path: root/core/org.eclipse.cdt.ui.tests/src/org/eclipse/cdt/ui/tests/DOMAST/DOMASTNodeLeaf.java

/*******************************************************************************
 * Copyright (c) 2005, 2016 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *    IBM Rational Software - Initial API and implementation 
 *******************************************************************************/
package org.eclipse.cdt.ui.tests.DOMAST;

import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.Arrays;
import java.util.HashSet;
import java.util.LinkedList;
import java.util.List;
import java.util.Set;

import org.eclipse.core.runtime.IAdaptable;
import org.eclipse.ui.views.properties.IPropertyDescriptor;
import org.eclipse.ui.views.properties.IPropertySource;
import org.eclipse.ui.views.properties.TextPropertyDescriptor;

import org.eclipse.cdt.core.dom.ast.ASTNodeProperty;
import org.eclipse.cdt.core.dom.ast.ASTTypeUtil;
import org.eclipse.cdt.core.dom.ast.DOMException;
import org.eclipse.cdt.core.dom.ast.IASTArrayModifier;
import org.eclipse.cdt.core.dom.ast.IASTBinaryExpression;
import org.eclipse.cdt.core.dom.ast.IASTCastExpression;
import org.eclipse.cdt.core.dom.ast.IASTCompositeTypeSpecifier;
import org.eclipse.cdt.core.dom.ast.IASTDeclSpecifier;
import org.eclipse.cdt.core.dom.ast.IASTDeclarator;
import org.eclipse.cdt.core.dom.ast.IASTEnumerationSpecifier;
import org.eclipse.cdt.core.dom.ast.IASTExpression;
import org.eclipse.cdt.core.dom.ast.IASTFileLocation;
import org.eclipse.cdt.core.dom.ast.IASTFunctionDefinition;
import org.eclipse.cdt.core.dom.ast.IASTIdExpression;
import org.eclipse.cdt.core.dom.ast.IASTLiteralExpression;
import org.eclipse.cdt.core.dom.ast.IASTName;
import org.eclipse.cdt.core.dom.ast.IASTNode;
import org.eclipse.cdt.core.dom.ast.IASTPointer;
import org.eclipse.cdt.core.dom.ast.IASTPreprocessorIncludeStatement;
import org.eclipse.cdt.core.dom.ast.IASTPreprocessorObjectStyleMacroDefinition;
import org.eclipse.cdt.core.dom.ast.IASTProblem;
import org.eclipse.cdt.core.dom.ast.IASTProblemHolder;
import org.eclipse.cdt.core.dom.ast.IASTSimpleDeclaration;
import org.eclipse.cdt.core.dom.ast.IASTTranslationUnit;
import org.eclipse.cdt.core.dom.ast.IASTUnaryExpression;
import org.eclipse.cdt.core.dom.ast.IBinding;
import org.eclipse.cdt.core.dom.ast.IType;
import org.eclipse.cdt.core.dom.ast.c.ICASTArrayDesignator;
import org.eclipse.cdt.core.dom.ast.c.ICASTArrayModifier;
import org.eclipse.cdt.core.dom.ast.c.ICASTDesignator;
import org.eclipse.cdt.core.dom.ast.c.ICASTFieldDesignator;
import org.eclipse.cdt.core.dom.ast.gnu.c.IGCCASTArrayRangeDesignator;
import org.eclipse.cdt.core.parser.Keywords;
import org.eclipse.cdt.core.parser.util.ArrayUtil;

import org.eclipse.cdt.internal.core.dom.parser.ASTNode;
import org.eclipse.cdt.internal.core.model.ASTStringUtil;

