| /******************************************************************************* |
| * Copyright (c) 2006 Oracle Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * Oracle Corporation - initial API and implementation |
| *******************************************************************************/ |
| |
| package org.eclipse.bpel.xpath10; |
| |
| /** |
| * The base expression class for XPath semantic tree hierarchy. |
| * |
| * @author Michal Chmielewski (michal.chmielewski@oracle.com) |
| * @date Aug 26, 2008 |
| * |
| */ |
| |
| @SuppressWarnings("nls") |
| |
| public class Expr { |
| |
| String fText ; |
| int fStartPosition = -1; |
| int fEndPosition = -1; |
| |
| boolean fWrapWithParenthesis = false; |
| |
| /** |
| * Brand new shiny Expr object. |
| * @param text |
| */ |
| public Expr (String text) { |
| fText = text; |
| } |
| |
| |
| /** |
| * @return the expression as a text |
| */ |
| public final String getText() { |
| StringBuilder sb = new StringBuilder(); |
| if (fWrapWithParenthesis) { |
| sb.append("("); |
| } |
| sb.append(asText()); |
| if (fWrapWithParenthesis) { |
| sb.append(")"); |
| } |
| return sb.toString(); |
| }; |
| |
| /** |
| * @see java.lang.Object#toString() |
| */ |
| @Override |
| public String toString () { |
| StringBuilder sb = new StringBuilder(); |
| sb.append("{").append(getClass().getSimpleName()).append(",").append(asString()).append("}") ; |
| return sb.toString(); |
| } |
| |
| protected String asString () { |
| return getText(); |
| } |
| |
| protected String asText () { |
| return fText; |
| } |
| |
| /** |
| * @return whether the expression is wrapped in parenthesis. |
| */ |
| public boolean isWrapParen () { |
| return fWrapWithParenthesis; |
| } |
| |
| /** |
| * @param wrap |
| */ |
| public void setWrapParen ( boolean wrap ) { |
| fWrapWithParenthesis = wrap; |
| } |
| |
| /** |
| * This is useful for error reporting :-) |
| * |
| * @return the end position of the expression in the "stream" that it was parsed from |
| */ |
| public int getEndPosition() { |
| return fEndPosition; |
| } |
| |
| /** |
| * This is useful for error reporting :-) |
| * |
| * @return the start position of the expression in the "stream" that it was parsed from |
| */ |
| |
| public int getPosition() { |
| return fStartPosition; |
| } |
| |
| /** |
| * Set the start and end position of the expression in the input "stream" it was parsed from. |
| * The parser uses this to provide location information to the semantic tree model. |
| * |
| * @param start |
| * @param end |
| */ |
| public void setPosition (int start, int end) { |
| fStartPosition = start; |
| fEndPosition = end; |
| } |
| } |