| /******************************************************************************* |
| * 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(); |
| } |
| } |