/*******************************************************************************
 * Copyright (c) 2000, 2003 IBM Corporation and others.
 * 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
 * 
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package net.sourceforge.phpdt.internal.core;

import net.sourceforge.phpdt.core.IJavaElement;
import net.sourceforge.phpdt.core.IType;
import net.sourceforge.phpdt.core.JavaModelException;
import net.sourceforge.phpdt.internal.compiler.env.IConstants;
import net.sourceforge.phpdt.internal.compiler.env.ISourceField;
import net.sourceforge.phpdt.internal.compiler.env.ISourceMethod;
import net.sourceforge.phpdt.internal.compiler.env.ISourceType;

/**
 * Element info for an IType element that originated from source.
 */
public class SourceTypeElementInfo extends MemberElementInfo implements
		ISourceType {
	protected static final ISourceField[] NO_FIELDS = new ISourceField[0];

	protected static final ISourceMethod[] NO_METHODS = new ISourceMethod[0];

	protected static final ISourceType[] NO_TYPES = new ISourceType[0];

	/**
	 * The name of the superclass for this type. This name is fully qualified
	 * for binary types and is NOT fully qualified for source types.
	 */
	protected char[] fSuperclassName;

	/**
	 * The names of the interfaces this type implements or extends. These names
	 * are fully qualified in the case of a binary type, and are NOT fully
	 * qualified in the case of a source type
	 */
	protected char[][] fSuperInterfaceNames;

	/**
	 * The enclosing type name for this type.
	 * 
	 * @see getEnclosingTypeName
	 */
	protected char[] fEnclosingTypeName = null;

	/**
	 * The name of the source file this type is declared in.
	 */
	protected char[] fSourceFileName = null;

	/**
	 * The name of the package this type is contained in.
	 */
	protected char[] fPackageName = null;

	/**
	 * The qualified name of this type.
	 */
	protected char[] fQualifiedName = null;

	/**
	 * The imports in this type's compilation unit
	 */
	protected char[][] fImports = null;

	/**
	 * Backpointer to my type handle - useful for translation from info to
	 * handle.
	 */
	protected IType fHandle = null;

	/**
	 * Adds the given import to this type's collection of imports
	 */
	protected void addImport(char[] i) {
		if (fImports == null) {
			fImports = new char[][] { i };
		} else {
			char[][] copy = new char[fImports.length + 1][];
			System.arraycopy(fImports, 0, copy, 0, fImports.length);
			copy[fImports.length] = i;
			fImports = copy;
		}
	}

	/**
	 * Returns the ISourceType that is the enclosing type for this type, or
	 * <code>null</code> if this type is a top level type.
	 */
	public ISourceType getEnclosingType() {
		IJavaElement parent = fHandle.getParent();
		if (parent != null && parent.getElementType() == IJavaElement.TYPE) {
			try {
				return (ISourceType) ((JavaElement) parent).getElementInfo();
			} catch (JavaModelException e) {
				return null;
			}
		} else {
			return null;
		}
	}

	/**
	 * @see ISourceType
	 */
	public char[] getEnclosingTypeName() {
		return fEnclosingTypeName;
	}

	/**
	 * @see ISourceType
	 */
	public ISourceField[] getFields() {
		int length = fChildren.length;
		if (length == 0)
			return NO_FIELDS;
		ISourceField[] fields = new ISourceField[length];
		int fieldIndex = 0;
		for (int i = 0; i < length; i++) {
			IJavaElement child = fChildren[i];
			if (child instanceof SourceField) {
				try {
					ISourceField field = (ISourceField) ((SourceField) child)
							.getElementInfo();
					fields[fieldIndex++] = field;
				} catch (JavaModelException e) {
				}
			}
		}
		if (fieldIndex == 0)
			return NO_FIELDS;
		System.arraycopy(fields, 0, fields = new ISourceField[fieldIndex], 0,
				fieldIndex);
		return fields;
	}

	/**
	 * @see ISourceType
	 */
	public char[] getFileName() {
		return fSourceFileName;
	}