/**
 * @author dsteffle
 */
public class DOMASTNodeLeaf implements IAdaptable {
	private static final String INTERNAL = "internal"; //$NON-NLS-1$
    private static final String VARIABLE_SIZED_ = "* "; //$NON-NLS-1$
	private static final String VOLATILE_ = "volatile "; //$NON-NLS-1$
	private static final String STATIC_ = "static "; //$NON-NLS-1$
	private static final String RESTRICT_ = "restrict "; //$NON-NLS-1$
	private static final String CONST_ = "const "; //$NON-NLS-1$
	private static final String DASH = "-"; //$NON-NLS-1$
	private static final String FILE_SEPARATOR = "\\"; //$NON-NLS-1$
	public static final String BLANK_STRING = ""; //$NON-NLS-1$
	private static final String IGCCAST_PREFIX = "IGCCAST"; //$NON-NLS-1$
	private static final String IGNUAST_PREFIX = "IGNUAST"; //$NON-NLS-1$
	private static final String IGPPAST_PREFIX = "IGPPAST"; //$NON-NLS-1$
	private static final String ICPPAST_PREFIX = "ICPPAST"; //$NON-NLS-1$
	private static final String ICAST_PREFIX = "ICAST"; //$NON-NLS-1$
	private static final String IAST_PREFIX = "IAST"; //$NON-NLS-1$
	private static final String START_OF_LIST = ": "; //$NON-NLS-1$
	private static final String LIST_SEPARATOR = ", "; //$NON-NLS-1$
	private static final String PERIOD = "."; //$NON-NLS-1$
	private IASTNode node = null;
	private DOMASTNodeParent parent;
	
	// used for applying filters to the tree, since it is lazily populated
	// all parents of the desired tree object to display need to have a flag as well
	private int filterFlag = 0;
	private static Set<String> ignoreInterfaces= new HashSet<String>(); 
	public static final int FLAG_PROBLEM = 1<<0;
	public static final int FLAG_PREPROCESSOR = 1<<1;
	public static final int FLAG_INCLUDE_STATEMENTS = 1<<2;
	static {
		ignoreInterfaces.addAll(Arrays.asList(new String[] {
				"IASTCompletionContext", "ICPPASTCompletionContext", "IASTNode"
				}));
	}
	public DOMASTNodeLeaf(IASTNode node) {
		this.node = node;
	}
	public IASTNode getNode() {
		return node;
	}
	public void setParent(DOMASTNodeParent parent) {
		this.parent = parent;
	}
	public DOMASTNodeParent getParent() {
		return parent;
	}
	
	private boolean hasProperPrefix(String string) {
		if (string.startsWith(IAST_PREFIX) ||
				string.startsWith(ICAST_PREFIX) ||
				string.startsWith(ICPPAST_PREFIX) ||
				string.startsWith(IGPPAST_PREFIX) ||
				string.startsWith(IGNUAST_PREFIX) ||
				string.startsWith(IGCCAST_PREFIX)) {
			if (!ignoreInterfaces.contains(string)) {
				return true;
			}
		}
		return false;
	}
	
	@Override
	public String toString() {
	    if( node == null ) return BLANK_STRING; 
		StringBuilder buffer = new StringBuilder();
		List<Class<?>> search= new LinkedList<Class<?>>();
		boolean done= false;
		boolean needComma= false;
		
		for (search.add(node.getClass()); !search.isEmpty(); ) {
			Class<?> clazz= search.remove(0);
			if (clazz.isInterface()) {
				if (clazz.getPackage().toString().indexOf(INTERNAL) < 0) {
					String interfaceName= clazz.getName();
					interfaceName= interfaceName.substring(interfaceName.lastIndexOf(PERIOD) + 1);
					if (hasProperPrefix(interfaceName)) {
						if (needComma)
							buffer.append(LIST_SEPARATOR);
						buffer.append(interfaceName);
						needComma= true;
						done= true;
					}
				}				
			} 
			if (!done) {
				search.addAll(Arrays.asList(clazz.getInterfaces()));
				final Class<?> superclass = clazz.getSuperclass();
				if (superclass != null)
					search.add(superclass);
			}
		}
		
		if ( node instanceof IASTProblemHolder ) {
			buffer.append(START_OF_LIST);
			buffer.append(((IASTProblemHolder)node).getProblem().getMessageWithLocation());
		} else if ( node instanceof IASTSimpleDeclaration ) {
			String name = null;
			IASTDeclarator[] decltors = ((IASTSimpleDeclaration)node).getDeclarators();
			
			if ( decltors.length > 0 ) {
				buffer.append(START_OF_LIST);
				for (int i=0; i<decltors.length; i++) {
					name = getDeclaratorName(decltors[i]);
					buffer.append(name);
					
