/*******************************************************************************
 * Copyright (c) 2000, 2007 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
 *
 
 *******************************************************************************/
package org.eclipse.dltk.core.search;

import org.eclipse.dltk.core.*;

/**
 * A match collected while searching for {@link SearchEngine} all type names
 * methods using a {@link TypeNameRequestor requestor}.
 * <p>
 * User can get type from this match using {@link #getType()} method.
 * </p>
 * <p>
 * This class is intented to be overridden by clients.
 * </p>
 * 
 * @see MethodNameMatchRequestor
 * @see SearchEngine#searchAllTypeNames(char[], int, char[], int, int,
 *      IScriptSearchScope, MethodNameMatchRequestor, int,
 *      org.eclipse.core.runtime.IProgressMonitor)
 * @see SearchEngine#searchAllTypeNames(char[][], char[][], IScriptSearchScope,
 *      MethodNameMatchRequestor, int,
 *      org.eclipse.core.runtime.IProgressMonitor)
 */
public abstract class MethodNameMatch {

	/**
	 * Returns the matched type fully qualified name using '.' character as
	 * separator (e.g. package name + '.' enclosing type names + '.' simple
	 * name).
	 * 
	 * @see #getType()
	 * @see IType#getFullyQualifiedName(char)
	 * 
	 * @throws NullPointerException
	 *             if matched type is <code> null</code>
	 * @return Fully qualified type name of the type
	 */
	public String getFullyQualifiedName() {
		return getMethod().getFullyQualifiedName();
	}

	/**
	 * Returns the modifiers of the matched type.
	 * <p>
	 * This is a handle-only method as neither Script Model nor classpath
	 * initialization is done while calling this method.
	 * 
	 * @return the type modifiers
	 */
	public abstract int getModifiers();

	/**
	 * Returns the project fragment of the stored type. Project fragment cannot
	 * be null and <strong>does</strong> exist.
	 * 
	 * @see #getType()
	 * @see IScriptElement#getAncestor(int)
	 * 
	 * @throws NullPointerException
	 *             if matched type is <code> null</code>
	 * @return the existing Script model package fragment root (ie. cannot be
	 *         <code>null</code> and will return <code>true</code> to
	 *         <code>exists()</code> message).
	 */
	public IProjectFragment getProjectFragment() {
		return (IProjectFragment) getMethod().getAncestor(
				IModelElement.PROJECT_FRAGMENT);
	}

	/**
	 * Returns the package name of the stored type.
	 * 
	 * @see #getType()
	 * @see IType#getPackageFragment()
	 * 
	 * @throws NullPointerException
	 *             if matched type is <code> null</code>
	 * @return the package name
	 */
	public String getPackageName() {
		final IModelElement parent = getMethod().getParent();
		if (parent.getElementType() == IModelElement.SOURCE_MODULE) {
			ISourceModule source = (ISourceModule) parent;
			// TODO resolve package name
			return source.getElementName();
		}
		return null;
	}

	/**
	 * Returns the name of the stored type.
	 * 
	 * @see #getType()
	 * @see IScriptElement#getElementName()
	 * 
	 * @throws NullPointerException
	 *             if matched type is <code> null</code>
	 * @return the type name
	 */
	public String getSimpleMethodName() {
		return getMethod().getElementName();
	}

	/**
	 * Returns a Script model method handle. This handle may exist or not, but
	 * is not supposed to be <code>null</code>.
	 * <p>
	 * This is a handle-only method as neither Script Model nor classpath
	 * initializations are done while calling this method.
	 * 
	 * @see IMethod
	 * @return the non-null handle on matched script model type.
	 */
	public abstract IMethod getMethod();

	/**
	 * Name of the type container using '.' character as separator (e.g. package
	 * name + '.' + enclosing type names).
	 * 
	 * @see #getType()
	 * @see IMember#getDeclaringType()
	 * 
	 * @throws NullPointerException
	 *             if matched type is <code> null</code>
	 * @return Name of the type container
	 */
	public String getMethodContainerName() {
		IType outerType = getMethod().getDeclaringType();
		if (outerType != null) {
			return outerType.getTypeQualifiedName();
		} else {
			return getMethod().getSourceModule().getParent().getElementName();
		}
	}

	/**
	 * Returns the matched type qualified name using '.' character as separator
	 * (e.g. enclosing type names + '.' + simple name).
	 * 
	 * @see #getType()
	 * @see IType#getTypeQualifiedName(char)
	 * 
	 * @throws NullPointerException
	 *             if matched type is <code> null</code>
	 * @return Fully qualified type name of the type
	 */
	public String getTypeQualifiedName() {
		return getMethod().getFullyQualifiedName();
	}
}