLICATE_ENTITYDEF_FEATURE;

    warn on duplicate Entity declaration.
 http://apache.org/xml/features/warn-on-duplicate-entitydef
/** warn on duplicate Entity declaration.
     *  http://apache.org/xml/features/warn-on-duplicate-entitydef
     */
    protected boolean fWarnDuplicateEntityDef;

    Entities. /** Entities. */
    protected Map<String, Entity> fEntities = new HashMap<>();

    protected Entity.ScannedEntity fCurrentEntity ;

    private XMLEntityManager fEntityManager;
    Error reporter. This property identifier is:
http://apache.org/xml/properties/internal/error-reporter
/**
     * Error reporter. This property identifier is:
     * http://apache.org/xml/properties/internal/error-reporter
     */
    protected XMLErrorReporter fErrorReporter;
    protected PropertyManager fPropertyManager ;

    /* To keep track whether an entity is declared in external or internal subset*/
    protected boolean fInExternalSubset = false;

    Creates a new instance of XMLEntityStorage /** Creates a new instance of XMLEntityStorage */
    public XMLEntityStorage(PropertyManager propertyManager) {
        fPropertyManager = propertyManager ;
    }

    Creates a new instance of XMLEntityStorage /** Creates a new instance of XMLEntityStorage */
    /*public XMLEntityStorage(Entity.ScannedEntity currentEntity) {
        fCurrentEntity = currentEntity ;*/
    public XMLEntityStorage(XMLEntityManager entityManager) {
        fEntityManager = entityManager;
    }

    public void reset(PropertyManager propertyManager){

        fErrorReporter = (XMLErrorReporter)propertyManager.getProperty(Constants.XERCES_PROPERTY_PREFIX + Constants.ERROR_REPORTER_PROPERTY);
        fEntities.clear();
        fCurrentEntity = null;

    }

    public void reset(){
        fEntities.clear();
        fCurrentEntity = null;
    }
    Resets the component. The component can query the component manager
about any features and properties that affect the operation of the
component.
Params: componentManager – The component manager.
Throws: SAXException – Thrown by component on initialization error.
                     For example, if a feature or property is
                     required for the operation of the component, the
                     component manager may throw a
                     SAXNotRecognizedException or a
                     SAXNotSupportedException./**
     * Resets the component. The component can query the component manager
     * about any features and properties that affect the operation of the
     * component.
     *
     * @param componentManager The component manager.
     *
     * @throws SAXException Thrown by component on initialization error.
     *                      For example, if a feature or property is
     *                      required for the operation of the component, the
     *                      component manager may throw a
     *                      SAXNotRecognizedException or a
     *                      SAXNotSupportedException.
     */
    public void reset(XMLComponentManager componentManager)
    throws XMLConfigurationException {


        // xerces features

        fWarnDuplicateEntityDef = componentManager.getFeature(WARN_ON_DUPLICATE_ENTITYDEF, false);

        fErrorReporter = (XMLErrorReporter)componentManager.getProperty(ERROR_REPORTER);

        fEntities.clear();
        fCurrentEntity = null;

    } // reset(XMLComponentManager)

    Returns entity declaration.
Params: name – The name of the entity.
See Also: SymbolTable/**
     * Returns entity declaration.
     *
     * @param name The name of the entity.
     *
     * @see SymbolTable
     */
    public Entity getEntity(String name) {
        return fEntities.get(name);
    } // getEntity(String)

    public Map<String, Entity> getEntities() {
        return fEntities;
    }
    Adds an internal entity declaration.

Note: This method ignores subsequent entity
declarations.

Note: The name should be a unique symbol. The
SymbolTable can be used for this purpose.
Params: name – The name of the entity.
text – The text of the entity.
See Also: SymbolTable/**
     * Adds an internal entity declaration.
     * <p>
     * <strong>Note:</strong> This method ignores subsequent entity
     * declarations.
     * <p>
     * <strong>Note:</strong> The name should be a unique symbol. The
     * SymbolTable can be used for this purpose.
     *
     * @param name The name of the entity.
     * @param text The text of the entity.
     *
     * @see SymbolTable
     */
    public void addInternalEntity(String name, String text) {
      if (!fEntities.containsKey(name)) {
            Entity entity = new Entity.InternalEntity(name, text, fInExternalSubset);
            fEntities.put(name, entity);
        }
        else{
            if(fWarnDuplicateEntityDef){
                fErrorReporter.reportError(XMLMessageFormatter.XML_DOMAIN,
                "MSG_DUPLICATE_ENTITY_DEFINITION",
                new Object[]{ name },
                XMLErrorReporter.SEVERITY_WARNING );
            }
        }
    } // addInternalEntity(String,String)

    Adds an external entity declaration.

