EntryReference.java

/*******************************************************************************
 * Copyright (c) 2015 Jeff Martin.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the GNU Lesser General Public
 * License v3.0 which accompanies this distribution, and is available at
 * http://www.gnu.org/licenses/lgpl.html
 *
 * Contributors:
 * Jeff Martin - initial API and implementation
 ******************************************************************************/
package cuchaz.enigma.analysis;

import java.util.Arrays;
import java.util.List;

import cuchaz.enigma.Util;
import cuchaz.enigma.mapping.ClassEntry;
import cuchaz.enigma.mapping.ConstructorEntry;
import cuchaz.enigma.mapping.Entry;

public class EntryReference<E extends Entry, C extends Entry>
{
	
	private static final List<String> ConstructorNonNames = Arrays.asList(
		"this", "super", "static");
	public E entry;
	public C context;
	
	private boolean m_isNamed;
	
	public EntryReference(E entry, String sourceName)
	{
		this(entry, sourceName, null);
	}
	
	public EntryReference(E entry, String sourceName, C context)
	{
		if(entry == null)
			throw new IllegalArgumentException("Entry cannot be null!");
		
		this.entry = entry;
		this.context = context;
		
		m_isNamed = sourceName != null && sourceName.length() > 0;
		if(entry instanceof ConstructorEntry
			&& ConstructorNonNames.contains(sourceName))
			m_isNamed = false;
	}
	
	public EntryReference(E entry, C context, EntryReference<E, C> other)
	{
		this.entry = entry;
		this.context = context;
		m_isNamed = other.m_isNamed;
	}
	
	public ClassEntry getLocationClassEntry()
	{
		if(context != null)
			return context.getClassEntry();
		return entry.getClassEntry();
	}
	
	public boolean isNamed()
	{
		return m_isNamed;
	}
	
	public Entry getNameableEntry()
	{
		if(entry instanceof ConstructorEntry)
			// renaming a constructor really means renaming the class
			return entry.getClassEntry();
		return entry;
	}
	
	public String getNamableName()
	{
		if(getNameableEntry() instanceof ClassEntry)
		{
			ClassEntry classEntry = (ClassEntry)getNameableEntry();
			if(classEntry.isInnerClass())
				// make sure we only rename the inner class name
				return classEntry.getInnermostClassName();
		}
		
		return getNameableEntry().getName();
	}
	
	@Override
	public int hashCode()
	{
		if(context != null)
			return Util.combineHashesOrdered(entry.hashCode(),
				context.hashCode());
		return entry.hashCode();
	}
	
	@Override
	public boolean equals(Object other)
	{
		if(other instanceof EntryReference)
			return equals((EntryReference<?, ?>)other);
		return false;
	}
	
	public boolean equals(EntryReference<?, ?> other)
	{
		// check entry first
		boolean isEntrySame = entry.equals(other.entry);
		if(!isEntrySame)
			return false;
		
		// check caller
		if(context == null && other.context == null)
			return true;
		else if(context != null && other.context != null)
			return context.equals(other.context);
		return false;
	}
	
	@Override
	public String toString()
	{
		StringBuilder buf = new StringBuilder();
		buf.append(entry);
		if(context != null)
		{
			buf.append(" called from ");
			buf.append(context);
		}
		return buf.toString();
	}
}