--- /dev/null
+// SAX input source.
+// http://www.saxproject.org
+// No warranty; no copyright -- use this as you will.
+// $Id: InputSource.java,v 1.9 2002/01/30 21:13:45 dbrownell Exp $
+
+package org.xml.sax;
+
+import java.io.Reader;
+import java.io.InputStream;
+
+/**
+ * A single input source for an XML entity.
+ *
+ * <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 class allows a SAX application to encapsulate information
+ * about an input source in a single object, which may include
+ * a public identifier, a system identifier, a byte stream (possibly
+ * with a specified encoding), and/or a character stream.</p>
+ *
+ * <p>There are two places that the application can deliver an
+ * input source to the parser: as the argument to the Parser.parse
+ * method, or as the return value of the EntityResolver.resolveEntity
+ * method.</p>
+ *
+ * <p>The SAX parser will use the InputSource object to determine how
+ * to read XML input. If there is a character stream available, the
+ * parser will read that stream directly, disregarding any text
+ * encoding declaration found in that stream.
+ * If there is no character stream, but there is
+ * a byte stream, the parser will use that byte stream, using the
+ * encoding specified in the InputSource or else (if no encoding is
+ * specified) autodetecting the character encoding using an algorithm
+ * such as the one in the XML specification. If neither a character
+ * stream nor a
+ * byte stream is available, the parser will attempt to open a URI
+ * connection to the resource identified by the system
+ * identifier.</p>
+ *
+ * <p>An InputSource object belongs to the application: the SAX parser
+ * shall never modify it in any way (it may modify a copy if
+ * necessary). However, standard processing of both byte and
+ * character streams is to close them on as part of end-of-parse cleanup,
+ * so applications should not attempt to re-use such streams after they
+ * have been handed to a parser. </p>
+ *
+ * @since SAX 1.0
+ * @author David Megginson
+ * @version 2.0.1 (sax2r2)
+ * @see org.xml.sax.XMLReader#parse(org.xml.sax.InputSource)
+ * @see org.xml.sax.EntityResolver#resolveEntity
+ * @see java.io.InputStream
+ * @see java.io.Reader
+ */
+public class InputSource {
+
+ /**
+ * Zero-argument default constructor.
+ *
+ * @see #setPublicId
+ * @see #setSystemId
+ * @see #setByteStream
+ * @see #setCharacterStream
+ * @see #setEncoding
+ */
+ public InputSource ()
+ {
+ }
+
+
+ /**
+ * Create a new input source with a system identifier.
+ *
+ * <p>Applications may use setPublicId to include a
+ * public identifier as well, or setEncoding to specify
+ * the character encoding, if known.</p>
+ *
+ * <p>If the system identifier is a URL, it must be fully
+ * resolved (it may not be a relative URL).</p>
+ *
+ * @param systemId The system identifier (URI).
+ * @see #setPublicId
+ * @see #setSystemId
+ * @see #setByteStream
+ * @see #setEncoding
+ * @see #setCharacterStream
+ */
+ public InputSource (String systemId)
+ {
+ setSystemId(systemId);
+ }
+
+
+ /**
+ * Create a new input source with a byte stream.
+ *
+ * <p>Application writers should use setSystemId() to provide a base
+ * for resolving relative URIs, may use setPublicId to include a
+ * public identifier, and may use setEncoding to specify the object's
+ * character encoding.</p>
+ *
+ * @param byteStream The raw byte stream containing the document.
+ * @see #setPublicId
+ * @see #setSystemId
+ * @see #setEncoding
+ * @see #setByteStream
+ * @see #setCharacterStream
+ */
+ public InputSource (InputStream byteStream)
+ {
+ setByteStream(byteStream);
+ }
+
+
+ /**
+ * Create a new input source with a character stream.
+ *
+ * <p>Application writers should use setSystemId() to provide a base
+ * for resolving relative URIs, and may use setPublicId to include a
+ * public identifier.</p>
+ *
+ * <p>The character stream shall not include a byte order mark.</p>
+ *
+ * @see #setPublicId
+ * @see #setSystemId
+ * @see #setByteStream
+ * @see #setCharacterStream
+ */
+ public InputSource (Reader characterStream)
+ {
+ setCharacterStream(characterStream);
+ }
+
+
+ /**
+ * Set the public identifier for this input source.
+ *
+ * <p>The public identifier is always optional: if the application
+ * writer includes one, it will be provided as part of the
+ * location information.</p>
+ *
+ * @param publicId The public identifier as a string.
+ * @see #getPublicId
+ * @see org.xml.sax.Locator#getPublicId
+ * @see org.xml.sax.SAXParseException#getPublicId
+ */
+ public void setPublicId (String publicId)
+ {
+ this.publicId = publicId;
+ }
+
+
+ /**
+ * Get the public identifier for this input source.
