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src/java.xml/share/classes/com/sun/org/apache/bcel/internal/classfile/ExceptionTable.java
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@@ -19,151 +19,168 @@
* 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.Constants;
-import java.io.*;
+import com.sun.org.apache.bcel.internal.Const;
/**
* This class represents the table of exceptions that are thrown by a
* method. This attribute may be used once per method. The name of
* this class is <em>ExceptionTable</em> for historical reasons; The
* Java Virtual Machine Specification, Second Edition defines this
* attribute using the name <em>Exceptions</em> (which is inconsistent
* with the other classes).
*
- * @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A>
+ * @version $Id: ExceptionTable.java 1749603 2016-06-21 20:50:19Z ggregory $
* @see Code
*/
public final class ExceptionTable extends Attribute {
- private int number_of_exceptions; // Table of indices into
+
private int[] exception_index_table; // constant pool
+
/**
* Initialize from another object. Note that both objects use the same
* references (shallow copy). Use copy() for a physical copy.
*/
- public ExceptionTable(ExceptionTable c) {
- this(c.getNameIndex(), c.getLength(), c.getExceptionIndexTable(),
- c.getConstantPool());
+ public ExceptionTable(final ExceptionTable c) {
+ this(c.getNameIndex(), c.getLength(), c.getExceptionIndexTable(), c.getConstantPool());
}
+
/**
* @param name_index Index in constant pool
* @param length Content length in bytes
* @param exception_index_table Table of indices in constant pool
* @param constant_pool Array of constants
*/
- public ExceptionTable(int name_index, int length,
- int[] exception_index_table,
- ConstantPool constant_pool)
- {
- super(Constants.ATTR_EXCEPTIONS, name_index, length, constant_pool);
- setExceptionIndexTable(exception_index_table);
+ public ExceptionTable(final int name_index, final int length, final int[] exception_index_table,
+ final ConstantPool constant_pool) {
+ super(Const.ATTR_EXCEPTIONS, name_index, length, constant_pool);
+ this.exception_index_table = exception_index_table != null ? exception_index_table : new int[0];
}
+
/**
- * Construct object from file stream.
+ * Construct object from input stream.
* @param name_index Index in constant pool
* @param length Content length in bytes
- * @param file Input stream
+ * @param input Input stream
* @param constant_pool Array of constants
* @throws IOException
*/
- ExceptionTable(int name_index, int length, DataInputStream file,
- ConstantPool constant_pool) throws IOException
- {
- this(name_index, length, (int[])null, constant_pool);
-
- number_of_exceptions = file.readUnsignedShort();
+ ExceptionTable(final int name_index, final int length, final DataInput input, final ConstantPool constant_pool) throws IOException {
+ this(name_index, length, (int[]) null, constant_pool);
+ final int number_of_exceptions = input.readUnsignedShort();
exception_index_table = new int[number_of_exceptions];
-
- for(int i=0; i < number_of_exceptions; i++)
- exception_index_table[i] = file.readUnsignedShort();
+ for (int i = 0; i < number_of_exceptions; i++) {
+ exception_index_table[i] = input.readUnsignedShort();
+ }
}
+
/**
* 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) {
+ @Override
+ public void accept( final Visitor v ) {
v.visitExceptionTable(this);
}
+
/**
* Dump exceptions attribute to file stream in binary format.
*
* @param file Output file stream
* @throws IOException
*/
- public final void dump(DataOutputStream file) throws IOException
- {
+ @Override
+ public final void dump( final DataOutputStream file ) throws IOException {
super.dump(file);
- file.writeShort(number_of_exceptions);
- for(int i=0; i < number_of_exceptions; i++)
- file.writeShort(exception_index_table[i]);
+ file.writeShort(exception_index_table.length);
+ for (final int index : exception_index_table) {
+ file.writeShort(index);
+ }
}
+
/**
* @return Array of indices into constant pool of thrown exceptions.
*/
- public final int[] getExceptionIndexTable() {return exception_index_table;}
+ public final int[] getExceptionIndexTable() {
+ return exception_index_table;
+ }
+
+
/**
* @return Length of exception table.
*/
- public final int getNumberOfExceptions() { return number_of_exceptions; }
+ public final int getNumberOfExceptions() {
+ return exception_index_table == null ? 0 : exception_index_table.length;
+ }
+
/**
* @return class names of thrown exceptions
*/
public final String[] getExceptionNames() {
- String[] names = new String[number_of_exceptions];
- for(int i=0; i < number_of_exceptions; i++)
- names[i] = constant_pool.getConstantString(exception_index_table[i],
- Constants.CONSTANT_Class).
- replace('/', '.');
+ final String[] names = new String[exception_index_table.length];
+ for (int i = 0; i < exception_index_table.length; i++) {
+ names[i] = super.getConstantPool().getConstantString(exception_index_table[i],
+ Const.CONSTANT_Class).replace('/', '.');
+ }
return names;
}
+
/**
- * @param exception_index_table.
+ * @param exception_index_table the list of exception indexes
* Also redefines number_of_exceptions according to table length.
*/
- public final void setExceptionIndexTable(int[] exception_index_table) {
- this.exception_index_table = exception_index_table;
- number_of_exceptions = (exception_index_table == null)? 0 :
- exception_index_table.length;
+ public final void setExceptionIndexTable( final int[] exception_index_table ) {
+ this.exception_index_table = exception_index_table != null ? exception_index_table : new int[0];
}
+
+
/**
* @return String representation, i.e., a list of thrown exceptions.
*/
+ @Override
public final String toString() {
- StringBuffer buf = new StringBuffer("");
+ final StringBuilder buf = new StringBuilder();
String str;
-
- for(int i=0; i < number_of_exceptions; i++) {
- str = constant_pool.getConstantString(exception_index_table[i],
- Constants.CONSTANT_Class);
+ buf.append("Exceptions: ");
+ for (int i = 0; i < exception_index_table.length; i++) {
+ str = super.getConstantPool().getConstantString(exception_index_table[i], Const.CONSTANT_Class);
buf.append(Utility.compactClassName(str, false));
-
- if(i < number_of_exceptions - 1)
+ if (i < exception_index_table.length - 1) {
buf.append(", ");
}
-
+ }
return buf.toString();
}
+
/**
* @return deep copy of this attribute
*/
- public Attribute copy(ConstantPool constant_pool) {
- ExceptionTable c = (ExceptionTable)clone();
- c.exception_index_table = (int[])exception_index_table.clone();
- c.constant_pool = constant_pool;
+ @Override
+ public Attribute copy( final ConstantPool _constant_pool ) {
+ final ExceptionTable c = (ExceptionTable) clone();
+ if (exception_index_table != null) {
+ c.exception_index_table = new int[exception_index_table.length];
+ System.arraycopy(exception_index_table, 0, c.exception_index_table, 0,
+ exception_index_table.length);
+ }
+ c.setConstantPool(_constant_pool);
return c;
}
}
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