/*******************************************************************************
* Copyright (c) 2007 Red Hat, Inc.
* Distributed under license by Red Hat, Inc. All rights reserved.
* This program is 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:
* Red Hat, Inc. - initial API and implementation
******************************************************************************/
package org.jboss.tools.common.el.internal.core.model;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import org.jboss.tools.common.el.core.model.ELExpression;
import org.jboss.tools.common.el.core.model.ELInstance;
import org.jboss.tools.common.el.core.model.ELObjectType;
import org.jboss.tools.common.el.core.parser.LexicalToken;
import org.jboss.tools.common.el.core.parser.SyntaxError;
import org.jboss.tools.common.el.internal.core.parser.token.EndELTokenDescription;
import org.jboss.tools.common.el.internal.core.parser.token.StartELTokenDescription;
/**
* '#{' expression '}'
* @author V. Kabanovich
*/
public class ELInstanceImpl extends ELObjectImpl implements ELInstance {
public static final List<SyntaxError> EMPTY = Collections.unmodifiableList(new ArrayList<SyntaxError>());
ELExpressionImpl expression;
List<SyntaxError> errors = null;
public ELInstanceImpl() {
}
public LexicalToken getOpenInstanceToken() {
LexicalToken result = getFirstToken();
if(result != null && result.getType() == StartELTokenDescription.START_EL) {
return result;
} else {
return null;
}
}
public LexicalToken getCloseInstanceToken() {
LexicalToken result = getLastToken();
if(result != null && result.getType() == EndELTokenDescription.END_EL) {
return result;
} else {
return null;
}
}
public ELExpression getExpression() {
return expression;
}
public List<SyntaxError> getErrors() {
return errors != null ? errors : EMPTY;
}
public void addChild(ELObjectImpl child) {
if(child instanceof ELExpressionImpl) {
setExpression((ELExpressionImpl)child);
} else {
throw new IllegalArgumentException("EL instance can have only EL expression as child."); //$NON-NLS-1$
}
}
public void setExpression(ELExpressionImpl expression) {
if(this.expression == expression) {
return;
}
if(this.expression != null) {
removeChild(this.expression);
}
this.expression = expression;
if(expression != null) {
super.addChild(expression);
}
}
public String toString() {
StringBuffer sb = new StringBuffer();
if(getOpenInstanceToken() != null) {
sb.append(getOpenInstanceToken().getText());
}
if(expression != null) {
sb.append(expression.toString());
}
if(getCloseInstanceToken() != null) {
sb.append(getCloseInstanceToken().getText());
}
return sb.toString();
}
public ELObjectType getType() {
return ELObjectType.EL_INSTANCE;
}
public boolean contains(int position) {
if(position < getFirstToken().getStart()) return false;
LexicalToken l = getLastToken();
if(l == null) l = getFirstToken();
int end = l.getStart() + l.getLength();
if(position > end) return false;
if(getCloseInstanceToken() != null && position == end) return false;
return true;
}
public void addError(SyntaxError error) {
if(errors == null) {
errors = new ArrayList<SyntaxError>();
}
errors.add(error);
}
}