					if (i+1<decltors.length)
						buffer.append(LIST_SEPARATOR);
				}
			}
			return buffer.toString();
		} else if ( node instanceof IASTFunctionDefinition ) {
			String name = getDeclaratorName( ((IASTFunctionDefinition)node).getDeclarator() );
			if (name != null) {
				buffer.append(START_OF_LIST);
				buffer.append(name);
			}
			return buffer.toString();
		} else if ( node instanceof IASTName ) {
			buffer.append(START_OF_LIST);
			buffer.append(node);
			return buffer.toString();
		} else if ( node instanceof IASTTranslationUnit ) {
			String fileName = ((IASTTranslationUnit)node).getFilePath();
			int lastSlash = fileName.lastIndexOf(FILE_SEPARATOR);
			
			if (lastSlash > 0) {
				buffer.append(START_OF_LIST);
				buffer.append(fileName.substring(lastSlash+1)); // TODO make path relative to project, i.e. /projectName/path/file.c
			}
			
			return buffer.toString();
		} else if( node instanceof IASTDeclSpecifier )
		{
		    buffer.append( START_OF_LIST );
		    buffer.append( getSignature((IASTDeclSpecifier)node) );
		    return buffer.toString();
		} else if ( node instanceof IASTPreprocessorIncludeStatement ) {
			String path = ((IASTPreprocessorIncludeStatement)node).getPath();
			int lastSlash = path.lastIndexOf(FILE_SEPARATOR) + 1;
			buffer.append( START_OF_LIST );
			buffer.append( path.substring(lastSlash) );
		} else if ( node instanceof IASTPreprocessorObjectStyleMacroDefinition ) {
			String name = ((IASTPreprocessorObjectStyleMacroDefinition)node).getName().toString();
			if (name != null) {
				buffer.append( START_OF_LIST );
				buffer.append( name );
			}
		} else if ( node instanceof IASTLiteralExpression ) {
			buffer.append(START_OF_LIST);
			buffer.append(node.toString());
		} else if ( node instanceof IASTCastExpression ) {
			buffer.append(START_OF_LIST);
			buffer.append( ASTStringUtil.getCastOperatorString( (IASTCastExpression)node ) );
		} else if ( node instanceof IASTUnaryExpression ) {
			buffer.append(START_OF_LIST);
			buffer.append( ASTStringUtil.getUnaryOperatorString( (IASTUnaryExpression)node ) );
		} else if ( node instanceof IASTBinaryExpression ) {
			buffer.append(START_OF_LIST);
			buffer.append( ASTStringUtil.getBinaryOperatorString( (IASTBinaryExpression)node ) );
		} else if ( node instanceof ICASTDesignator ) {
			if ( node instanceof ICASTArrayDesignator && ((ICASTArrayDesignator)node).getSubscriptExpression() != null ) {
				buffer.append(START_OF_LIST);
				buffer.append(((ICASTArrayDesignator)node).getSubscriptExpression());
			} else if ( node instanceof ICASTFieldDesignator && ((ICASTFieldDesignator)node).getName() != null ) {
				buffer.append(START_OF_LIST);
				buffer.append(((ICASTFieldDesignator)node).getName());
			} else if ( node instanceof IGCCASTArrayRangeDesignator && ((IGCCASTArrayRangeDesignator)node).getRangeCeiling() != null && ((IGCCASTArrayRangeDesignator)node).getRangeFloor() != null ) {
				buffer.append(START_OF_LIST);
				buffer.append(((IGCCASTArrayRangeDesignator)node).getRangeCeiling());
				buffer.append(DASH);
				buffer.append(((IGCCASTArrayRangeDesignator)node).getRangeFloor());
			}
		} else if ( node instanceof IASTArrayModifier ) {
			boolean started = false;
			if ( node instanceof ICASTArrayModifier ) {
				started = true;
				buffer.append(START_OF_LIST);
				if (((ICASTArrayModifier)node).isConst()) buffer.append(CONST_);
				if (((ICASTArrayModifier)node).isRestrict()) buffer.append(RESTRICT_);
				if (((ICASTArrayModifier)node).isStatic()) buffer.append(STATIC_);
				if (((ICASTArrayModifier)node).isVolatile()) buffer.append(VOLATILE_);
				if (((ICASTArrayModifier)node).isVariableSized()) buffer.append(VARIABLE_SIZED_);
			}			

