/* * Copyright (c) 2013, OpenCloudDB/MyCAT and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software;Designed and Developed mainly by many Chinese * opensource volunteers. you can redistribute it and/or modify it under the * terms of the GNU General Public License version 2 only, as published by the * Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Any questions about this component can be directed to it's project Web address * https://code.google.com/p/opencloudb/. * */ package com.akiban.sql.parser; import com.akiban.sql.StandardException; /** * A BinaryListOperatorNode represents a built-in "binary" operator with a single * operand on the left of the operator and a list of operands on the right. * This covers operators such as IN and BETWEEN. * */ public abstract class BinaryListOperatorNode extends ValueNode { protected String methodName; /* operator used for error messages */ protected String operator; protected ValueNode leftOperand; protected ValueNodeList rightOperandList; /** * Initializer for a BinaryListOperatorNode * * @param leftOperand The left operand of the node * @param rightOperandList The right operand list of the node * @param operator String representation of operator */ public void init(Object leftOperand, Object rightOperandList, Object operator, Object methodName) { this.leftOperand = (ValueNode)leftOperand; this.rightOperandList = (ValueNodeList)rightOperandList; this.operator = (String)operator; this.methodName = (String)methodName; } /** * Fill this node with a deep copy of the given node. */ public void copyFrom(QueryTreeNode node) throws StandardException { super.copyFrom(node); BinaryListOperatorNode other = (BinaryListOperatorNode)node; this.methodName = other.methodName; this.operator = other.operator; this.leftOperand = (ValueNode) getNodeFactory().copyNode(other.leftOperand, getParserContext()); this.rightOperandList = (ValueNodeList) getNodeFactory().copyNode(other.rightOperandList, getParserContext()); } /** * Convert this object to a String. See comments in QueryTreeNode.java * for how this should be done for tree printing. * * @return This object as a String */ public String toString() { return "operator: " + operator + "\n" + "methodName: " + methodName + "\n" + super.toString(); } /** * Prints the sub-nodes of this object. See QueryTreeNode.java for * how tree printing is supposed to work. * * @param depth The depth of this node in the tree */ public void printSubNodes(int depth) { super.printSubNodes(depth); if (leftOperand != null) { printLabel(depth, "leftOperand: "); leftOperand.treePrint(depth + 1); } if (rightOperandList != null) { printLabel(depth, "rightOperandList: "); rightOperandList.treePrint(depth + 1); } } /** * Set the leftOperand to the specified ValueNode * * @param newLeftOperand The new leftOperand */ public void setLeftOperand(ValueNode newLeftOperand) { leftOperand = newLeftOperand; } /** * Get the leftOperand * * @return The current leftOperand. */ public ValueNode getLeftOperand() { return leftOperand; } /** * Set the rightOperandList to the specified ValueNodeList * * @param newRightOperandList The new rightOperandList * */ public void setRightOperandList(ValueNodeList newRightOperandList) { rightOperandList = newRightOperandList; } /** * Get the rightOperandList * * @return The current rightOperandList. */ public ValueNodeList getRightOperandList() { return rightOperandList; } /** * Return whether or not this expression tree represents a constant expression. * * @return Whether or not this expression tree represents a constant expression. */ public boolean isConstantExpression() { return (leftOperand.isConstantExpression() && rightOperandList.isConstantExpression()); } /** * Accept the visitor for all visitable children of this node. * * @param v the visitor * * @exception StandardException on error */ void acceptChildren(Visitor v) throws StandardException { super.acceptChildren(v); if (leftOperand != null) { leftOperand = (ValueNode)leftOperand.accept(v); } if (rightOperandList != null) { rightOperandList = (ValueNodeList)rightOperandList.accept(v); } } /** * @inheritDoc */ protected boolean isEquivalent(ValueNode o) throws StandardException { if (!isSameNodeType(o)) { return false; } BinaryListOperatorNode other = (BinaryListOperatorNode)o; if (!operator.equals(other.operator) || !leftOperand.isEquivalent(other.getLeftOperand())) { return false; } if (!rightOperandList.isEquivalent(other.rightOperandList)) { return false; } return true; } }