| /* |
| * The Apache Software License, Version 1.1 |
| * |
| * Copyright (c) 2002-2003 The Apache Software Foundation. All rights |
| * reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in |
| * the documentation and/or other materials provided with the |
| * distribution. |
| * |
| * 3. The end-user documentation included with the redistribution, |
| * if any, must include the following acknowledgment: |
| * "This product includes software developed by the |
| * Apache Software Foundation (http://www.apache.org/)." |
| * Alternately, this acknowledgment may appear in the software itself, |
| * if and wherever such third-party acknowledgments normally appear. |
| * |
| * 4. The names "Xalan" and "Apache Software Foundation" must |
| * not be used to endorse or promote products derived from this |
| * software without prior written permission. For written |
| * permission, please contact apache@apache.org. |
| * |
| * 5. Products derived from this software may not be called "Apache", |
| * nor may "Apache" appear in their name, without prior written |
| * permission of the Apache Software Foundation. |
| * |
| * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED |
| * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR |
| * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
| * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
| * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
| * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| * ==================================================================== |
| * |
| * This software consists of voluntary contributions made by many |
| * individuals on behalf of the Apache Software Foundation and was |
| * originally based on software copyright (c) 2002, International |
| * Business Machines Corporation., http://www.ibm.com. For more |
| * information on the Apache Software Foundation, please see |
| * <http://www.apache.org/>. |
| */ |
| package org.apache.xpath.impl; |
| |
| import org.apache.xpath.expression.ConditionalExpr; |
| import org.apache.xpath.expression.Expr; |
| import org.apache.xpath.expression.Visitor; |
| import org.apache.xpath.impl.parser.Node; |
| import org.apache.xpath.impl.parser.SimpleNode; |
| import org.apache.xpath.impl.parser.XPath; |
| |
| |
| /** |
| * Implementation of if-then-else expression. |
| */ |
| public class ConditionalExprImpl extends ExprImpl implements ConditionalExpr |
| { |
| /** |
| * Constructor for ConditionalExprImpl. |
| * |
| * @param i |
| */ |
| public ConditionalExprImpl(int i) |
| { |
| super(i); |
| m_children = new Node[3]; |
| } |
| |
| /** |
| * Constructor for ConditionalExprImpl. |
| * |
| * @param p |
| * @param i |
| */ |
| public ConditionalExprImpl(XPath p, int i) |
| { |
| super(p, i); |
| m_children = new Node[3]; |
| } |
| |
| /** |
| * Constructor for ConditionalExprImpl. |
| * |
| * @param expr DOCUMENT ME! |
| */ |
| protected ConditionalExprImpl(ConditionalExprImpl expr) |
| { |
| super(expr.id); |
| m_children = new Node[3]; |
| System.arraycopy(expr.m_children, 0, m_children, 0, 3); |
| } |
| |
| /** |
| * Constructor for ConditionalExprImpl. |
| * |
| * @param test |
| * @param thenClause |
| * @param elseClause DOCUMENT ME! |
| */ |
| protected ConditionalExprImpl(Expr test, Expr thenClause, Expr elseClause) |
| { |
| super(); |
| m_children = new Node[3]; |
| m_children[0] = (Node) test; |
| m_children[1] = (Node) thenClause; |
| m_children[2] = (Node) elseClause; |
| } |
| |
| /** |
| * @see org.apache.xpath.expression.ConditionalExpr#getElseExpr() |
| */ |
| public Expr getElseExpr() |
| { |
| return (Expr) m_children[2]; |
| } |
| |
| /** |
| * @see org.apache.xpath.expression.ConditionalExpr#getTestExpr() |
| */ |
| public Expr getTestExpr() |
| { |
| return (Expr) m_children[0]; |
| } |
| |
| /** |
| * @see org.apache.xpath.expression.ConditionalExpr#getThenExpr() |
| */ |
| public Expr getThenExpr() |
| { |
| return (Expr) m_children[1]; |
| } |
| |
| /* (non-Javadoc) |
| * @see org.apache.xpath.expression.ConditionalExpr#setElseExpr(org.apache.xpath.expression.Expr) |
| */ |
| public void setElseExpr(Expr expr) |
| { |
| m_children[2] = (Node) expr; |
| } |
| |
| /* (non-Javadoc) |
| * @see org.apache.xpath.expression.ConditionalExpr#setTestExpr(org.apache.xpath.expression.Expr) |
| */ |
| public void setTestExpr(Expr expr) |
| { |
| m_children[0] = (Node) expr; |
| } |
| |
| /* (non-Javadoc) |
| * @see org.apache.xpath.expression.ConditionalExpr#setThenExpr(org.apache.xpath.expression.Expr) |
| */ |
| public void setThenExpr(Expr expr) |
| { |
| m_children[1] = (Node) expr; |
| } |
| |
| /** |
| * @see org.apache.xpath.expression.Expr#cloneExpression() |
| */ |
| public Expr cloneExpression() |
| { |
| return new ConditionalExprImpl(this); |
| } |
| |
| /** |
| * @see org.apache.xpath.expression.Expr#getExprType() |
| */ |
| public short getExprType() |
| { |
| return CONDITIONAL_EXPR; |
| } |
| |
| /** |
| * @see org.apache.xpath.expression.Visitable#visit(Visitor) |
| */ |
| public boolean visit(Visitor visitor) |
| { |
| if ( visitor.visitConditional(this) ) { |
| if ( getTestExpr().visit(visitor)) { |
| if ( getThenExpr().visit(visitor) ) { |
| return getElseExpr().visit(visitor); |
| } |
| } |
| } |
| return false; |
| } |
| |
| /** |
| * @see org.apache.xpath.impl.parser.Node#jjtAddChild(Node, int) |
| */ |
| public void jjtAddChild(Node n, int i) |
| { |
| if (((SimpleNode) n).canBeReduced()) |
| { |
| super.jjtAddChild(n.jjtGetChild(0), i); |
| } |
| else |
| { |
| super.jjtAddChild(n, i); |
| } |
| } |
| |
| /* (non-Javadoc) |
| * @see org.apache.xpath.impl.parser.SimpleNode#getString(java.lang.StringBuffer, boolean) |
| */ |
| public void getString(StringBuffer expr, boolean abbreviate) |
| { |
| expr.append("if ("); |
| ((ExprImpl) getTestExpr()).getString(expr, abbreviate); |
| expr.append(") then "); |
| ((ExprImpl) getThenExpr()).getString(expr, abbreviate); |
| expr.append(" else "); |
| ((ExprImpl) getElseExpr()).getString(expr, abbreviate); |
| } |
| } |