			IASTExpression constantExpression = ((IASTArrayModifier)node).getConstantExpression();
			if ( constantExpression != null && constantExpression instanceof IASTIdExpression ) { 
				if (!started) buffer.append(START_OF_LIST);
				buffer.append(((IASTIdExpression)constantExpression).getName().toString());
			}
		} else if ( node instanceof IASTPointer ) {
			boolean started = false;
			
			if (((IASTPointer)node).isConst()) {
				if (!started) {
					started = true;
					buffer.append(START_OF_LIST);
				}
				buffer.append(CONST_);
			}
			
			if (((IASTPointer)node).isVolatile()) {
				if (!started) {
					started = true;
					buffer.append(START_OF_LIST);
				}
				buffer.append(VOLATILE_);
			}
			
			if (((IASTPointer)node).isRestrict()) {
				if (!started) {
					started = true;
					buffer.append(START_OF_LIST);
				}
				buffer.append(RESTRICT_);
			}

		}
		
		return buffer.toString();
	}
	private String getSignature(IASTDeclSpecifier declSpec) {
		if (declSpec instanceof IASTCompositeTypeSpecifier) {
			StringBuilder buf= new StringBuilder();
			IASTCompositeTypeSpecifier comp = (IASTCompositeTypeSpecifier) declSpec;
			switch(comp.getKey()) {
			case IASTCompositeTypeSpecifier.k_struct:
				buf.append(Keywords.cSTRUCT);
				break;
			case IASTCompositeTypeSpecifier.k_union:
				buf.append(Keywords.cUNION);
				break;
			default:
				buf.append(Keywords.cCLASS);
				break;
			}
			buf.append(' ');
			buf.append(comp.getName().toString());
			return buf.toString();
		} else if (declSpec instanceof IASTEnumerationSpecifier) {
			StringBuilder buf= new StringBuilder();
			IASTEnumerationSpecifier comp = (IASTEnumerationSpecifier) declSpec;
			buf.append(Keywords.cENUM);
			buf.append(' ');
			buf.append(comp.getName().toString());
			return buf.toString();
		}
		String intermed= declSpec.getRawSignature();
		return intermed.replaceAll("\\s+", " ");
	}
	
	private String getDeclaratorName(IASTDeclarator decltor) {
		String name = BLANK_STRING;
		while (decltor != null && decltor.getName() != null && decltor.getName().toString() == null) {
			decltor = decltor.getNestedDeclarator();
		}
		if (decltor != null && decltor.getName() != null) {
			name = decltor.getName().toString();
		}
		return name;
	}
	
	@Override
	public Object getAdapter(@SuppressWarnings("rawtypes") Class key) {
		if (key == IPropertySource.class)
			return new ASTPropertySource(getNode());
		
		return null;
	}
	
	public String getFilename()
	{
		if ( node == null ) return BLANK_STRING;
       IASTFileLocation f = node.getFileLocation();
       if( f == null )
           return BLANK_STRING; 
       return f.getFileName();
	}
	
	public int getOffset() {
       IASTFileLocation f = node.getFileLocation();
       if( f == null )
           return 0; 
       return f.getNodeOffset();
	}
	
	public int getLength() {
       IASTFileLocation f = node.getFileLocation();
       if( f == null )
           return 0; 
       return f.getNodeLength();
	}
	
	public void setFiltersFlag(int flag) {
		filterFlag |= flag;
		
		if (parent != null ) {
			parent.setFiltersFlag(flag);
		}
	}
	
	public int getFiltersFlag() {
		return filterFlag;
	}
	
	public int relativeNodePosition( IASTNode n ){
	    ASTNode astNode = (ASTNode) n;
	    ASTNode thisNode = (ASTNode) getNode();
	    if( thisNode.getOffset() > astNode.getOffset() )
            return -1;
        if( (thisNode.getOffset() + thisNode.getLength()) < (astNode.getOffset() + astNode.getLength()) )
            return 1;
	    return 0;
	}
	