Note: This method ignores subsequent entity
declarations.

Note: The name should be a unique symbol. The
SymbolTable can be used for this purpose.
Params: name –         The name of the entity.
publicId –     The public identifier of the entity.
literalSystemId –     The system identifier of the entity.
baseSystemId – The base system identifier of the entity.
                    This is the system identifier of the entity
                    where the entity being added and
                    is used to expand the system identifier when
                    the system identifier is a relative URI.
                    When null the system identifier of the first
                    external entity on the stack is used instead.
See Also: SymbolTable/**
     * Adds an external entity declaration.
     * <p>
     * <strong>Note:</strong> This method ignores subsequent entity
     * declarations.
     * <p>
     * <strong>Note:</strong> The name should be a unique symbol. The
     * SymbolTable can be used for this purpose.
     *
     * @param name         The name of the entity.
     * @param publicId     The public identifier of the entity.
     * @param literalSystemId     The system identifier of the entity.
     * @param baseSystemId The base system identifier of the entity.
     *                     This is the system identifier of the entity
     *                     where <em>the entity being added</em> and
     *                     is used to expand the system identifier when
     *                     the system identifier is a relative URI.
     *                     When null the system identifier of the first
     *                     external entity on the stack is used instead.
     *
     * @see SymbolTable
     */
    public void addExternalEntity(String name,
    String publicId, String literalSystemId,
    String baseSystemId) {
        if (!fEntities.containsKey(name)) {
            if (baseSystemId == null) {
                // search for the first external entity on the stack
                //xxx commenting the 'size' variable..
                /**
                 * int size = fEntityStack.size();
                 * if (size == 0 && fCurrentEntity != null && fCurrentEntity.entityLocation != null) {
                 * baseSystemId = fCurrentEntity.entityLocation.getExpandedSystemId();
                 * }
                 */

                //xxx we need to have information about the current entity.
                if (fCurrentEntity != null && fCurrentEntity.entityLocation != null) {
                    baseSystemId = fCurrentEntity.entityLocation.getExpandedSystemId();
                }
                /**
                 * for (int i = size - 1; i >= 0 ; i--) {
                 * ScannedEntity externalEntity =
                 * (ScannedEntity)fEntityStack.elementAt(i);
                 * if (externalEntity.entityLocation != null && externalEntity.entityLocation.getExpandedSystemId() != null) {
                 * baseSystemId = externalEntity.entityLocation.getExpandedSystemId();
                 * break;
                 * }
                 * }
                 */
            }

            fCurrentEntity = fEntityManager.getCurrentEntity();
            Entity entity = new Entity.ExternalEntity(name,
            new XMLResourceIdentifierImpl(publicId, literalSystemId,
            baseSystemId, expandSystemId(literalSystemId, baseSystemId)),
            null, fInExternalSubset);
            //TODO :: Forced to pass true above remove it.
            //(fCurrentEntity == null) ? fasle : fCurrentEntity.isEntityDeclInExternalSubset());
            //                                  null, fCurrentEntity.isEntityDeclInExternalSubset());
            fEntities.put(name, entity);
        }
        else{
            if(fWarnDuplicateEntityDef){
                fErrorReporter.reportError(XMLMessageFormatter.XML_DOMAIN,
                "MSG_DUPLICATE_ENTITY_DEFINITION",
                new Object[]{ name },
                XMLErrorReporter.SEVERITY_WARNING );
            }
        }

    } // addExternalEntity(String,String,String,String)

    Checks whether an entity given by name is external.
Params: entityName – The name of the entity to check.
@returns True if the entity is external, false otherwise
          (including when the entity is not declared)./**
     * Checks whether an entity given by name is external.
     *
     * @param entityName The name of the entity to check.
     * @returns True if the entity is external, false otherwise
     *           (including when the entity is not declared).
     */
    public boolean isExternalEntity(String entityName) {

        Entity entity = fEntities.get(entityName);
        if (entity == null) {
            return false;
        }
        return entity.isExternal();
    }

