1/* 2 * Copyright (c) 2004 World Wide Web Consortium, 3 * 4 * (Massachusetts Institute of Technology, European Research Consortium for 5 * Informatics and Mathematics, Keio University). All Rights Reserved. This 6 * work is distributed under the W3C(r) Software License [1] in the hope that 7 * it will be useful, but WITHOUT ANY WARRANTY; without even the implied 8 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 9 * 10 * [1] http://www.w3.org/Consortium/Legal/2002/copyright-software-20021231 11 */ 12 13package org.w3c.dom.ls; 14 15/** 16 * This interface represents an input source for data. 17 * <p> This interface allows an application to encapsulate information about 18 * an input source in a single object, which may include a public 19 * identifier, a system identifier, a byte stream (possibly with a specified 20 * encoding), a base URI, and/or a character stream. 21 * <p> The exact definitions of a byte stream and a character stream are 22 * binding dependent. 23 * <p> The application is expected to provide objects that implement this 24 * interface whenever such objects are needed. The application can either 25 * provide its own objects that implement this interface, or it can use the 26 * generic factory method <code>DOMImplementationLS.createLSInput()</code> 27 * to create objects that implement this interface. 28 * <p> The <code>LSParser</code> will use the <code>LSInput</code> object to 29 * determine how to read data. The <code>LSParser</code> will look at the 30 * different inputs specified in the <code>LSInput</code> in the following 31 * order to know which one to read from, the first one that is not null and 32 * not an empty string will be used: 33 * <ol> 34 * <li> <code>LSInput.characterStream</code> 35 * </li> 36 * <li> 37 * <code>LSInput.byteStream</code> 38 * </li> 39 * <li> <code>LSInput.stringData</code> 40 * </li> 41 * <li> 42 * <code>LSInput.systemId</code> 43 * </li> 44 * <li> <code>LSInput.publicId</code> 45 * </li> 46 * </ol> 47 * <p> If all inputs are null, the <code>LSParser</code> will report a 48 * <code>DOMError</code> with its <code>DOMError.type</code> set to 49 * <code>"no-input-specified"</code> and its <code>DOMError.severity</code> 50 * set to <code>DOMError.SEVERITY_FATAL_ERROR</code>. 51 * <p> <code>LSInput</code> objects belong to the application. The DOM 52 * implementation will never modify them (though it may make copies and 53 * modify the copies, if necessary). 54 * <p>See also the <a href='http://www.w3.org/TR/2004/REC-DOM-Level-3-LS-20040407'>Document Object Model (DOM) Level 3 Load 55and Save Specification</a>. 56 */ 57public interface LSInput { 58 /** 59 * An attribute of a language and binding dependent type that represents 60 * a stream of 16-bit units. The application must encode the stream 61 * using UTF-16 (defined in [Unicode] and in [ISO/IEC 10646]). It is not a requirement to have an XML declaration when 62 * using character streams. If an XML declaration is present, the value 63 * of the encoding attribute will be ignored. 64 */ 65 public java.io.Reader getCharacterStream(); 66 /** 67 * An attribute of a language and binding dependent type that represents 68 * a stream of 16-bit units. The application must encode the stream 69 * using UTF-16 (defined in [Unicode] and in [ISO/IEC 10646]). It is not a requirement to have an XML declaration when 70 * using character streams. If an XML declaration is present, the value 71 * of the encoding attribute will be ignored. 72 */ 73 public void setCharacterStream(java.io.Reader characterStream); 74 75 /** 76 * An attribute of a language and binding dependent type that represents 77 * a stream of bytes. 78 * <br> If the application knows the character encoding of the byte 79 * stream, it should set the encoding attribute. Setting the encoding in 80 * this way will override any encoding specified in an XML declaration 81 * in the data. 82 */ 83 public java.io.InputStream getByteStream(); 84 /** 85 * An attribute of a language and binding dependent type that represents 86 * a stream of bytes. 87 * <br> If the application knows the character encoding of the byte 88 * stream, it should set the encoding attribute. Setting the encoding in 89 * this way will override any encoding specified in an XML declaration 90 * in the data. 91 */ 92 public void setByteStream(java.io.InputStream byteStream); 93 94 /** 95 * String data to parse. If provided, this will always be treated as a 96 * sequence of 16-bit units (UTF-16 encoded characters). It is not a 97 * requirement to have an XML declaration when using 98 * <code>stringData</code>. If an XML declaration is present, the value 99 * of the encoding attribute will be ignored. 100 */ 101 public String getStringData(); 102 /** 103 * String data to parse. If provided, this will always be treated as a 104 * sequence of 16-bit units (UTF-16 encoded characters). It is not a 105 * requirement to have an XML declaration when using 106 * <code>stringData</code>. If an XML declaration is present, the value 107 * of the encoding attribute will be ignored. 108 */ 109 public void setStringData(String stringData); 110 111 /** 112 * The system identifier, a URI reference [<a href='http://www.ietf.org/rfc/rfc2396.txt'>IETF RFC 2396</a>], for this 113 * input source. The system identifier is optional if there is a byte 114 * stream, a character stream, or string data. It is still useful to 115 * provide one, since the application will use it to resolve any 116 * relative URIs and can include it in error messages and warnings. (The 117 * LSParser will only attempt to fetch the resource identified by the 118 * URI reference if there is no other input available in the input 119 * source.) 