	private static class ASTPropertySource implements IPropertySource {
		private static final String DOMEXCEPTION_THIS_METHOD_ISN_T_SUPPORTED_BY_THIS_OBJECT = "DOMException - this method isn't supported by this Object"; //$NON-NLS-1$
        private static final String FLUSH_CACHE_METHOD_NAME = "flushCache"; //$NON-NLS-1$
        private static final IPropertyDescriptor[] BLANK_DESCRIPTORS = new IPropertyDescriptor[0];
		private static final String OPEN_PAREN = " ("; //$NON-NLS-1$
		private static final String CLOSE_PAREN = ")"; //$NON-NLS-1$
		private static final String L_BRACKET_STRING = "["; //$NON-NLS-1$
		private static final String R_BRACKET_STRING = "]"; //$NON-NLS-1$
		private static final String CLONE_METHOD_NAME = "clone"; //$NON-NLS-1$
		private static final String NO_ELEMENT_STRING = "[0]"; //$NON-NLS-1$
		private static final String SEMI = ";"; //$NON-NLS-1$
		private static final String GETTYPE_METHOD_NAME = "getType"; //$NON-NLS-1$
		private static final String EXCEPTION_ON = " on "; //$NON-NLS-1$
		private static final String NULL_STRING = "null"; //$NON-NLS-1$
		private static final String OBJECT_SEPARATOR = ", "; //$NON-NLS-1$
		private static final String COLON_SEPARATOR = ": "; //$NON-NLS-1$
		private static final String IBINDING_TAG = "IBinding: "; //$NON-NLS-1$
		private static final String EMPTY_PARAMETER = "()"; //$NON-NLS-1$
		private static final String NODE_PREFIX = "Node: "; //$NON-NLS-1$
		private static final String BINDING_PREFIX = "Binding: "; //$NON-NLS-1$
		private static final int DEFAULT_DESCRIPTOR_SIZE = 4;
		IASTNode node = null;
		
		public ASTPropertySource(IASTNode node) {
			this.node = node;
		}
		
		@Override
		public Object getEditableValue() {
			return null;
		}
		@Override
		public IPropertyDescriptor[] getPropertyDescriptors() {
            if (node instanceof IASTTranslationUnit) // skip the properties for the TU (too expensive)
                return BLANK_DESCRIPTORS;
            
			IPropertyDescriptor[] descriptors = new IPropertyDescriptor[DEFAULT_DESCRIPTOR_SIZE];
			
			if (node instanceof IASTName) {
				IPropertyDescriptor[] desc = getPropertyDescriptors(((IASTName)node).resolveBinding());
				if (desc != null)
					for (IPropertyDescriptor element : desc)
						descriptors = ArrayUtil.append(IPropertyDescriptor.class, descriptors, element);
				desc = getPropertyDescriptors(node);
				if (desc != null)
					for (IPropertyDescriptor element : desc)
						descriptors = ArrayUtil.append(IPropertyDescriptor.class, descriptors, element);
				
			} else {
				IPropertyDescriptor[] desc = getPropertyDescriptors(node);
				if (desc != null)
					for (IPropertyDescriptor element : desc)
						descriptors = ArrayUtil.append(IPropertyDescriptor.class, descriptors, element);
			}
			
			return ArrayUtil.trim(IPropertyDescriptor.class, descriptors);
		}
		
		private IPropertyDescriptor[] getPropertyDescriptors(Object obj) {
			IPropertyDescriptor[] desc = new IPropertyDescriptor[DEFAULT_DESCRIPTOR_SIZE];
			if (obj==null) return BLANK_DESCRIPTORS;
			Class<?> objClass = obj.getClass();
			Class<?>[] interfaces = objClass.getInterfaces();
			
			for (Class<?> interface1 : interfaces) {
				Method[] methods = interface1.getMethods();
				for(int j=0; j<methods.length; j++) {
					// multiple interfaces can have the same method, so don't duplicate that method in the property view
					// which causes an ArrayIndexOutOfBoundsException elsewhere
					if (alreadyEncountered(methods[j], desc))
						continue;
					
					if (methods[j].getParameterTypes().length > 0 || (!shouldInvokeMethod(methods[j].getName()))) continue; // only do getters, that aren't in the bad list (like clone())
					