    Checks whether the declaration of an entity given by name is
// in the external subset.
Params: entityName – The name of the entity to check.
@returns True if the entity was declared in the external subset, false otherwise
          (including when the entity is not declared)./**
     * Checks whether the declaration of an entity given by name is
     * // in the external subset.
     *
     * @param entityName The name of the entity to check.
     * @returns True if the entity was declared in the external subset, false otherwise
     *           (including when the entity is not declared).
     */
    public boolean isEntityDeclInExternalSubset(String entityName) {

        Entity entity = fEntities.get(entityName);
        if (entity == null) {
            return false;
        }
        return entity.isEntityDeclInExternalSubset();
    }

    Adds an unparsed entity declaration.

Note: This method ignores subsequent entity
declarations.

Note: The name should be a unique symbol. The
SymbolTable can be used for this purpose.
Params: name –     The name of the entity.
publicId – The public identifier of the entity.
systemId – The system identifier of the entity.
notation – The name of the notation.
See Also: SymbolTable/**
     * Adds an unparsed entity declaration.
     * <p>
     * <strong>Note:</strong> This method ignores subsequent entity
     * declarations.
     * <p>
     * <strong>Note:</strong> The name should be a unique symbol. The
     * SymbolTable can be used for this purpose.
     *
     * @param name     The name of the entity.
     * @param publicId The public identifier of the entity.
     * @param systemId The system identifier of the entity.
     * @param notation The name of the notation.
     *
     * @see SymbolTable
     */
    public void addUnparsedEntity(String name,
    String publicId, String systemId,
    String baseSystemId, String notation) {

        fCurrentEntity = fEntityManager.getCurrentEntity();
        if (!fEntities.containsKey(name)) {
            Entity entity = new Entity.ExternalEntity(name,
                    new XMLResourceIdentifierImpl(publicId, systemId, baseSystemId, null),
                    notation, fInExternalSubset);
            fEntities.put(name, entity);
        }
        else{
            if(fWarnDuplicateEntityDef){
                fErrorReporter.reportError(XMLMessageFormatter.XML_DOMAIN,
                "MSG_DUPLICATE_ENTITY_DEFINITION",
                new Object[]{ name },
                XMLErrorReporter.SEVERITY_WARNING );
            }
        }
    } // addUnparsedEntity(String,String,String,String)

    Checks whether an entity given by name is unparsed.
Params: entityName – The name of the entity to check.
@returns True if the entity is unparsed, false otherwise
         (including when the entity is not declared)./**
     * Checks whether an entity given by name is unparsed.
     *
     * @param entityName The name of the entity to check.
     * @returns True if the entity is unparsed, false otherwise
     *          (including when the entity is not declared).
     */
    public boolean isUnparsedEntity(String entityName) {

        Entity entity = fEntities.get(entityName);
        if (entity == null) {
            return false;
        }
        return entity.isUnparsed();
    }

    Checks whether an entity given by name is declared.
Params: entityName – The name of the entity to check.
@returns True if the entity is declared, false otherwise./**
     * Checks whether an entity given by name is declared.
     *
     * @param entityName The name of the entity to check.
     * @returns True if the entity is declared, false otherwise.
     */
    public boolean isDeclaredEntity(String entityName) {

        Entity entity = fEntities.get(entityName);
        return entity != null;
    }
    Expands a system id and returns the system id as a URI, if
it can be expanded. A return value of null means that the
identifier is already expanded. An exception thrown
indicates a failure to expand the id.
Params: systemId – The systemId to be expanded.
Returns: Returns the URI string representing the expanded system
        identifier. A null value indicates that the given
        system identifier is already expanded./**
     * Expands a system id and returns the system id as a URI, if
     * it can be expanded. A return value of null means that the
     * identifier is already expanded. An exception thrown
     * indicates a failure to expand the id.
     *
     * @param systemId The systemId to be expanded.
     *
     * @return Returns the URI string representing the expanded system
     *         identifier. A null value indicates that the given
     *         system identifier is already expanded.
     *
     */
    public static String expandSystemId(String systemId) {
        return expandSystemId(systemId, null);
    } // expandSystemId(String):String