120 * <br> If the application knows the character encoding of the object 121 * pointed to by the system identifier, it can set the encoding using 122 * the <code>encoding</code> attribute. 123 * <br> If the specified system ID is a relative URI reference (see 124 * section 5 in [<a href='http://www.ietf.org/rfc/rfc2396.txt'>IETF RFC 2396</a>]), the DOM 125 * implementation will attempt to resolve the relative URI with the 126 * <code>baseURI</code> as the base, if that fails, the behavior is 127 * implementation dependent. 128 */ 129 public String getSystemId(); 130 /** 131 * The system identifier, a URI reference [<a href='http://www.ietf.org/rfc/rfc2396.txt'>IETF RFC 2396</a>], for this 132 * input source. The system identifier is optional if there is a byte 133 * stream, a character stream, or string data. It is still useful to 134 * provide one, since the application will use it to resolve any 135 * relative URIs and can include it in error messages and warnings. (The 136 * LSParser will only attempt to fetch the resource identified by the 137 * URI reference if there is no other input available in the input 138 * source.) 139 * <br> If the application knows the character encoding of the object 140 * pointed to by the system identifier, it can set the encoding using 141 * the <code>encoding</code> attribute. 142 * <br> If the specified system ID is a relative URI reference (see 143 * section 5 in [<a href='http://www.ietf.org/rfc/rfc2396.txt'>IETF RFC 2396</a>]), the DOM 144 * implementation will attempt to resolve the relative URI with the 145 * <code>baseURI</code> as the base, if that fails, the behavior is 146 * implementation dependent. 147 */ 148 public void setSystemId(String systemId); 149 150 /** 151 * The public identifier for this input source. This may be mapped to an 152 * input source using an implementation dependent mechanism (such as 153 * catalogues or other mappings). The public identifier, if specified, 154 * may also be reported as part of the location information when errors 155 * are reported. 156 */ 157 public String getPublicId(); 158 /** 159 * The public identifier for this input source. This may be mapped to an 160 * input source using an implementation dependent mechanism (such as 161 * catalogues or other mappings). The public identifier, if specified, 162 * may also be reported as part of the location information when errors 163 * are reported. 164 */ 165 public void setPublicId(String publicId); 166 167 /** 168 * The base URI to be used (see section 5.1.4 in [<a href='http://www.ietf.org/rfc/rfc2396.txt'>IETF RFC 2396</a>]) for 169 * resolving a relative <code>systemId</code> to an absolute URI. 170 * <br> If, when used, the base URI is itself a relative URI, an empty 171 * string, or null, the behavior is implementation dependent. 172 */ 173 public String getBaseURI(); 174 /** 175 * The base URI to be used (see section 5.1.4 in [<a href='http://www.ietf.org/rfc/rfc2396.txt'>IETF RFC 2396</a>]) for 176 * resolving a relative <code>systemId</code> to an absolute URI. 177 * <br> If, when used, the base URI is itself a relative URI, an empty 178 * string, or null, the behavior is implementation dependent. 179 */ 180 public void setBaseURI(String baseURI); 181 182 /** 183 * The character encoding, if known. The encoding must be a string 184 * acceptable for an XML encoding declaration ([<a href='http://www.w3.org/TR/2004/REC-xml-20040204'>XML 1.0</a>] section 185 * 4.3.3 "Character Encoding in Entities"). 186 * <br> This attribute has no effect when the application provides a 187 * character stream or string data. For other sources of input, an 188 * encoding specified by means of this attribute will override any 189 * encoding specified in the XML declaration or the Text declaration, or 190 * an encoding obtained from a higher level protocol, such as HTTP [<a href='http://www.ietf.org/rfc/rfc2616.txt'>IETF RFC 2616</a>]. 191 */ 192 public String getEncoding(); 193 /** 194 * The character encoding, if known. The encoding must be a string 195 * acceptable for an XML encoding declaration ([<a href='http://www.w3.org/TR/2004/REC-xml-20040204'>XML 1.0</a>] section 196 * 4.3.3 "Character Encoding in Entities"). 197 * <br> This attribute has no effect when the application provides a 198 * character stream or string data. For other sources of input, an 199 * encoding specified by means of this attribute will override any 200 * encoding specified in the XML declaration or the Text declaration, or 201 * an encoding obtained from a higher level protocol, such as HTTP [<a href='http://www.ietf.org/rfc/rfc2616.txt'>IETF RFC 2616</a>]. 202 */ 203 public void setEncoding(String encoding); 204 205 /** 206 * If set to true, assume that the input is certified (see section 2.13 207 * in [<a href='http://www.w3.org/TR/2004/REC-xml11-20040204/'>XML 1.1</a>]) when 208 * parsing [<a href='http://www.w3.org/TR/2004/REC-xml11-20040204/'>XML 1.1</a>]. 209 */ 210 public boolean getCertifiedText(); 211 /** 212 * If set to true, assume that the input is certified (see section 2.13 213 * in [<a href='http://www.w3.org/TR/2004/REC-xml11-20040204/'>XML 1.1</a>]) when 214 * parsing [<a href='http://www.w3.org/TR/2004/REC-xml11-20040204/'>XML 1.1</a>]. 215 */ 216 public void setCertifiedText(boolean certifiedText); 217 218} 219