	/**
	 * Returns the handle for this type info
	 */
	public IType getHandle() {
		return fHandle;
	}

	/**
	 * @see ISourceType
	 */
	public char[][] getImports() {
		return fImports;
	}

	/**
	 * @see ISourceType
	 */
	public char[][] getInterfaceNames() {
		return fSuperInterfaceNames;
	}

	/**
	 * @see ISourceType
	 */
	public ISourceType[] getMemberTypes() {
		int length = fChildren.length;
		if (length == 0)
			return NO_TYPES;
		ISourceType[] memberTypes = new ISourceType[length];
		int typeIndex = 0;
		for (int i = 0; i < length; i++) {
			IJavaElement child = fChildren[i];
			if (child instanceof SourceType) {
				try {
					ISourceType type = (ISourceType) ((SourceType) child)
							.getElementInfo();
					memberTypes[typeIndex++] = type;
				} catch (JavaModelException e) {
				}
			}
		}
		if (typeIndex == 0)
			return NO_TYPES;
		System.arraycopy(memberTypes, 0,
				memberTypes = new ISourceType[typeIndex], 0, typeIndex);
		return memberTypes;
	}

	/**
	 * @see ISourceType
	 */
	public ISourceMethod[] getMethods() {
		int length = fChildren.length;
		if (length == 0)
			return NO_METHODS;
		ISourceMethod[] methods = new ISourceMethod[length];
		int methodIndex = 0;
		for (int i = 0; i < length; i++) {
			IJavaElement child = fChildren[i];
			if (child instanceof SourceMethod) {
				try {
					ISourceMethod method = (ISourceMethod) ((SourceMethod) child)
							.getElementInfo();
					methods[methodIndex++] = method;
				} catch (JavaModelException e) {
				}
			}
		}
		if (methodIndex == 0)
			return NO_METHODS;
		System.arraycopy(methods, 0, methods = new ISourceMethod[methodIndex],
				0, methodIndex);
		return methods;
	}

	/**
	 * @see ISourceType
	 */
	public char[] getPackageName() {
		return fPackageName;
	}

	/**
	 * @see ISourceType
	 */
	public char[] getQualifiedName() {
		return fQualifiedName;
	}

	/**
	 * @see ISourceType
	 */
	public char[] getSuperclassName() {
		return fSuperclassName;
	}

	/**
	 * @see ISourceType
	 */
	public boolean isBinaryType() {
		return false;
	}

	/**
	 * @see ISourceType
	 */
	public boolean isClass() {
		return (this.flags & IConstants.AccInterface) == 0;
	}

	/**
	 * @see ISourceType
	 */
	public boolean isInterface() {
		return (this.flags & IConstants.AccInterface) != 0;
	}

	/**
	 * Sets the (unqualified) name of the type that encloses this type.
	 */
	protected void setEnclosingTypeName(char[] enclosingTypeName) {
		fEnclosingTypeName = enclosingTypeName;
	}

	/**
	 * Sets the handle for this type info
	 */
	protected void setHandle(IType handle) {
		fHandle = handle;
	}

	/**
	 * Sets the name of the package this type is declared in.
	 */
	protected void setPackageName(char[] name) {
		fPackageName = name;
	}

	/**
	 * Sets this type's qualified name.
	 */
	protected void setQualifiedName(char[] name) {
		fQualifiedName = name;
	}

	/**
	 * Sets the name of the source file this type is declared in.
	 */
	protected void setSourceFileName(char[] name) {
		fSourceFileName = name;
	}

	/**
	 * Sets the (unqualified) name of this type's superclass
	 */
	protected void setSuperclassName(char[] superclassName) {
		fSuperclassName = superclassName;
	}

	/**
	 * Sets the (unqualified) names of the interfaces this type implements or
	 * extends
	 */
	protected void setSuperInterfaceNames(char[][] superInterfaceNames) {
		fSuperInterfaceNames = superInterfaceNames;
	}

	public String toString() {
		return "Info for " + fHandle.toString(); //$NON-NLS-1$
	}
}