/*******************************************************************************
* 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;
}
}