					TextPropertyDescriptor text = null;
					if (obj instanceof IBinding)
						text = new TextPropertyDescriptor(BINDING_PREFIX + methods[j].getName(), methods[j].getName() + EMPTY_PARAMETER);
					else
						text = new TextPropertyDescriptor(NODE_PREFIX + methods[j].getName(), methods[j].getName() + EMPTY_PARAMETER);
					
					if (text != null) {
						if (obj instanceof IBinding)
							text.setCategory(IBINDING_TAG + ((IASTName)node).resolveBinding().getClass().getName().substring(((IASTName)node).resolveBinding().getClass().getName().lastIndexOf(PERIOD) + 1) + COLON_SEPARATOR + getValueString(((IASTName)node).resolveBinding()));
						else
							text.setCategory(objClass.getName().substring(objClass.getName().lastIndexOf(PERIOD) + 1) + COLON_SEPARATOR + getValueString(node));
						desc = ArrayUtil.append(IPropertyDescriptor.class, desc, text);
					}
				}
			}
			
			return ArrayUtil.trim(IPropertyDescriptor.class, desc);
		}
		
		private boolean alreadyEncountered(Method method, IPropertyDescriptor[] desc) {
			StringBuilder name = null;
			for (IPropertyDescriptor element : desc) {
				if (element == null) // reached the end of the array
					break;
				
				name = new StringBuilder();
				name.append(method.getName());
				name.append(EMPTY_PARAMETER);
				if (name.toString().equals(element.getDisplayName()))
					return true;
			}
			
			return false;
		}
		
		@Override
		public Object getPropertyValue(Object id) {
			if (!(id instanceof String))
				return BLANK_STRING;
			
			Class<?> nodeClass = node.getClass();
			
			String value = BLANK_STRING;
			
			try {
				Object result = null;
				if (node instanceof IASTName && ((String)id).startsWith(BINDING_PREFIX)) {
					String methodName = id.toString();
					methodName = methodName.replaceAll(BINDING_PREFIX, BLANK_STRING);
					Method method = ((IASTName)node).resolveBinding().getClass().getMethod(methodName, new Class[0]); // only going to be getter methods...
					result = method.invoke(((IASTName)node).resolveBinding());
				} else {
					String methodName = id.toString();
					methodName = methodName.replaceAll(NODE_PREFIX, BLANK_STRING);
					Method method = nodeClass.getMethod(methodName, new Class[0]); // only going to be getter methods...
					method.setAccessible(true);
					result = method.invoke(node);
				}
				
				if (result == null) {
					value = NULL_STRING;
				} else if (result.getClass().isArray()) { // if it's an array
					if (result.getClass().getComponentType().equals(char.class)) // array of char
						value = String.valueOf((char[])result);
					else if (result.getClass().isPrimitive()) {
						value = trimObjectToString(result.toString());
					} else
						value = getValueString((Object[])result);
				} else {
					value = getValueString(result);
				}
			} catch (Exception e) {
                if (e instanceof InvocationTargetException) {
                    if (((InvocationTargetException)e).getTargetException() instanceof DOMException)
                        return DOMEXCEPTION_THIS_METHOD_ISN_T_SUPPORTED_BY_THIS_OBJECT;
                
                    e.printStackTrace(); // display all exceptions to developers
                    return trimObjectToString(((InvocationTargetException)e).getTargetException().toString()) + EXCEPTION_ON + ((InvocationTargetException)e).getTargetException().getStackTrace()[0].toString();
                }
                
                return e.toString();
			}
			
			return value;
		}
		
		private String trimObjectToString(String str) {
			return str.substring(str.lastIndexOf(PERIOD) + 1);
		}
		
		private String getValueString(Object obj) {
			if (obj == null) return NULL_STRING;
			
