TypeParameter.java

/*******************************************************************************
 * Copyright (c) 2004, 2010 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 Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.jdt.internal.core;

import org.eclipse.jdt.core.IClassFile;
import org.eclipse.jdt.core.IMember;
import org.eclipse.jdt.core.ISourceRange;
import org.eclipse.jdt.core.ITypeParameter;
import org.eclipse.jdt.core.JavaModelException;
import org.eclipse.jdt.core.Signature;
import org.eclipse.jdt.core.SourceRange;
import org.eclipse.jdt.core.compiler.CharOperation;

public class TypeParameter extends SourceRefElement implements ITypeParameter {

	static final ITypeParameter[] NO_TYPE_PARAMETERS= new ITypeParameter[0];

	protected String name;

	public TypeParameter(JavaElement parent, String name) {
		super(parent);
		this.name= name;
	}

	public boolean equals(Object o) {
		if (!(o instanceof TypeParameter))
			return false;
		return super.equals(o);
	}

	public String[] getBounds() throws JavaModelException {
		TypeParameterElementInfo info= (TypeParameterElementInfo)getElementInfo();
		return CharOperation.toStrings(info.bounds);
	}

	public String[] getBoundsSignatures() throws JavaModelException {

		String[] boundSignatures= null;
		TypeParameterElementInfo info= (TypeParameterElementInfo)this.getElementInfo();

		// For a binary type or method, the signature is already available from the .class file.
		// No need to construct again
		if (this.parent instanceof BinaryMember) {
			char[][] boundsSignatures= info.boundsSignatures;
			if (boundsSignatures == null || boundsSignatures.length == 0) {
				return CharOperation.NO_STRINGS;
			}
			return CharOperation.toStrings(info.boundsSignatures);
		}

		char[][] bounds= info.bounds;
		if (bounds == null || bounds.length == 0) {
			return CharOperation.NO_STRINGS;
		}

		int boundsLength= bounds.length;
		boundSignatures= new String[boundsLength];
		for (int i= 0; i < boundsLength; i++) {
			boundSignatures[i]= new String(Signature.createCharArrayTypeSignature(bounds[i], false));
		}
		return boundSignatures;
	}

	public IMember getDeclaringMember() {
		return (IMember)getParent();
	}

	public String getElementName() {
		return this.name;
	}

	public int getElementType() {
		return TYPE_PARAMETER;
	}

	protected char getHandleMementoDelimiter() {
		return JavaElement.JEM_TYPE_PARAMETER;
	}

	public ISourceRange getNameRange() throws JavaModelException {
		SourceMapper mapper= getSourceMapper();
		if (mapper != null) {
			// ensure the class file's buffer is open so that source ranges are computed
			ClassFile classFile= (ClassFile)getClassFile();
			if (classFile != null) {
				classFile.getBuffer();
				return mapper.getNameRange(this);
			}
		}
		TypeParameterElementInfo info= (TypeParameterElementInfo)getElementInfo();
		return new SourceRange(info.nameStart, info.nameEnd - info.nameStart + 1);
	}

	/*
	 * @see ISourceReference
	 */
	public ISourceRange getSourceRange() throws JavaModelException {
		SourceMapper mapper= getSourceMapper();
		if (mapper != null) {
			// ensure the class file's buffer is open so that source ranges are computed
			ClassFile classFile= (ClassFile)getClassFile();
			if (classFile != null) {
				classFile.getBuffer();
				return mapper.getSourceRange(this);
			}
		}
		return super.getSourceRange();
	}

	public IClassFile getClassFile() {
		return ((JavaElement)getParent()).getClassFile();
	}

	protected void toStringName(StringBuffer buffer) {
		buffer.append('<');
		buffer.append(getElementName());
		buffer.append('>');
	}
}