iText kernel.jar Source Code

kernel.jar is a component in iText Java library to provide low-level functionalities. iText Java library allows you to generate and manage PDF documents.

The Source Code files are provided together with the JAR file in the binary packge like iText7-Core-7.1.4.zip. You can download it at iText 7 Core Download site.

You can compile it to generate your JAR file, using kernel.pom as the build configuration file.

The source code of kernel-7.1.4.jar is provided below:

✍: FYIcenter.com

com/itextpdf/kernel/xmp/XMPSchemaRegistry.java

//Copyright (c) 2006, Adobe Systems Incorporated
//All rights reserved.
//
//        Redistribution and use in source and binary forms, with or without
//        modification, are permitted provided that the following conditions are met:
//        1. Redistributions of source code must retain the above copyright
//        notice, this list of conditions and the following disclaimer.
//        2. Redistributions in binary form must reproduce the above copyright
//        notice, this list of conditions and the following disclaimer in the
//        documentation and/or other materials provided with the distribution.
//        3. All advertising materials mentioning features or use of this software
//        must display the following acknowledgement:
//        This product includes software developed by the Adobe Systems Incorporated.
//        4. Neither the name of the Adobe Systems Incorporated nor the
//        names of its contributors may be used to endorse or promote products
//        derived from this software without specific prior written permission.
//
//        THIS SOFTWARE IS PROVIDED BY ADOBE SYSTEMS INCORPORATED ''AS IS'' AND ANY
//        EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
//        WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
//        DISCLAIMED. IN NO EVENT SHALL ADOBE SYSTEMS INCORPORATED BE LIABLE FOR ANY
//        DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
//        (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
//        LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
//        ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
//        (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
//        SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
//        http://www.adobe.com/devnet/xmp/library/eula-xmp-library-java.html

package com.itextpdf.kernel.xmp;

import com.itextpdf.kernel.xmp.properties.XMPAliasInfo;

import java.util.Map;

/**
 * The schema registry keeps track of all namespaces and aliases used in the XMP
 * metadata. At initialisation time, the default namespaces and default aliases
 * are automatically registered. <b>Namespaces</b> must be registered before
 * used in namespace URI parameters or path expressions. Within the XMP Toolkit
 * the registered namespace URIs and prefixes must be unique. Additional
 * namespaces encountered when parsing RDF are automatically registered. The
 * namespace URI should always end in an XML name separator such as '/' or '#'.
 * This is because some forms of RDF shorthand catenate a namespace URI with an
 * element name to form a new URI.
 * <p>
 * <b>Aliases</b> in XMP serve the same purpose as Windows file shortcuts,
 * Macintosh file aliases, or UNIX file symbolic links. The aliases are simply
 * multiple names for the same property. One distinction of XMP aliases is that
 * they are ordered, there is an alias name pointing to an actual name. The
 * primary significance of the actual name is that it is the preferred name for
 * output, generally the most widely recognized name.
 * <p>
 * The names that can be aliased in XMP are restricted. The alias must be a top
 * level property name, not a field within a structure or an element within an
 * array. The actual may be a top level property name, the first element within
 * a top level array, or the default element in an alt-text array. This does not
 * mean the alias can only be a simple property. It is OK to alias a top level
 * structure or array to an identical top level structure or array, or to the
 * first item of an array of structures.
 * 
 * @since 27.01.2006
 */
public interface XMPSchemaRegistry
{
	// ---------------------------------------------------------------------------------------------
	// Namespace Functions

	/**
	 * Register a namespace URI with a suggested prefix. It is not an error if
	 * the URI is already registered, no matter what the prefix is. If the URI
	 * is not registered but the suggested prefix is in use, a unique prefix is
	 * created from the suggested one. The actual registeed prefix is always
	 * returned. The function result tells if the registered prefix is the
	 * suggested one.
	 * <p>
	 * Note: No checking is presently done on either the URI or the prefix.
	 * 
	 * @param namespaceURI
	 *            The URI for the namespace. Must be a valid XML URI.
	 * @param suggestedPrefix
	 *            The suggested prefix to be used if the URI is not yet
	 *            registered. Must be a valid XML name.
	 * @return Returns the registered prefix for this URI, is equal to the
	 *         suggestedPrefix if the namespace hasn't been registered before,
	 *         otherwise the existing prefix.
	 * @throws XMPException If the parameters are not accordingly set
	 */
	String registerNamespace(String namespaceURI, String suggestedPrefix) throws XMPException;

	
	/**
	 * Obtain the prefix for a registered namespace URI.
	 * <p>
	 * It is not an error if the namespace URI is not registered.
	 * 
	 * @param namespaceURI
	 *            The URI for the namespace. Must not be null or the empty
	 *            string.
	 * @return Returns the prefix registered for this namespace URI or null.
	 */
	String getNamespacePrefix(String namespaceURI);

	
	/**
	 * Obtain the URI for a registered namespace prefix.
	 * <p>
	 * It is not an error if the namespace prefix is not registered.
	 * 
	 * @param namespacePrefix
	 *            The prefix for the namespace. Must not be null or the empty
	 *            string.
	 * @return Returns the URI registered for this prefix or null.
	 */
	String getNamespaceURI(String namespacePrefix);

	
	/**
	 * @return Returns the registered prefix/namespace-pairs as map, where the keys are the
	 *         namespaces and the values are the prefixes.
	 */
	Map getNamespaces();

	
	/**
	 * @return Returns the registered namespace/prefix-pairs as map, where the keys are the
	 *         prefixes and the values are the namespaces.
	 */
	Map getPrefixes();
	
	
	/**
	 * Deletes a namespace from the registry.
	 * <p>
	 * Does nothing if the URI is not registered, or if the namespaceURI
	 * parameter is null or the empty string.
	 * <p>
	 * Note: Not yet implemented.
	 * 
	 * @param namespaceURI
	 *            The URI for the namespace.
	 */
	void deleteNamespace(String namespaceURI);

	
	
	
	
	// ---------------------------------------------------------------------------------------------
	// Alias Functions

		
	/**
	 * Determines if a name is an alias, and what it is aliased to.
	 * 
	 * @param aliasNS
	 *            The namespace URI of the alias. Must not be <code>null</code> or the empty
	 *            string.
	 * @param aliasProp
	 *            The name of the alias. May be an arbitrary path expression
	 *            path, must not be <code>null</code> or the empty string.
	 * @return Returns the <code>XMPAliasInfo</code> for the given alias namespace and property or
	 * 		<code>null</code> if there is no such alias.
	 */
	XMPAliasInfo resolveAlias(String aliasNS, String aliasProp);

	
	/**
	 * Collects all aliases that are contained in the provided namespace.
	 * If nothing is found, an empty array is returned. 
	 * 
	 * @param aliasNS a schema namespace URI
	 * @return Returns all alias infos from aliases that are contained in the provided namespace. 
	 */
	XMPAliasInfo[] findAliases(String aliasNS);
	
	
	/**
	 * Searches for registered aliases.
	 * 
	 * @param qname
	 *            an XML conform qname
	 * @return Returns if an alias definition for the given qname to another
	 *         schema and property is registered.
	 */
	XMPAliasInfo findAlias(String qname);
	
		
	/**
	 * @return Returns the registered aliases as map, where the key is the "qname" (prefix and name)
	 * and the value an <code>XMPAliasInfo</code>-object.
	 */
	Map getAliases();


}

com/itextpdf/kernel/xmp/XMPSchemaRegistry.java

 

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