| // Attributes.java - attribute list with Namespace support |
| // http://www.saxproject.org |
| // Written by David Megginson |
| // NO WARRANTY! This class is in the public domain. |
| // $Id: Attributes.java,v 1.10 2004/12/11 15:41:09 dog Exp $ |
| |
| package org.xml.sax; |
| |
| |
| /** |
| * Interface for a list of XML attributes. |
| * |
| * <blockquote> |
| * <em>This module, both source code and documentation, is in the |
| * Public Domain, and comes with <strong>NO WARRANTY</strong>.</em> |
| * See <a href='http://www.saxproject.org'>http://www.saxproject.org</a> |
| * for further information. |
| * </blockquote> |
| * |
| * <p>This interface allows access to a list of attributes in |
| * three different ways:</p> |
| * |
| * <ol> |
| * <li>by attribute index;</li> |
| * <li>by Namespace-qualified name; or</li> |
| * <li>by qualified (prefixed) name.</li> |
| * </ol> |
| * |
| * <p>The list will not contain attributes that were declared |
| * #IMPLIED but not specified in the start tag. It will also not |
| * contain attributes used as Namespace declarations (xmlns*) unless |
| * the <code>http://xml.org/sax/features/namespace-prefixes</code> |
| * feature is set to <var>true</var> (it is <var>false</var> by |
| * default). |
| * Because SAX2 conforms to the original "Namespaces in XML" |
| * recommendation, it normally does not |
| * give namespace declaration attributes a namespace URI. |
| * </p> |
| * |
| * <p>Some SAX2 parsers may support using an optional feature flag |
| * (<code>http://xml.org/sax/features/xmlns-uris</code>) to request |
| * that those attributes be given URIs, conforming to a later |
| * backwards-incompatible revision of that recommendation. (The |
| * attribute's "local name" will be the prefix, or "xmlns" when |
| * defining a default element namespace.) For portability, handler |
| * code should always resolve that conflict, rather than requiring |
| * parsers that can change the setting of that feature flag. </p> |
| * |
| * <p>If the namespace-prefixes feature (see above) is |
| * <var>false</var>, access by qualified name may not be available; if |
| * the <code>http://xml.org/sax/features/namespaces</code> feature is |
| * <var>false</var>, access by Namespace-qualified names may not be |
| * available.</p> |
| * |
| * <p>This interface replaces the now-deprecated SAX1 {@link |
| * org.xml.sax.AttributeList AttributeList} interface, which does not |
| * contain Namespace support. In addition to Namespace support, it |
| * adds the <var>getIndex</var> methods (below).</p> |
| * |
| * <p>The order of attributes in the list is unspecified, and will |
| * vary from implementation to implementation.</p> |
| * |
| * @since SAX 2.0 |
| * @author David Megginson |
| * @version 2.0.1 (sax2r2) |
| * @see org.xml.sax.helpers.AttributesImpl |
| * @see org.xml.sax.ext.DeclHandler#attributeDecl |
| */ |
| public interface Attributes |
| { |
| |
| |
| //////////////////////////////////////////////////////////////////// |
| // Indexed access. |
| //////////////////////////////////////////////////////////////////// |
| |
| |
| /** |
| * Return the number of attributes in the list. |
| * |
| * <p>Once you know the number of attributes, you can iterate |
| * through the list.</p> |
| * |
| * @return The number of attributes in the list. |
| * @see #getURI(int) |
| * @see #getLocalName(int) |
| * @see #getQName(int) |
| * @see #getType(int) |
| * @see #getValue(int) |
| */ |
| public abstract int getLength (); |
| |
| |
| /** |
| * Look up an attribute's Namespace URI by index. |
| * |
| * @param index The attribute index (zero-based). |
| * @return The Namespace URI, or the empty string if none |
| * is available, or null if the index is out of |
| * range. |
| * @see #getLength |
| */ |
| public abstract String getURI (int index); |
| |
| |
| /** |
| * Look up an attribute's local name by index. |
| * |
| * @param index The attribute index (zero-based). |
| * @return The local name, or the empty string if Namespace |
| * processing is not being performed, or null |
| * if the index is out of range. |
| * @see #getLength |
| */ |
| public abstract String getLocalName (int index); |
| |
| |
| /** |
| * Look up an attribute's XML qualified (prefixed) name by index. |
| * |
| * @param index The attribute index (zero-based). |
| * @return The XML qualified name, or the empty string |
