* <http://www.apache.org/>.
*/
-import org.aspectj.apache.bcel.Constants;
-import java.io.*;
+import java.io.ByteArrayInputStream;
+import java.io.DataInputStream;
+import java.io.DataOutputStream;
+import java.io.IOException;
+
+import org.aspectj.apache.bcel.Constants;
/**
- * This class represents collection of local variables in a
- * method. This attribute is contained in the <em>Code</em> attribute.
- *
- * @version $Id: LocalVariableTable.java,v 1.5 2008/08/26 15:00:57 aclement Exp $
- * @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A>
- * @see Code
- * @see LocalVariable
+ * This class represents collection of local variables in a method. This attribute is contained in the <em>Code</em> attribute.
*
- * Updates: Andy 14Feb06 - Made unpacking of the data lazy, depending on someone
- * actually asking for it.
+ * @version $Id: LocalVariableTable.java,v 1.6 2009/03/17 01:16:25 aclement Exp $
+ * @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A>
+ * @see Code
+ * @see LocalVariable Updates: Andy 14Feb06 - Made unpacking of the data lazy, depending on someone actually asking for it.
*/
public class LocalVariableTable extends Attribute {
-
- // if 'isInPackedState' then this data needs unpacking
- private boolean isInPackedState = false;
- private byte[] data;
-
- private int localVariableTableLength;
- private LocalVariable[] localVariableTable;
-
-
- /**
- * 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
- {
- super(Constants.ATTR_LOCAL_VARIABLE_TABLE,name_index, length, constant_pool);
- data = new byte[length];
- file.read(data);
- isInPackedState = true;
- // assert(bytesRead==length)
- }
-
-
-
- /**
- * 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(ClassVisitor v) {
- unpack();
- 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);
- if (isInPackedState) {
- file.write(data);
- } else {
- file.writeShort(localVariableTableLength);
- for(int i=0; i < localVariableTableLength; i++)
- localVariableTable[i].dump(file);
- }
- }
-
- /**
- * @return Array of local variables of method.
- */
- public final LocalVariable[] getLocalVariableTable() {
- unpack();
- return localVariableTable;
- }
-
- /** @return first matching variable using index
- */
- public final LocalVariable getLocalVariable(int index) {
- unpack();
- for(int i=0; i < localVariableTableLength; i++)
- if (localVariableTable[i].getIndex() == index) return localVariableTable[i];
- return null;
- }
-
- public final void setLocalVariableTable(LocalVariable[] local_variable_table)
- {
- data=null;
- isInPackedState=false;
- this.localVariableTable = local_variable_table;
- localVariableTableLength = (local_variable_table == null)? 0 :
- local_variable_table.length;
- }
-
- /**
- * @return String representation.
- */
- public final String toString() {
- StringBuffer buf = new StringBuffer("");
- unpack();
- for(int i=0; i < localVariableTableLength; i++) {
- buf.append(localVariableTable[i].toString());
-
- if(i < localVariableTableLength - 1)
- buf.append('\n');
- }
-
- return buf.toString();
- }
-
- /**
- * @return deep copy of this attribute
- */
- public Attribute copy(ConstantPool constant_pool) {
- unpack();
- LocalVariableTable c = (LocalVariableTable)clone();
-
- c.localVariableTable = new LocalVariable[localVariableTableLength];
- for(int i=0; i < localVariableTableLength; i++)
- c.localVariableTable[i] = localVariableTable[i].copy();
-
- c.constantPool = constant_pool;
- return c;
- }
-
- public final int getTableLength() {
- unpack();
- return localVariableTableLength;
- }
-
- // ---
- // Unpacks the byte array into the table
- private void unpack() {
- if (!isInPackedState) return;
- try {
- ByteArrayInputStream bs = new ByteArrayInputStream(data);
- DataInputStream dis = new DataInputStream(bs);
- localVariableTableLength = (dis.readUnsignedShort());
- localVariableTable = new LocalVariable[localVariableTableLength];
- for (int i=0; i < localVariableTableLength; i++)
- localVariableTable[i] = new LocalVariable(dis,constantPool);
- dis.close();
- data = null; // throw it away now
- } catch (IOException e) {
- throw new RuntimeException("Unpacking of LocalVariableTable attribute failed");
+
+ // if 'isInPackedState' then this data needs unpacking
+ private boolean isInPackedState = false;
+ private byte[] data;
+
+ private int localVariableTableLength;
+ private LocalVariable[] localVariableTable;
+
+ /**
+ * 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 {
+ super(Constants.ATTR_LOCAL_VARIABLE_TABLE, name_index, length, constant_pool);
+ data = new byte[length];
+ file.read(data);
+ isInPackedState = true;
+ // assert(bytesRead==length)
+ }
+
+ /**
+ * 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(ClassVisitor v) {
+ unpack();
+ 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);
+ if (isInPackedState) {
+ file.write(data);
+ } else {
+ file.writeShort(localVariableTableLength);
+ for (int i = 0; i < localVariableTableLength; i++)
+ localVariableTable[i].dump(file);
+ }
+ }
+
+ /**
+ * @return Array of local variables of method.
+ */
+ public final LocalVariable[] getLocalVariableTable() {
+ unpack();
+ return localVariableTable;
+ }
+
+ /**
+ * @return first matching variable using index
+ */
+ public final LocalVariable getLocalVariable(int index) {
+ unpack();
+ for (int i = 0; i < localVariableTableLength; i++) {
+ if (localVariableTable[i] != null && localVariableTable[i].getIndex() == index) {
+ return localVariableTable[i];
+ }
+ }
+ return null;
+ }
+
+ public final void setLocalVariableTable(LocalVariable[] local_variable_table) {
+ data = null;
+ isInPackedState = false;
+ this.localVariableTable = local_variable_table;
+ localVariableTableLength = (local_variable_table == null) ? 0 : local_variable_table.length;
+ }
+
+ /**
+ * @return String representation.
+ */
+ public final String toString() {
+ StringBuffer buf = new StringBuffer("");
+ unpack();
+ for (int i = 0; i < localVariableTableLength; i++) {
+ buf.append(localVariableTable[i].toString());
+
+ if (i < localVariableTableLength - 1)
+ buf.append('\n');
+ }
+
+ return buf.toString();
+ }
+
+ /**
+ * @return deep copy of this attribute
+ */
+ public Attribute copy(ConstantPool constant_pool) {
+ unpack();
+ LocalVariableTable c = (LocalVariableTable) clone();
+
+ c.localVariableTable = new LocalVariable[localVariableTableLength];
+ for (int i = 0; i < localVariableTableLength; i++)
+ c.localVariableTable[i] = localVariableTable[i].copy();
+
+ c.constantPool = constant_pool;
+ return c;
+ }
+
+ public final int getTableLength() {
+ unpack();
+ return localVariableTableLength;
+ }
+
+ // ---
+ // Unpacks the byte array into the table
+ private void unpack() {
+ if (!isInPackedState)
+ return;
+ try {
+ ByteArrayInputStream bs = new ByteArrayInputStream(data);
+ DataInputStream dis = new DataInputStream(bs);
+ localVariableTableLength = (dis.readUnsignedShort());
+ localVariableTable = new LocalVariable[localVariableTableLength];
+ for (int i = 0; i < localVariableTableLength; i++)
+ localVariableTable[i] = new LocalVariable(dis, constantPool);
+ dis.close();
+ data = null; // throw it away now
+ } catch (IOException e) {
+ throw new RuntimeException("Unpacking of LocalVariableTable attribute failed");
+ }
+ isInPackedState = false;
}
- isInPackedState=false;
- }
}
projects / aspectj.git / commitdiff