/* *******************************************************************
 * Copyright (c) 2005 Contributors.
 * 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://eclipse.org/legal/epl-v10.html 
 *  
 * Contributors: 
 *   Adrian Colyer			Initial implementation
 * ******************************************************************/
package org.aspectj.weaver;

import java.util.Collections;
import java.util.List;

import org.aspectj.bridge.ISourceLocation;
import org.aspectj.bridge.context.CompilationAndWeavingContext;

When we try to resolve a type in the world that we require to be present, and then fail to find it, we return an instance of this
class. This class defers the production of the "can't find type error" until the first time that someone asks a question that
can't be answered solely from the signature. This enables the weaver to be more tolerant of missing types.
/**
 * When we try to resolve a type in the world that we require to be present, and then fail to find it, we return an instance of this
 * class. This class defers the production of the "can't find type error" until the first time that someone asks a question that
 * can't be answered solely from the signature. This enables the weaver to be more tolerant of missing types.
 * 
 */
public class MissingResolvedTypeWithKnownSignature extends ResolvedType {

	private static ResolvedMember[] NO_MEMBERS = new ResolvedMember[0];
	private static ResolvedType[] NO_TYPES = new ResolvedType[0];
	private boolean issuedCantFindTypeError = false;
	private boolean issuedJoinPointWarning = false;
	private boolean issuedMissingInterfaceWarning = false;

	
Params:
signature – 
world – /**
	 * @param signature
	 * @param world
	 */
	public MissingResolvedTypeWithKnownSignature(String signature, World world) {
		super(signature, world);
	}

	@Override
	public boolean isMissing() {
		return true;
	}

	
Params:
signature – 
signatureErasure – 
world – /**
	 * @param signature
	 * @param signatureErasure
	 * @param world
	 */
	public MissingResolvedTypeWithKnownSignature(String signature, String signatureErasure, World world) {
		super(signature, signatureErasure, world);
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.aspectj.weaver.ResolvedType#getDeclaredFields()
	 */
	@Override
	public ResolvedMember[] getDeclaredFields() {
		raiseCantFindType(WeaverMessages.CANT_FIND_TYPE_FIELDS);
		return NO_MEMBERS;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.aspectj.weaver.ResolvedType#getDeclaredMethods()
	 */
	@Override
	public ResolvedMember[] getDeclaredMethods() {
		raiseCantFindType(WeaverMessages.CANT_FIND_TYPE_METHODS);
		return NO_MEMBERS;
	}

	@Override
	public AnnotationAJ[] getAnnotations() {
		raiseCantFindType(WeaverMessages.CANT_FIND_TYPE_ANNOTATION);
		return AnnotationAJ.EMPTY_ARRAY;
	}

	@Override
	public ResolvedType[] getDeclaredInterfaces() {
		raiseCantFindType(WeaverMessages.CANT_FIND_TYPE_INTERFACES);
		return NO_TYPES;
	}

	@Override
	public ResolvedMember[] getDeclaredPointcuts() {
		raiseCantFindType(WeaverMessages.CANT_FIND_TYPE_POINTCUTS);
		return NO_MEMBERS;
	}

	@Override
	public ResolvedType getSuperclass() {
		raiseCantFindType(WeaverMessages.CANT_FIND_TYPE_SUPERCLASS);
		return ResolvedType.MISSING;
	}

	@Override
	public int getModifiers() {
		raiseCantFindType(WeaverMessages.CANT_FIND_TYPE_MODIFIERS);
		return 0;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.aspectj.weaver.ResolvedType#getSourceContext()
	 */
	@Override
	public ISourceContext getSourceContext() {
		return new ISourceContext() {

			@Override
			public ISourceLocation makeSourceLocation(IHasPosition position) {
				return null;
			}

			@Override
			public ISourceLocation makeSourceLocation(int line, int offset) {
				return null;
			}

			@Override
			public int getOffset() {
				return 0;
			}

			@Override
			public void tidy() {
			}

		};
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.aspectj.weaver.ResolvedType#isAssignableFrom(org.aspectj.weaver.ResolvedType)
	 */
	@Override
	public boolean isAssignableFrom(ResolvedType other) {
		raiseCantFindType(WeaverMessages.CANT_FIND_TYPE_ASSIGNABLE, other.getName());
		return false;
	}

	@Override
	public boolean isAssignableFrom(ResolvedType other, boolean allowMissing) {
		if (allowMissing) {
			return false;
		} else {
			return isAssignableFrom(other);
		}
	}
	
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.aspectj.weaver.ResolvedType#isCoerceableFrom(org.aspectj.weaver.ResolvedType)
	 */
	@Override
	public boolean isCoerceableFrom(ResolvedType other) {
		raiseCantFindType(WeaverMessages.CANT_FIND_TYPE_COERCEABLE, other.getName());
		return false;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.aspectj.weaver.AnnotatedElement#hasAnnotation(org.aspectj.weaver.UnresolvedType)
	 */
	@Override
	public boolean hasAnnotation(UnresolvedType ofType) {
		raiseCantFindType(WeaverMessages.CANT_FIND_TYPE_ANNOTATION);
		return false;
	}

	@Override
	public List getInterTypeMungers() {
		return Collections.EMPTY_LIST;
	}

	@Override
	public List getInterTypeMungersIncludingSupers() {
		return Collections.EMPTY_LIST;
	}

	@Override
	public List getInterTypeParentMungers() {
		return Collections.EMPTY_LIST;
	}

	@Override
	public List getInterTypeParentMungersIncludingSupers() {
		return Collections.EMPTY_LIST;
	}

	@Override
	protected void collectInterTypeMungers(List collector) {
		return;
	}

	public void raiseWarningOnJoinPointSignature(String signature) {
		if (issuedJoinPointWarning) {
			return;
		}
		String message = WeaverMessages.format(WeaverMessages.CANT_FIND_TYPE_JOINPOINT, getName(), signature);
		message += "\n" + CompilationAndWeavingContext.getCurrentContext();
		world.getLint().cantFindTypeAffectingJoinPointMatch.signal(message, null);
		// MessageUtil.warn(world.getMessageHandler(),message);
		issuedJoinPointWarning = true;
	}

	public void raiseWarningOnMissingInterfaceWhilstFindingMethods() {
		if (issuedMissingInterfaceWarning) {
			return;
		}
		String message = WeaverMessages.format(WeaverMessages.CANT_FIND_TYPE_INTERFACE_METHODS, getName(), signature);
		message += "\n" + CompilationAndWeavingContext.getCurrentContext();
		world.getLint().cantFindTypeAffectingJoinPointMatch.signal(message, null);
		// MessageUtil.warn(world.getMessageHandler(),message);
		issuedMissingInterfaceWarning = true;
	}

	private void raiseCantFindType(String key) {
		if (!world.getLint().cantFindType.isEnabled()) {
			return;
		}
		if (issuedCantFindTypeError) {
			return;
		}
		String message = WeaverMessages.format(key, getName());
		message += "\n" + CompilationAndWeavingContext.getCurrentContext();
		world.getLint().cantFindType.signal(message, null);
		// MessageUtil.error(world.getMessageHandler(),message);
		issuedCantFindTypeError = true;
	}

	private void raiseCantFindType(String key, String insert) {
		if (issuedCantFindTypeError) {
			return;
		}
		String message = WeaverMessages.format(key, getName(), insert);
		message += "\n" + CompilationAndWeavingContext.getCurrentContext();
		world.getLint().cantFindType.signal(message, null);
		// MessageUtil.error(world.getMessageHandler(),message);
		issuedCantFindTypeError = true;
	}

}