< prev index next >

src/java.xml/share/classes/com/sun/org/apache/bcel/internal/classfile/LocalVariableTable.java

Print this page

        

*** 19,163 **** * limitations under the License. */ package com.sun.org.apache.bcel.internal.classfile; ! import com.sun.org.apache.bcel.internal.Constants; ! import java.io.*; /** * This class represents colection of local variables in a * method. This attribute is contained in the <em>Code</em> attribute. * ! * @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A> * @see Code * @see LocalVariable */ public class LocalVariableTable extends Attribute { ! private int local_variable_table_length; // Table of local private LocalVariable[] local_variable_table; // variables /** * Initialize from another object. Note that both objects use the same * references (shallow copy). Use copy() for a physical copy. */ ! public LocalVariableTable(LocalVariableTable c) { ! this(c.getNameIndex(), c.getLength(), c.getLocalVariableTable(), ! c.getConstantPool()); } /** * @param name_index Index in constant pool to `LocalVariableTable' * @param length Content length in bytes * @param local_variable_table Table of local variables * @param constant_pool Array of constants */ ! public LocalVariableTable(int name_index, int length, ! LocalVariable[] local_variable_table, ! ConstantPool constant_pool) ! { ! super(Constants.ATTR_LOCAL_VARIABLE_TABLE, name_index, length, constant_pool); ! setLocalVariableTable(local_variable_table); } /** ! * Construct object from file stream. * @param name_index Index in constant pool * @param length Content length in bytes ! * @param file Input stream * @param constant_pool Array of constants * @throws IOException */ ! LocalVariableTable(int name_index, int length, DataInputStream file, ! ConstantPool constant_pool) throws IOException ! { ! this(name_index, length, (LocalVariable[])null, constant_pool); ! ! local_variable_table_length = (file.readUnsignedShort()); local_variable_table = new LocalVariable[local_variable_table_length]; ! ! for(int i=0; i < local_variable_table_length; i++) ! local_variable_table[i] = new LocalVariable(file, constant_pool); } /** * 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 */ ! public void accept(Visitor v) { v.visitLocalVariableTable(this); } /** * Dump local variable table attribute to file stream in binary format. * * @param file Output file stream * @throws IOException */ ! public final void dump(DataOutputStream file) throws IOException ! { super.dump(file); ! file.writeShort(local_variable_table_length); ! for(int i=0; i < local_variable_table_length; i++) ! local_variable_table[i].dump(file); } /** * @return Array of local variables of method. */ public final LocalVariable[] getLocalVariableTable() { return local_variable_table; } ! /** @return first matching variable using index */ ! public final LocalVariable getLocalVariable(int index) { ! for(int i=0; i < local_variable_table_length; i++) ! if(local_variable_table[i].getIndex() == index) ! return local_variable_table[i]; return null; } ! public final void setLocalVariableTable(LocalVariable[] local_variable_table) ! { this.local_variable_table = local_variable_table; - local_variable_table_length = (local_variable_table == null)? 0 : - local_variable_table.length; } /** * @return String representation. */ public final String toString() { ! StringBuffer buf = new StringBuffer(""); ! ! for(int i=0; i < local_variable_table_length; i++) { ! buf.append(local_variable_table[i].toString()); ! ! if(i < local_variable_table_length - 1) buf.append('\n'); } ! return buf.toString(); } /** * @return deep copy of this attribute */ ! public Attribute copy(ConstantPool constant_pool) { ! LocalVariableTable c = (LocalVariableTable)clone(); ! ! c.local_variable_table = new LocalVariable[local_variable_table_length]; ! for(int i=0; i < local_variable_table_length; i++) c.local_variable_table[i] = local_variable_table[i].copy(); ! ! c.constant_pool = constant_pool; return c; } ! public final int getTableLength() { return local_variable_table_length; } } --- 19,201 ---- * limitations under the License. */ package com.sun.org.apache.bcel.internal.classfile; + import java.io.DataInput; + import java.io.DataOutputStream; + import java.io.IOException; ! import com.sun.org.apache.bcel.internal.Const; /** * This class represents colection of local variables in a * method. This attribute is contained in the <em>Code</em> attribute. * ! * @version $Id: LocalVariableTable.java 1749603 2016-06-21 20:50:19Z ggregory $ * @see Code * @see LocalVariable */ public class LocalVariableTable extends Attribute { ! private LocalVariable[] local_variable_table; // variables + /** * Initialize from another object. Note that both objects use the same * references (shallow copy). Use copy() for a physical copy. */ ! public LocalVariableTable(final LocalVariableTable c) { ! this(c.getNameIndex(), c.getLength(), c.getLocalVariableTable(), c.getConstantPool()); } + /** * @param name_index Index in constant pool to `LocalVariableTable' * @param length Content length in bytes * @param local_variable_table Table of local variables * @param constant_pool Array of constants */ ! public LocalVariableTable(final int name_index, final int length, final LocalVariable[] local_variable_table, ! final ConstantPool constant_pool) { ! super(Const.ATTR_LOCAL_VARIABLE_TABLE, name_index, length, constant_pool); ! this.local_variable_table = local_variable_table; } + /** ! * Construct object from input stream. * @param name_index Index in constant pool * @param length Content length in bytes ! * @param input Input stream * @param constant_pool Array of constants * @throws IOException */ ! LocalVariableTable(final int name_index, final int length, final DataInput input, final ConstantPool constant_pool) ! throws IOException { ! this(name_index, length, (LocalVariable[]) null, constant_pool); ! final int local_variable_table_length = input.readUnsignedShort(); local_variable_table = new LocalVariable[local_variable_table_length]; ! for (int i = 0; i < local_variable_table_length; i++) { ! local_variable_table[i] = new LocalVariable(input, constant_pool); ! } } + /** * 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 */ ! @Override ! public void accept( final Visitor v ) { v.visitLocalVariableTable(this); } + /** * Dump local variable table attribute to file stream in binary format. * * @param file Output file stream * @throws IOException */ ! @Override ! public final void dump( final DataOutputStream file ) throws IOException { super.dump(file); ! file.writeShort(local_variable_table.length); ! for (final LocalVariable variable : local_variable_table) { ! variable.dump(file); ! } } + /** * @return Array of local variables of method. */ public final LocalVariable[] getLocalVariableTable() { return local_variable_table; } ! ! /** ! * ! * @param index the variable slot ! * ! * @return the first LocalVariable that matches the slot or null if not found ! * ! * @deprecated since 5.2 because multiple variables can share the ! * same slot, use getLocalVariable(int index, int pc) instead. */ ! @java.lang.Deprecated ! public final LocalVariable getLocalVariable( final int index ) { ! for (final LocalVariable variable : local_variable_table) { ! if (variable.getIndex() == index) { ! return variable; ! } ! } ! return null; ! } + + /** + * + * @param index the variable slot + * @param pc the current pc that this variable is alive + * + * @return the LocalVariable that matches or null if not found + */ + public final LocalVariable getLocalVariable( final int index, final int pc ) { + for (final LocalVariable variable : local_variable_table) { + if (variable.getIndex() == index) { + final int start_pc = variable.getStartPC(); + final int end_pc = start_pc + variable.getLength(); + if ((pc >= start_pc) && (pc <= end_pc)) { + return variable; + } + } + } return null; } ! ! public final void setLocalVariableTable( final LocalVariable[] local_variable_table ) { this.local_variable_table = local_variable_table; } + /** * @return String representation. */ + @Override public final String toString() { ! final StringBuilder buf = new StringBuilder(); ! for (int i = 0; i < local_variable_table.length; i++) { ! buf.append(local_variable_table[i]); ! if (i < local_variable_table.length - 1) { buf.append('\n'); } ! } return buf.toString(); } + /** * @return deep copy of this attribute */ ! @Override ! public Attribute copy( final ConstantPool _constant_pool ) { ! final LocalVariableTable c = (LocalVariableTable) clone(); ! c.local_variable_table = new LocalVariable[local_variable_table.length]; ! for (int i = 0; i < local_variable_table.length; i++) { c.local_variable_table[i] = local_variable_table[i].copy(); ! } ! c.setConstantPool(_constant_pool); return c; } ! ! public final int getTableLength() { ! return local_variable_table == null ? 0 : local_variable_table.length; ! } }
< prev index next >