    // current value of the "user.dir" property
    private static String gUserDir;
    // escaped value of the current "user.dir" property
    private static String gEscapedUserDir;
    // which ASCII characters need to be escaped
    private static boolean gNeedEscaping[] = new boolean[128];
    // the first hex character if a character needs to be escaped
    private static char gAfterEscaping1[] = new char[128];
    // the second hex character if a character needs to be escaped
    private static char gAfterEscaping2[] = new char[128];
    private static char[] gHexChs = {'0', '1', '2', '3', '4', '5', '6', '7',
    '8', '9', 'A', 'B', 'C', 'D', 'E', 'F'};
    // initialize the above 3 arrays
    static {
        for (int i = 0; i <= 0x1f; i++) {
            gNeedEscaping[i] = true;
            gAfterEscaping1[i] = gHexChs[i >> 4];
            gAfterEscaping2[i] = gHexChs[i & 0xf];
        }
        gNeedEscaping[0x7f] = true;
        gAfterEscaping1[0x7f] = '7';
        gAfterEscaping2[0x7f] = 'F';
        char[] escChs = {' ', '<', '>', '#', '%', '"', '{', '}',
        '|', '\\', '^', '~', '[', ']', '`'};
        int len = escChs.length;
        char ch;
        for (int i = 0; i < len; i++) {
            ch = escChs[i];
            gNeedEscaping[ch] = true;
            gAfterEscaping1[ch] = gHexChs[ch >> 4];
            gAfterEscaping2[ch] = gHexChs[ch & 0xf];
        }
    }
    // To escape the "user.dir" system property, by using %HH to represent
    // special ASCII characters: 0x00~0x1F, 0x7F, ' ', '<', '>', '#', '%'
    // and '"'. It's a static method, so needs to be synchronized.
    // this method looks heavy, but since the system property isn't expected
    // to change often, so in most cases, we only need to return the string
    // that was escaped before.
    // According to the URI spec, non-ASCII characters (whose value >= 128)
    // need to be escaped too.
    // REVISIT: don't know how to escape non-ASCII characters, especially
    // which encoding to use. Leave them for now.
    private static synchronized String getUserDir() {
        // get the user.dir property
        String userDir = "";
        try {
            userDir = SecuritySupport.getSystemProperty("user.dir");
        }
        catch (SecurityException se) {
        }

        // return empty string if property value is empty string.
        if (userDir.length() == 0)
            return "";

        // compute the new escaped value if the new property value doesn't
        // match the previous one
        if (userDir.equals(gUserDir)) {
            return gEscapedUserDir;
        }

        // record the new value as the global property value
        gUserDir = userDir;

        char separator = java.io.File.separatorChar;
        userDir = userDir.replace(separator, '/');

        int len = userDir.length(), ch;
        StringBuilder buffer = new StringBuilder(len*3);
        // change C:/blah to /C:/blah
        if (len >= 2 && userDir.charAt(1) == ':') {
            ch = Character.toUpperCase(userDir.charAt(0));
            if (ch >= 'A' && ch <= 'Z') {
                buffer.append('/');
            }
        }

        // for each character in the path
        int i = 0;
        for (; i < len; i++) {
            ch = userDir.charAt(i);
            // if it's not an ASCII character, break here, and use UTF-8 encoding
            if (ch >= 128)
                break;
            if (gNeedEscaping[ch]) {
                buffer.append('%');
                buffer.append(gAfterEscaping1[ch]);
                buffer.append(gAfterEscaping2[ch]);
                // record the fact that it's escaped
            }
            else {
                buffer.append((char)ch);
            }
        }

        // we saw some non-ascii character
        if (i < len) {
            // get UTF-8 bytes for the remaining sub-string
            byte[] bytes = null;
            byte b;
            try {
                bytes = userDir.substring(i).getBytes("UTF-8");
            } catch (java.io.UnsupportedEncodingException e) {
                // should never happen
                return userDir;
            }
            len = bytes.length;

            // for each byte
            for (i = 0; i < len; i++) {
                b = bytes[i];
                // for non-ascii character: make it positive, then escape
                if (b < 0) {
                    ch = b + 256;
                    buffer.append('%');
                    buffer.append(gHexChs[ch >> 4]);
                    buffer.append(gHexChs[ch & 0xf]);
                }
                else if (gNeedEscaping[b]) {
                    buffer.append('%');
                    buffer.append(gAfterEscaping1[b]);
                    buffer.append(gAfterEscaping2[b]);
                }
                else {
                    buffer.append((char)b);
                }
            }
        }

