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comparison graal/com.oracle.truffle.api/src/com/oracle/truffle/api/source/Source.java @ 19697:c152a485d747

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Truffle: new method Source.getLength() and semantic adjustments to the new factory method for creating files whose contents have already been read.
author Michael Van De Vanter <michael.van.de.vanter@oracle.com>
date Tue, 03 Mar 2015 17:55:10 -0800
parents 33bdafbf285d
children 191c55f08ed2
comparison
equal deleted inserted replaced
19696:9d2ff2e8360d 19697:c152a485d747
122 } 122 }
123 123
124 /** 124 /**
125 * Gets the canonical representation of a source file, whose contents have already been read and 125 * Gets the canonical representation of a source file, whose contents have already been read and
126 * need not be read again. It is confirmed that the file resolves to a file name, so it can be 126 * need not be read again. It is confirmed that the file resolves to a file name, so it can be
127 * indexed by canonical path, but it is not confirmed to be readable. 127 * indexed by canonical path. It is not confirmed that the text supplied agrees with the file's
128 * contents or even whether the file is readable.
128 * 129 *
129 * @param chars textual source code already read from the file 130 * @param chars textual source code already read from the file
130 * @param fileName 131 * @param fileName
131 * @return canonical representation of the file's contents. 132 * @return canonical representation of the file's contents.
132 * @throws IOException if the file cannot be found 133 * @throws IOException if the file cannot be found
133 * @throws IllegalArgumentException if there is already a Source indexed under this file name 134 */
134 */ 135 public static Source fromFileName(CharSequence chars, String fileName) throws IOException {
135 public static Source fromFileName(CharSequence chars, String fileName) throws IOException, IllegalArgumentException { 136
136 final WeakReference<Source> nameRef = filePathToSource.get(fileName); 137 final WeakReference<Source> nameRef = filePathToSource.get(fileName);
137 Source source = nameRef == null ? null : nameRef.get(); 138 Source source = nameRef == null ? null : nameRef.get();
138 if (source == null) { 139 if (source == null) {
139 final File file = new File(fileName); 140 final File file = new File(fileName);
140 // We are going to trust that the fileName is readable. 141 // We are going to trust that the fileName is readable.
142 final WeakReference<Source> pathRef = filePathToSource.get(path); 143 final WeakReference<Source> pathRef = filePathToSource.get(path);
143 source = pathRef == null ? null : pathRef.get(); 144 source = pathRef == null ? null : pathRef.get();
144 if (source == null) { 145 if (source == null) {
145 source = new FileSource(file, fileName, path, chars); 146 source = new FileSource(file, fileName, path, chars);
146 filePathToSource.put(path, new WeakReference<>(source)); 147 filePathToSource.put(path, new WeakReference<>(source));
147 return source; 148 }
148 } 149 }
149 } 150 return source;
150 throw new IOException("Source already exists for file:" + fileName);
151 } 151 }
152 152
153 /** 153 /**
154 * Creates a non-canonical source from literal text. If an already created literal source must 154 * Creates a non-canonical source from literal text. If an already created literal source must
155 * be retrievable by name, use {@link #asPseudoFile(CharSequence, String)}. 155 * be retrievable by name, use {@link #asPseudoFile(CharSequence, String)}.
299 /** 299 /**
300 * Access to the source contents. 300 * Access to the source contents.
301 */ 301 */
302 public final InputStream getInputStream() { 302 public final InputStream getInputStream() {
303 return new ByteArrayInputStream(getCode().getBytes()); 303 return new ByteArrayInputStream(getCode().getBytes());
304 }
305
306 /**
307 * Gets the number of characters in the source.
308 */
309 public final int getLength() {
310 return checkTextMap().length();
304 } 311 }
305 312
306 /** 313 /**
307 * Returns the complete text of the code. 314 * Returns the complete text of the code.
308 */ 315 */
1134 public int offsetToCol(int offset) throws IllegalArgumentException { 1141 public int offsetToCol(int offset) throws IllegalArgumentException {
1135 return 1 + offset - nlOffsets[offsetToLine(offset) - 1]; 1142 return 1 + offset - nlOffsets[offsetToLine(offset) - 1];
1136 } 1143 }
1137 1144
1138 /** 1145 /**
1146 * The number of characters in the mapped text.
1147 */
1148 public int length() {
1149 return textLength;
1150 }
1151
1152 /**
1139 * The number of lines in the text; if characters appear after the final newline, then they 1153 * The number of lines in the text; if characters appear after the final newline, then they
1140 * also count as a line, even though not newline-terminated. 1154 * also count as a line, even though not newline-terminated.
1141 */ 1155 */
1142 public int lineCount() { 1156 public int lineCount() {
1143 if (textLength == 0) { 1157 if (textLength == 0) {