+ *
+ * @return The public identifier, or null if none was supplied.
+ * @see #setPublicId
+ */
+ public String getPublicId ()
+ {
+ return publicId;
+ }
+
+
+ /**
+ * Set the system identifier for this input source.
+ *
+ * <p>The system identifier is optional if there is a byte stream
+ * or a character stream, but it is still useful to provide one,
+ * since the application can use it to resolve relative URIs
+ * and can include it in error messages and warnings (the parser
+ * will attempt to open a connection to the URI only if
+ * there is no byte stream or character stream specified).</p>
+ *
+ * <p>If the application knows the character encoding of the
+ * object pointed to by the system identifier, it can register
+ * the encoding using the setEncoding method.</p>
+ *
+ * <p>If the system identifier is a URL, it must be fully
+ * resolved (it may not be a relative URL).</p>
+ *
+ * @param systemId The system identifier as a string.
+ * @see #setEncoding
+ * @see #getSystemId
+ * @see org.xml.sax.Locator#getSystemId
+ * @see org.xml.sax.SAXParseException#getSystemId
+ */
+ public void setSystemId (String systemId)
+ {
+ this.systemId = systemId;
+ }
+
+
+ /**
+ * Get the system identifier for this input source.
+ *
+ * <p>The getEncoding method will return the character encoding
+ * of the object pointed to, or null if unknown.</p>
+ *
+ * <p>If the system ID is a URL, it will be fully resolved.</p>
+ *
+ * @return The system identifier, or null if none was supplied.
+ * @see #setSystemId
+ * @see #getEncoding
+ */
+ public String getSystemId ()
+ {
+ return systemId;
+ }
+
+
+ /**
+ * Set the byte stream for this input source.
+ *
+ * <p>The SAX parser will ignore this if there is also a character
+ * stream specified, but it will use a byte stream in preference
+ * to opening a URI connection itself.</p>
+ *
+ * <p>If the application knows the character encoding of the
+ * byte stream, it should set it with the setEncoding method.</p>
+ *
+ * @param byteStream A byte stream containing an XML document or
+ * other entity.
+ * @see #setEncoding
+ * @see #getByteStream
+ * @see #getEncoding
+ * @see java.io.InputStream
+ */
+ public void setByteStream (InputStream byteStream)
+ {
+ this.byteStream = byteStream;
+ }
+
+
+ /**
+ * Get the byte stream for this input source.
+ *
+ * <p>The getEncoding method will return the character
+ * encoding for this byte stream, or null if unknown.</p>
+ *
+ * @return The byte stream, or null if none was supplied.
+ * @see #getEncoding
+ * @see #setByteStream
+ */
+ public InputStream getByteStream ()
+ {
+ return byteStream;
+ }
+
+
+ /**
+ * Set the character encoding, if known.
+ *
+ * <p>The encoding must be a string acceptable for an
+ * XML encoding declaration (see section 4.3.3 of the XML 1.0
+ * recommendation).</p>
+ *
+ * <p>This method has no effect when the application provides a
+ * character stream.</p>
+ *
+ * @param encoding A string describing the character encoding.
+ * @see #setSystemId
+ * @see #setByteStream
+ * @see #getEncoding
+ */
+ public void setEncoding (String encoding)
+ {
+ this.encoding = encoding;
+ }
+
+
+ /**
+ * Get the character encoding for a byte stream or URI.
+ * This value will be ignored when the application provides a
+ * character stream.
+ *
+ * @return The encoding, or null if none was supplied.
+ * @see #setByteStream
+ * @see #getSystemId
+ * @see #getByteStream
+ */
+ public String getEncoding ()
+ {
+ return encoding;
+ }
+
+
+ /**
+ * Set the character stream for this input source.
+ *
+ * <p>If there is a character stream specified, the SAX parser
+ * will ignore any byte stream and will not attempt to open
+ * a URI connection to the system identifier.</p>
+ *
+ * @param characterStream The character stream containing the
+ * XML document or other entity.
+ * @see #getCharacterStream
+ * @see java.io.Reader
+ */
+ public void setCharacterStream (Reader characterStream)
+ {
+ this.characterStream = characterStream;
+ }
+
+
+ /**
+ * Get the character stream for this input source.
+ *
+ * @return The character stream, or null if none was supplied.
+ * @see #setCharacterStream
+ */
+ public Reader getCharacterStream ()
+ {
+ return characterStream;
+ }
+
+
+\f
+ ////////////////////////////////////////////////////////////////////
+ // Internal state.
+ ////////////////////////////////////////////////////////////////////
+
+ private String publicId;
+ private String systemId;
+ private InputStream byteStream;
+ private String encoding;
+ private Reader characterStream;
+
+}
+
+// end of InputSource.java
git://source.jalview.org / jalview.git / blobdiff