			StringBuilder buffer = new StringBuilder();
			
			if (obj.getClass().isPrimitive()) {
				buffer.append(trimObjectToString(obj.toString()));
			} else if (obj instanceof ASTNodeProperty) {
				buffer.append(((ASTNodeProperty)obj).getName());
			} else if (obj instanceof IASTProblemHolder) {
				IASTProblemHolder ph= (IASTProblemHolder) obj;
				IASTProblem problem= ph.getProblem();
				buffer.append(problem.getMessage());
			} else if (obj instanceof IASTName) {
				final String toString = ((IASTName)obj).toString();
                if( toString != null )
                {
                    buffer.append( trimObjectToString(toString) );
                    buffer.append(COLON_SEPARATOR);
                    buffer.append( getType(((IASTName)obj).resolveBinding()) );
                }
			} else if (obj instanceof IType) {
				buffer.append(getType(obj));
			} else if (obj instanceof IBinding) {
				buffer.append(((IBinding)obj).getName());
				buffer.append(COLON_SEPARATOR);
				buffer.append(getType(obj));
			} else if (obj instanceof IASTExpression) {
				buffer.append(ASTStringUtil.getExpressionString((IASTExpression)obj));
			} else if (obj instanceof IASTNode) {
				String utilString = DOMAST.getNodeSignature((IASTNode)obj);
				if (utilString != null && !utilString.equals(BLANK_STRING)) {
					buffer.append(trimObjectToString(obj.toString()));
					buffer.append(COLON_SEPARATOR);
					buffer.append(utilString);
				}
				else
					buffer.append(trimObjectToString(obj.toString()));
			} else
				buffer.append(obj.toString());
			
			if( obj instanceof IBinding ){
				buffer.append( OPEN_PAREN );
				buffer.append( Integer.toHexString(obj.hashCode()) );
				buffer.append( CLOSE_PAREN );
			}
			
			return buffer.toString();
		}
		
		private String getType(Object obj) {
			if (obj == null) return NULL_STRING;
			
			if (obj instanceof IType)
				return ASTTypeUtil.getType((IType)obj);
			
			Method[] methods = obj.getClass().getMethods();
			boolean hasGetType = false;
			
			int i=0;
			for(; i<methods.length; i++) {
				if (methods[i].getName().equals(GETTYPE_METHOD_NAME)) {
					hasGetType = true;
					break;
				}
			}
			
			if (hasGetType) {
				try {
					Object result = methods[i].invoke(obj);
					
					if (result instanceof IType) {
						return ASTTypeUtil.getType((IType)result);
					}
				} catch (Exception e) {
					if (e instanceof InvocationTargetException) {
                        if (((InvocationTargetException)e).getTargetException() instanceof DOMException)
                            return DOMEXCEPTION_THIS_METHOD_ISN_T_SUPPORTED_BY_THIS_OBJECT;
                    
                        e.printStackTrace(); // display all exceptions to developers
						return trimObjectToString(((InvocationTargetException)e).getTargetException().toString()) + EXCEPTION_ON + ((InvocationTargetException)e).getTargetException().getStackTrace()[0].toString();
                    }
					
					return e.toString();
				}
			}
			
			return BLANK_STRING; // if there is no type
		}
		
		private String getValueString(Object[] objs) {
			if (objs.length==0) return trimObjectToString(objs.getClass().getName()).replaceAll(SEMI, BLANK_STRING) + NO_ELEMENT_STRING;
			
			StringBuilder buffer = new StringBuilder();
			buffer.append(L_BRACKET_STRING);
			for(int i=0; i<objs.length; i++) {
				buffer.append(getValueString(objs[i]));
				if (i<objs.length-1) buffer.append(OBJECT_SEPARATOR); 
			}
			buffer.append(R_BRACKET_STRING);
			
			return buffer.toString();
		}
		
		// used to determine if a getter method should be invoked or not, there may be a list of them in the future...
		private boolean shouldInvokeMethod(String method) {
			if (method.equals(CLONE_METHOD_NAME)) 
				return false;
            if (method.equals(FLUSH_CACHE_METHOD_NAME)) 
                return false;
            if (method.startsWith("set"))
            	return false;
			
			return true;
		}
		
		@Override
		public boolean isPropertySet(Object id) {
			return false;
		}
		@Override
		public void resetPropertyValue(Object id) {
		}
		@Override
		public void setPropertyValue(Object id, Object value) {
		}
	}

}