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/*******************************************************************************
* Copyright (c) 2000, 2015 IBM Corporation and others.
*
* This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* IBM Corporation - initial API and implementation
* Alexander Kurtakov - Bug 460858
*******************************************************************************/
package org.eclipse.help.internal.workingset;
import org.eclipse.core.runtime.*;
import org.eclipse.help.*;
import org.w3c.dom.*;
/**
* Makes help resources adaptable and persistable
*/
public abstract class AdaptableHelpResource
implements
IAdaptable,
IHelpResource {
protected IHelpResource element;
protected IAdaptable parent;
/**
* This constructor will be called when wrapping help resources.
*/
public AdaptableHelpResource(IHelpResource element) {
this.element = element;
}
/**
* @see org.eclipse.core.runtime.IAdaptable#getAdapter(java.lang.Class)
*/
@Override
@SuppressWarnings("unchecked")
public <T> T getAdapter(Class<T> adapter) {
if (adapter == IHelpResource.class)
return (T) element;
return null;
}
public abstract void saveState(Element element);
public abstract AdaptableHelpResource[] getChildren();
public IAdaptable getParent() {
return parent;
}
public void setParent(IAdaptable parent) {
this.parent = parent;
}
/**
* Tests the receiver and the object for equality
*
* @param object
* object to compare the receiver to
* @return true=the object equals the receiver, the name is the same. false
* otherwise
*/
@Override
public boolean equals(Object object) {
if (this == object)
return true;
else if (object instanceof AdaptableHelpResource)
return (element == ((AdaptableHelpResource) object).element);
else if (object instanceof IHelpResource)
return element == object;
else
return false;
}
/**
* Returns the hash code.
*
* @return the hash code.
*/
@Override
public int hashCode() {
if (element == null)
return -1;
return element.hashCode();
}
/**
* Returns a descendant topic with a specified href
*/
public abstract ITopic getTopic(String href);
/**
* @see org.eclipse.help.IHelpResource#getHref()
*/
@Override
public String getHref() {
return element.getHref();
}
/**
* @see org.eclipse.help.IHelpResource#getLabel()
*/
@Override
public String getLabel() {
return element.getLabel();
}
}
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