| /******************************************************************************* |
| * Copyright (c) 2010, 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.IExpressionVisitor; |
| |
| /** |
| * The abstract baseclass for all N-ary expressions |
| */ |
| public abstract class NAry extends Expression { |
| public final Expression[] operands; |
| |
| protected NAry(Expression[] operands) { |
| this.operands = operands; |
| } |
| |
| @Override |
| public boolean accept(IExpressionVisitor visitor) { |
| if (super.accept(visitor)) |
| for (Expression operand : operands) |
| if (!operand.accept(visitor)) |
| return false; |
| return true; |
| } |
| |
| @Override |
| public int compareTo(Expression e) { |
| int cmp = super.compareTo(e); |
| if (cmp == 0) |
| cmp = compare(operands, ((NAry) e).operands); |
| return cmp; |
| } |
| |
| @Override |
| public boolean equals(Object o) { |
| return super.equals(o) && equals(operands, ((NAry) o).operands); |
| } |
| |
| @Override |
| public abstract String getOperator(); |
| |
| @Override |
| public int hashCode() { |
| return hashCode(operands); |
| } |
| |
| @Override |
| public void toString(StringBuffer bld, Variable rootVariable) { |
| appendOperand(bld, rootVariable, operands[0], getPriority()); |
| for (int idx = 1; idx < operands.length; ++idx) { |
| bld.append(' '); |
| bld.append(getOperator()); |
| bld.append(' '); |
| appendOperand(bld, rootVariable, operands[idx], getPriority()); |
| } |
| } |
| |
| @Override |
| int countAccessToEverything() { |
| int cnt = 0; |
| for (Expression operand : operands) |
| cnt += operand.countAccessToEverything(); |
| return cnt; |
| } |
| } |