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/* Copyright (C) 2003 Vladimir Roubtsov. All rights reserved.
*
* This program and the accompanying materials are made available under
* the terms of the Common Public License v1.0 which accompanies this distribution,
* and is available at http://www.eclipse.org/legal/cpl-v10.html
*
* $Id: AttributeCollection.java,v 1.1.1.1 2004/05/09 16:57:44 vlad_r Exp $
*/
package com.vladium.jcd.cls;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import com.vladium.jcd.cls.attribute.*;
import com.vladium.jcd.lib.UDataOutputStream;
import com.vladium.util.asserts.$assert;
// ----------------------------------------------------------------------------
/**
* @author (C) 2001, Vlad Roubtsov
*/
final class AttributeCollection implements IAttributeCollection
{
// public: ................................................................
// TODO: extend ItemCollection into all XXXCollection classes ?
// ACCESSORS:
public final Attribute_info get (final int offset)
{
return (Attribute_info) m_attributes.get (offset);
}
public final boolean hasSynthetic ()
{
return m_syntheticRefCount > 0;
}
public final boolean hasBridge ()
{
return m_bridgeRefCount > 0;
}
public final InnerClassesAttribute_info getInnerClassesAttribute ()
{
final int innerClassesAttributeOffset = m_innerClassesAttributeOffset;
if (innerClassesAttributeOffset < 0)
return null;
else
return (InnerClassesAttribute_info) get (innerClassesAttributeOffset);
}
public final int size ()
{
return m_attributes.size ();
}
public final long length ()
{
// TODO: cache?
long result = 2;
int _attributes_count = m_attributes.size (); // use size() if this class becomes non-final
for (int i = 0; i < _attributes_count; i++) result += get (i).length ();
return result;
}
// Cloneable:
/**
* Performs a deep copy.
*/
public Object clone ()
{
try
{
final AttributeCollection _clone = (AttributeCollection) super.clone ();
// deep clone:
final int attributes_count = m_attributes.size (); // use size() if this class becomes non-final
_clone.m_attributes = new ArrayList (attributes_count);
for (int a = 0; a < attributes_count; ++ a)
{
_clone.m_attributes.add (((Attribute_info) m_attributes.get (a)).clone ());
}
return _clone;
}
catch (CloneNotSupportedException e)
{
throw new InternalError (e.toString ());
}
}
// IClassFormatOutput:
public void writeInClassFormat (final UDataOutputStream out) throws IOException
{
int attributes_count = size ();
out.writeU2 (attributes_count);
for (int i = 0; i < attributes_count; i++)
{
get (i).writeInClassFormat (out);
}
}
// Visitor:
public void accept (final IClassDefVisitor visitor, final Object ctx)
{
visitor.visit (this, ctx);
}
// MUTATORS:
public int add (final Attribute_info attribute)
{
final List/* Attribute_info */ attributes = m_attributes;
final int result = attributes.size ();
attributes.add (attribute);
if (attribute instanceof SyntheticAttribute_info)
++ m_syntheticRefCount;
else if (attribute instanceof InnerClassesAttribute_info)
{
if (m_innerClassesAttributeOffset >= 0)
throw new IllegalArgumentException ("this attribute collection already has an InnerClasses attribute");
m_innerClassesAttributeOffset = result;
}
else if (attribute instanceof BridgeAttribute_info)
++ m_bridgeRefCount;
if (DISALLOW_MULTIPLE_SYNTHETIC_ATTRIBUTES && $assert.ENABLED)
$assert.ASSERT (m_syntheticRefCount >= 0 && m_syntheticRefCount <= 1,
"bad synthetic attribute count: " + m_syntheticRefCount);
return result;
}
public Attribute_info set (final int offset, final Attribute_info attribute)
{
final Attribute_info result = (Attribute_info) m_attributes.set (offset, attribute);
if (result instanceof SyntheticAttribute_info)
-- m_syntheticRefCount;
else if (result instanceof InnerClassesAttribute_info)
m_innerClassesAttributeOffset = -1;
else if (result instanceof BridgeAttribute_info)
-- m_bridgeRefCount;
if (attribute instanceof SyntheticAttribute_info)
++ m_syntheticRefCount;
else if (attribute instanceof InnerClassesAttribute_info)
m_innerClassesAttributeOffset = offset;
else if (attribute instanceof BridgeAttribute_info)
++ m_bridgeRefCount;
if (DISALLOW_MULTIPLE_SYNTHETIC_ATTRIBUTES && $assert.ENABLED)
$assert.ASSERT (m_syntheticRefCount >= 0 && m_syntheticRefCount <= 1,
"bad synthetic attribute count: " + m_syntheticRefCount);
return result;
}
public Attribute_info remove (final int offset)
{
final Attribute_info result = (Attribute_info) m_attributes.remove (offset);
if (result instanceof SyntheticAttribute_info)
-- m_syntheticRefCount;
else if (result instanceof InnerClassesAttribute_info)
m_innerClassesAttributeOffset = -1;
else if (result instanceof BridgeAttribute_info)
-- m_bridgeRefCount;
if (DISALLOW_MULTIPLE_SYNTHETIC_ATTRIBUTES && $assert.ENABLED)
$assert.ASSERT (m_syntheticRefCount >= 0 && m_syntheticRefCount <= 1,
"bad synthetic attribute count: " + m_syntheticRefCount);
return result;
}
// protected: .............................................................
// package: ...............................................................
AttributeCollection (final int capacity)
{
m_attributes = capacity < 0 ? new ArrayList () : new ArrayList (capacity);
m_innerClassesAttributeOffset = -1;
}
// private: ...............................................................
private List/* Attribute_info */ m_attributes; // never null
private transient int m_syntheticRefCount, m_bridgeRefCount;
private transient int m_innerClassesAttributeOffset;
// note: the spec does not disallow multiple synthetic attributes
private static final boolean DISALLOW_MULTIPLE_SYNTHETIC_ATTRIBUTES = false;
// note: the spec disallows multiple inner classes attributes
} // end of class
// ----------------------------------------------------------------------------
|
