org.aspectj.bridge.SourceLocation Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of aspectjtools Show documentation
Show all versions of aspectjtools Show documentation
AspectJ tools most notably contains the AspectJ compiler (AJC). AJC applies aspects to Java classes during
compilation, fully replacing Javac for plain Java classes and also compiling native AspectJ or annotation-based
@AspectJ syntax. Furthermore, AJC can weave aspects into existing class files in a post-compile binary weaving step.
This library is a superset of AspectJ weaver and hence also of AspectJ runtime.
/* *******************************************************************
* Copyright (c) 1999-2001 Xerox Corporation,
* 2002 Palo Alto Research Center, Incorporated (PARC).
* All rights reserved.
* This program and the accompanying materials are made available
* under the terms of the Eclipse Public License v 2.0
* which accompanies this distribution and is available at
* https://www.eclipse.org/org/documents/epl-2.0/EPL-2.0.txt
*
* Contributors:
* Xerox/PARC initial implementation
* ******************************************************************/
package org.aspectj.bridge;
import java.io.File;
import org.aspectj.util.LangUtil;
/**
* Immutable source location. This guarantees that the source file is not null and that the numeric values are positive and line ≤
* endLine.
*
* @see org.aspectj.lang.reflect.SourceLocation
*/
public class SourceLocation implements ISourceLocation {
private static final long serialVersionUID = -5434765814401009794L;
private transient int cachedHashcode = -1;
/** used when SourceLocation is not available */
public static final ISourceLocation UNKNOWN = new SourceLocation(ISourceLocation.NO_FILE, 0, 0, 0);
private final File sourceFile;
private final int startLine;
private final int column;
private final int endLine;
private int offset;
private final String context;
private boolean noColumn;
private String sourceFileName;
/** @throws IllegalArgumentException if the input would not be a valid line */
public static final void validLine(int line) {
if (line < 0) {
throw new IllegalArgumentException("negative line: " + line);
} else if (line > ISourceLocation.MAX_LINE) {
throw new IllegalArgumentException("line too large: " + line);
}
}
/** @throws IllegalArgumentException if the input would not be a valid column */
public static final void validColumn(int column) {
if (column < 0) {
throw new IllegalArgumentException("negative column: " + column);
} else if (column > ISourceLocation.MAX_COLUMN) {
throw new IllegalArgumentException("column too large: " + column);
}
}
/**
* Same as SourceLocation(file, line, line, 0), except that column is not rendered during toString()
*/
public SourceLocation(File file, int line) {
this(file, line, line, NO_COLUMN);
}
/** same as SourceLocation(file, line, endLine, ISourceLocation.NO_COLUMN) */
public SourceLocation(File file, int line, int endLine) {
this(file, line, endLine, ISourceLocation.NO_COLUMN);
}
/**
* @param file File of the source; if null, use ISourceLocation.NO_FILE, not null
* @param line int starting line of the location - positive number
* @param endLine int ending line of the location - ≤ starting line
* @param column int character position of starting location - positive number
*/
public SourceLocation(File file, int line, int endLine, int column) {
this(file, line, endLine, column, (String) null);
}
public SourceLocation(File file, int line, int endLine, int column, String context) {
if (column == NO_COLUMN) {
column = 0;
noColumn = true;
}
if (null == file) {
file = ISourceLocation.NO_FILE;
}
validLine(line);
validLine(endLine);
LangUtil.throwIaxIfFalse(line <= endLine, line + " > " + endLine);
LangUtil.throwIaxIfFalse(column >= 0, "negative column: " + column);
this.sourceFile = file;
this.startLine = line;
this.column = column;
this.endLine = endLine;
this.context = context;
}
public SourceLocation(File file, int line, int endLine, int column, String context, String sourceFileName) {
this(file, line, endLine, column, context);
this.sourceFileName = sourceFileName;
}
public File getSourceFile() {
return sourceFile;
}
public int getLine() {
return startLine;
}
/**
* @return int actual column or 0 if not available per constructor treatment of ISourceLocation.NO_COLUMN
*/
public int getColumn() {
return column;
}
public int getEndLine() {
return endLine;
}
/** @return null String or application-specific context */
public String getContext() {
return context;
}
/** @return String {context\n}{file:}line{:column} */
public String toString() {
StringBuilder sb = new StringBuilder();
if (null != context) {
sb.append(context);
sb.append(LangUtil.EOL);
}
if (sourceFile != ISourceLocation.NO_FILE) {
sb.append(sourceFile.getPath());
}
if (startLine > 0) {
sb.append(":");
sb.append(startLine); // "" + startLine + "-" + endLine);
}
if (!noColumn) {
sb.append(":" + column);
}
if (offset >= 0) {
sb.append("::" + offset);
}
return sb.toString();
}
// XXX Ctors for this type should know about an offset, rather than
// it being set through these methods - but there are just too many
// ctors at the moment! It needs sorting out.
public int getOffset() {
return offset;
}
public void setOffset(int i) {
cachedHashcode = -1;
offset = i;
}
public String getSourceFileName() {
return sourceFileName;
}
public boolean equals(Object obj) {
if (!(obj instanceof SourceLocation)) {
return false;
}
SourceLocation o = (SourceLocation) obj;
return startLine == o.startLine && column == o.column && endLine == o.endLine && offset == o.offset
&& (sourceFile == null ? o.sourceFile == null : sourceFile.equals(o.sourceFile))
&& (context == null ? o.context == null : context.equals(o.context)) && noColumn == o.noColumn
&& (sourceFileName == null ? o.sourceFileName == null : sourceFileName.equals(o.sourceFileName));
}
public int hashCode() {
if (cachedHashcode == -1) {
cachedHashcode = (sourceFile == null ? 0 : sourceFile.hashCode());
cachedHashcode = cachedHashcode * 37 + startLine;
cachedHashcode = cachedHashcode * 37 + column;
cachedHashcode = cachedHashcode * 37 + endLine;
cachedHashcode = cachedHashcode * 37 + offset;
cachedHashcode = cachedHashcode * 37 + (context == null ? 0 : context.hashCode());
cachedHashcode = cachedHashcode * 37 + (noColumn ? 0 : 1);
cachedHashcode = cachedHashcode * 37 + (sourceFileName == null ? 0 : sourceFileName.hashCode());
}
return cachedHashcode;
}
}