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/*******************************************************************************
* Copyright (c) 2010 Cloudsmith Inc. 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:
* Cloudsmith Inc. - initial API and implementation
*******************************************************************************/
package org.eclipse.equinox.internal.p2.ql.expression;
import org.eclipse.equinox.internal.p2.metadata.expression.Expression;
/**
* A function that obtains a class based on a String
*/
public final class BooleanFunction extends Function {
public BooleanFunction(Expression[] operands) {
super(assertLength(operands, 1, 1, KEYWORD_BOOLEAN));
}
boolean assertSingleArgumentClass(Object v) {
return v instanceof String || v instanceof Boolean;
}
Object createInstance(Object arg) {
if (arg instanceof String)
return Boolean.valueOf("true".equalsIgnoreCase((String) arg)); //$NON-NLS-1$
if (arg instanceof Boolean)
return arg;
return Boolean.FALSE;
}
public String getOperator() {
return KEYWORD_BOOLEAN;
}
}
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