        // change blah/blah to blah/blah/
        if (!userDir.endsWith("/"))
            buffer.append('/');

        gEscapedUserDir = buffer.toString();

        return gEscapedUserDir;
    }

    Expands a system id and returns the system id as a URI, if
it can be expanded. A return value of null means that the
identifier is already expanded. An exception thrown
indicates a failure to expand the id.
Params: systemId – The systemId to be expanded.
Returns: Returns the URI string representing the expanded system
        identifier. A null value indicates that the given
        system identifier is already expanded./**
     * Expands a system id and returns the system id as a URI, if
     * it can be expanded. A return value of null means that the
     * identifier is already expanded. An exception thrown
     * indicates a failure to expand the id.
     *
     * @param systemId The systemId to be expanded.
     *
     * @return Returns the URI string representing the expanded system
     *         identifier. A null value indicates that the given
     *         system identifier is already expanded.
     *
     */
    public static String expandSystemId(String systemId, String baseSystemId) {

        // check for bad parameters id
        if (systemId == null || systemId.length() == 0) {
            return systemId;
        }
        // if id already expanded, return
        try {
            new URI(systemId);
            return systemId;
        } catch (URI.MalformedURIException e) {
            // continue on...
        }
        // normalize id
        String id = fixURI(systemId);

        // normalize base
        URI base = null;
        URI uri = null;
        try {
            if (baseSystemId == null || baseSystemId.length() == 0 ||
            baseSystemId.equals(systemId)) {
                String dir = getUserDir();
                base = new URI("file", "", dir, null, null);
            }
            else {
                try {
                    base = new URI(fixURI(baseSystemId));
                }
                catch (URI.MalformedURIException e) {
                    if (baseSystemId.indexOf(':') != -1) {
                        // for xml schemas we might have baseURI with
                        // a specified drive
                        base = new URI("file", "", fixURI(baseSystemId), null, null);
                    }
                    else {
                        String dir = getUserDir();
                        dir = dir + fixURI(baseSystemId);
                        base = new URI("file", "", dir, null, null);
                    }
                }
            }
            // expand id
            uri = new URI(base, id);
        }
        catch (Exception e) {
            // let it go through

        }

        if (uri == null) {
            return systemId;
        }
        return uri.toString();

    } // expandSystemId(String,String):String
    //
    // Protected static methods
    //

    Fixes a platform dependent filename to standard URI form.
Params: str – The string to fix.
Returns: Returns the fixed URI string./**
     * Fixes a platform dependent filename to standard URI form.
     *
     * @param str The string to fix.
     *
     * @return Returns the fixed URI string.
     */
    protected static String fixURI(String str) {

        // handle platform dependent strings
        str = str.replace(java.io.File.separatorChar, '/');

        // Windows fix
        if (str.length() >= 2) {
            char ch1 = str.charAt(1);
            // change "C:blah" to "/C:blah"
            if (ch1 == ':') {
                char ch0 = Character.toUpperCase(str.charAt(0));
                if (ch0 >= 'A' && ch0 <= 'Z') {
                    str = "/" + str;
                }
            }
            // change "//blah" to "file://blah"
            else if (ch1 == '/' && str.charAt(0) == '/') {
                str = "file:" + str;
            }
        }

        // done
        return str;

    } // fixURI(String):String

    // indicate start of external subset
    public void startExternalSubset() {
        fInExternalSubset = true;
    }

    public void endExternalSubset() {
        fInExternalSubset = false;
    }
}
Params:	componentManager – The component manager.
Throws:	SAXException – Thrown by component on initialization error. For example, if a feature or property is required for the operation of the component, the component manager may throw a SAXNotRecognizedException or a SAXNotSupportedException.
Params:	name – The name of the entity. text – The text of the entity.
See Also:	SymbolTable
Params:	entityName – The name of the entity to check.
@returns	True if the entity is external, false otherwise (including when the entity is not declared).
Params:	name – The name of the entity. publicId – The public identifier of the entity. systemId – The system identifier of the entity. notation – The name of the notation.
See Also:	SymbolTable
Params:	systemId – The systemId to be expanded.
Returns:	Returns the URI string representing the expanded system identifier. A null value indicates that the given system identifier is already expanded.
Params:	str – The string to fix.
Returns:	Returns the fixed URI string.
/

java/ 15/ java.xml/com/sun/xml/internal/stream/XMLEntityStorage.java
