/*******************************************************************************
* Copyright (c) 2000, 2006 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.pde.internal.core.ischema;
/**
* Objects that implement this interface hold data about attributes of schema
* elements.
*/
public interface ISchemaAttribute extends ISchemaObject, IMetaAttribute {
/**
* This attribute can be omitted by the extension element.
*/
public static final int OPTIONAL = 0;
/**
* This attribute must be defined in the extension element.
*/
public static final int REQUIRED = 1;
/**
* This attribute can be omitted by the extension element, and if it is, its
* value will be set to the value defined in the "value" field.
*/
public static final int DEFAULT = 2;
/**
* Table of the 'use' clause choices.
*/
public static final String[] USE_TABLE = {
"optional", "required", "default" }; //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
public static final int BOOL_IND = 0;
public static final int STR_IND = 1;
public static final int JAVA_IND = 2;
public static final int RES_IND = 3;
public static final String[] TYPES = {
"boolean", //$NON-NLS-1$
"string", //$NON-NLS-1$
"java", //$NON-NLS-1$
"resource" //$NON-NLS-1$
};
/**
* Returns the type of this attribute. Attributes can only have simple
* types.
*/
public ISchemaSimpleType getType();
/**
* Returns the 'use' mode of this attribute (OPTIONAL, REQUIRED or DEFAULT).
*/
public int getUse();
/**
* Returns the default value of this attribute when 'use' clause is DEFAULT.
*/
public Object getValue();
}
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