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/*******************************************************************************
* Copyright (c) 2009, 2017 Cloudsmith Inc. 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:
* Cloudsmith Inc. - initial API and implementation
*******************************************************************************/
package org.eclipse.equinox.internal.p2.metadata.expression;
import org.eclipse.equinox.p2.metadata.expression.IEvaluationContext;
import org.eclipse.equinox.p2.metadata.expression.IExpressionVisitor;
/**
* A function that executes some code
*/
public class LambdaExpression extends Unary {
protected final Variable each;
protected LambdaExpression(Variable each, Expression body) {
super(body);
this.each = each;
}
@Override
public boolean accept(IExpressionVisitor visitor) {
return super.accept(visitor) && each.accept(visitor);
}
@Override
public int compareTo(Expression e) {
int cmp = super.compareTo(e);
if (cmp == 0)
cmp = each.compareTo(((LambdaExpression) e).each);
return cmp;
}
@Override
public boolean equals(Object o) {
return super.equals(o) && each.equals(((LambdaExpression) o).each);
}
@Override
public int hashCode() {
int result = 31 + operand.hashCode();
return 31 * result + each.hashCode();
}
@Override
public int getExpressionType() {
return TYPE_LAMBDA;
}
@Override
public void toString(StringBuffer bld, Variable rootVariable) {
each.toString(bld, rootVariable);
bld.append(" | "); //$NON-NLS-1$
appendOperand(bld, rootVariable, operand, IExpressionConstants.PRIORITY_COMMA);
}
public Variable getItemVariable() {
return each;
}
@Override
public String getOperator() {
return "|"; //$NON-NLS-1$
}
@Override
public int getPriority() {
return IExpressionConstants.PRIORITY_LAMBDA;
}
public IEvaluationContext prolog(IEvaluationContext context) {
return EvaluationContext.create(context, each);
}
@Override
int countAccessToEverything() {
return 2 * super.countAccessToEverything();
}
}