File	Doc	Category	Size	Date	Package
LineNumberTable.java	API Doc	Java SE 5 API	7834	Fri Aug 26 14:55:18 BST 2005	com.sun.org.apache.bcel.internal.classfile

LineNumberTable

• java.lang.Object
  • com.sun.org.apache.bcel.internal.classfile.Attribute

Fields Summary
private int	line_number_table_length
private LineNumber[]	line_number_table

Constructors Summary
public LineNumberTable(LineNumberTable c) this(c.getNameIndex(), c.getLength(), c.getLineNumberTable(), c.getConstantPool());
public LineNumberTable(int name_index, int length, LineNumber[] line_number_table, ConstantPool constant_pool) super(Constants.ATTR_LINE_NUMBER_TABLE, name_index, length, constant_pool); setLineNumberTable(line_number_table);
LineNumberTable(int name_index, int length, DataInputStream file, ConstantPool constant_pool) Construct object from file stream. param name_index Index of name param length Content length in bytes param file Input stream throw IOException param constant_pool Array of constants this(name_index, length, (LineNumber[])null, constant_pool); line_number_table_length = (file.readUnsignedShort()); line_number_table = new LineNumber[line_number_table_length]; for(int i=0; i < line_number_table_length; i++) line_number_table[i] = new LineNumber(file);

Methods Summary
public void	accept(com.sun.org.apache.bcel.internal.classfile.Visitor v) Called by objects that are traversing the nodes of the tree implicitely defined by the contents of a Java class. I.e., the hierarchy of methods, fields, attributes, etc. spawns a tree of objects. param v Visitor object v.visitLineNumberTable(this);
public com.sun.org.apache.bcel.internal.classfile.Attribute	copy(com.sun.org.apache.bcel.internal.classfile.ConstantPool constant_pool) return deep copy of this attribute LineNumberTable c = (LineNumberTable)clone(); c.line_number_table = new LineNumber[line_number_table_length]; for(int i=0; i < line_number_table_length; i++) c.line_number_table[i] = line_number_table[i].copy(); c.constant_pool = constant_pool; return c;
public final void	dump(java.io.DataOutputStream file) Dump line number table attribute to file stream in binary format. param file Output file stream throw IOException super.dump(file); file.writeShort(line_number_table_length); for(int i=0; i < line_number_table_length; i++) line_number_table[i].dump(file);
public final com.sun.org.apache.bcel.internal.classfile.LineNumber[]	getLineNumberTable() return Array of (pc offset, line number) pairs. return line_number_table;
public int	getSourceLine(int pos) Map byte code positions to source code lines. param pos byte code offset return corresponding line in source code int l = 0, r = line_number_table_length-1; if(r < 0) // array is empty return -1; int min_index = -1, min=-1; /* Do a binary search since the array is ordered. */ do { int i = (l + r) / 2; int j = line_number_table[i].getStartPC(); if(j == pos) return line_number_table[i].getLineNumber(); else if(pos < j) // else constrain search area r = i - 1; else // pos > j l = i + 1; /* If exact match can't be found (which is the most common case) * return the line number that corresponds to the greatest index less * than pos. */ if(j < pos && j > min) { min = j; min_index = i; } } while(l <= r); return line_number_table[min_index].getLineNumber();
public final int	getTableLength() return line_number_table_length;
public final void	setLineNumberTable(com.sun.org.apache.bcel.internal.classfile.LineNumber[] line_number_table) param line_number_table. this.line_number_table = line_number_table; line_number_table_length = (line_number_table == null)? 0 : line_number_table.length;
public final java.lang.String	toString() return String representation. StringBuffer buf = new StringBuffer(); StringBuffer line = new StringBuffer(); for(int i=0; i < line_number_table_length; i++) { line.append(line_number_table[i].toString()); if(i < line_number_table_length - 1) line.append(", "); if(line.length() > 72) { line.append('\n"); buf.append(line); line.setLength(0); } } buf.append(line); return buf.toString();