/*******************************************************************************
 * Copyright (c) 2000, 2011 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.che.ide.ext.java.jdt.internal.corext.refactoring.types;

import org.eclipse.che.ide.ext.java.jdt.core.dom.ITypeBinding;
import org.eclipse.che.ide.runtime.Assert;


public final class GenericType extends HierarchyType {

    private TypeVariable[] fTypeParameters;

    protected GenericType(TypeEnvironment environment) {
        super(environment);
    }

    @Override
    protected void initialize(ITypeBinding binding) {
        Assert.isTrue(binding.isGenericType());
        super.initialize(binding);
        TypeEnvironment environment = getEnvironment();
        ITypeBinding[] typeParameters = binding.getTypeParameters();
        fTypeParameters = new TypeVariable[typeParameters.length];
        for (int i = 0; i < typeParameters.length; i++) {
            fTypeParameters[i] = (TypeVariable)environment.create(typeParameters[i]);
        }
    }

    @Override
    public int getKind() {
        return GENERIC_TYPE;
    }

    public TypeVariable[] getTypeParameters() {
        return fTypeParameters;
    }

    @Override
    public boolean doEquals(TType type) {
        return getJavaTypeBinding().isEqualTo(((GenericType)type).getJavaTypeBinding());
    }

    @Override
    public int hashCode() {
        return getJavaTypeBinding().hashCode();
    }

    @Override
    protected boolean doCanAssignTo(TType type) {
        return false;
    }

    @Override
    protected boolean isTypeEquivalentTo(TType other) {
        int otherElementType = other.getKind();
        if (otherElementType == RAW_TYPE || otherElementType == PARAMETERIZED_TYPE)
            return getErasure().isTypeEquivalentTo(other.getErasure());
        return super.isTypeEquivalentTo(other);
    }

    @Override
    public String getName() {
        return getJavaTypeBinding().getName();
    }

    @Override
    protected String getPlainPrettySignature() {
        StringBuffer result = new StringBuffer(getJavaTypeBinding().getQualifiedName());
        result.append("<"); //$NON-NLS-1$
        result.append(fTypeParameters[0].getPrettySignature());
        for (int i = 1; i < fTypeParameters.length; i++) {
            result.append(", "); //$NON-NLS-1$
            result.append(fTypeParameters[i].getPrettySignature());
        }
        result.append(">"); //$NON-NLS-1$
        return result.toString();
    }
}