| * if none is available, or null if the index |
| * is out of range. |
| * @see #getLength |
| */ |
| public abstract String getQName (int index); |
| |
| |
| /** |
| * Look up an attribute's type by index. |
| * |
| * <p>The attribute type is one of the strings "CDATA", "ID", |
| * "IDREF", "IDREFS", "NMTOKEN", "NMTOKENS", "ENTITY", "ENTITIES", |
| * or "NOTATION" (always in upper case).</p> |
| * |
| * <p>If the parser has not read a declaration for the attribute, |
| * or if the parser does not report attribute types, then it must |
| * return the value "CDATA" as stated in the XML 1.0 Recommendation |
| * (clause 3.3.3, "Attribute-Value Normalization").</p> |
| * |
| * <p>For an enumerated attribute that is not a notation, the |
| * parser will report the type as "NMTOKEN".</p> |
| * |
| * @param index The attribute index (zero-based). |
| * @return The attribute's type as a string, or null if the |
| * index is out of range. |
| * @see #getLength |
| */ |
| public abstract String getType (int index); |
| |
| |
| /** |
| * Look up an attribute's value by index. |
| * |
| * <p>If the attribute value is a list of tokens (IDREFS, |
| * ENTITIES, or NMTOKENS), the tokens will be concatenated |
| * into a single string with each token separated by a |
| * single space.</p> |
| * |
| * @param index The attribute index (zero-based). |
| * @return The attribute's value as a string, or null if the |
| * index is out of range. |
| * @see #getLength |
| */ |
| public abstract String getValue (int index); |
| |
| |
| |
| //////////////////////////////////////////////////////////////////// |
| // Name-based query. |
| //////////////////////////////////////////////////////////////////// |
| |
| |
| /** |
| * Look up the index of an attribute by Namespace name. |
| * |
| * @param uri The Namespace URI, or the empty string if |
| * the name has no Namespace URI. |
| * @param localName The attribute's local name. |
| * @return The index of the attribute, or -1 if it does not |
| * appear in the list. |
| */ |
| public int getIndex (String uri, String localName); |
| |
| |
| /** |
| * Look up the index of an attribute by XML qualified (prefixed) name. |
| * |
| * @param qName The qualified (prefixed) name. |
| * @return The index of the attribute, or -1 if it does not |
| * appear in the list. |
| */ |
| public int getIndex (String qName); |
| |
| |
| /** |
| * Look up an attribute's type by Namespace name. |
| * |
| * <p>See {@link #getType(int) getType(int)} for a description |
| * of the possible types.</p> |
| * |
| * @param uri The Namespace URI, or the empty String if the |
| * name has no Namespace URI. |
| * @param localName The local name of the attribute. |
| * @return The attribute type as a string, or null if the |
| * attribute is not in the list or if Namespace |
| * processing is not being performed. |
| */ |
| public abstract String getType (String uri, String localName); |
| |
| |
| /** |
| * Look up an attribute's type by XML qualified (prefixed) name. |
| * |
| * <p>See {@link #getType(int) getType(int)} for a description |
| * of the possible types.</p> |
| * |
| * @param qName The XML qualified name. |
| * @return The attribute type as a string, or null if the |
| * attribute is not in the list or if qualified names |
| * are not available. |
| */ |
| public abstract String getType (String qName); |
| |
| |
| /** |
| * Look up an attribute's value by Namespace name. |
| * |
| * <p>See {@link #getValue(int) getValue(int)} for a description |
| * of the possible values.</p> |
| * |
| * @param uri The Namespace URI, or the empty String if the |
| * name has no Namespace URI. |
| * @param localName The local name of the attribute. |
| * @return The attribute value as a string, or null if the |
| * attribute is not in the list. |
| */ |
| public abstract String getValue (String uri, String localName); |
| |
| |
| /** |
| * Look up an attribute's value by XML qualified (prefixed) name. |
| * |
| * <p>See {@link #getValue(int) getValue(int)} for a description |
| * of the possible values.</p> |
| * |
| * @param qName The XML qualified name. |
| * @return The attribute value as a string, or null if the |
| * attribute is not in the list or if qualified names |
| * are not available. |
| */ |
| public abstract String getValue (String qName); |
| |
| } |
| |
| // end of Attributes.java |