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Groovy: A powerful, dynamic language for the JVM
/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.codehaus.groovy.antlr;
import antlr.CommonAST;
import antlr.Token;
import antlr.collections.AST;
import java.util.ArrayList;
import java.util.List;
/**
* We have an AST subclass so we can track source information.
* Very odd that ANTLR doesn't do this by default.
*
* @author Mike Spille
* @author Jeremy Rayner
*/
public class GroovySourceAST extends CommonAST implements Comparable, SourceInfo {
private int line;
private int col;
private int lineLast;
private int colLast;
private String snippet;
public GroovySourceAST() {
}
public GroovySourceAST(Token t) {
super(t);
}
public void initialize(AST ast) {
super.initialize(ast);
line = ast.getLine();
col = ast.getColumn();
if (ast instanceof GroovySourceAST) {
GroovySourceAST node = (GroovySourceAST)ast;
lineLast = node.getLineLast();
colLast = node.getColumnLast();
}
}
public void initialize(Token t) {
super.initialize(t);
line = t.getLine();
col = t.getColumn();
if (t instanceof SourceInfo) {
SourceInfo info = (SourceInfo) t;
lineLast = info.getLineLast();
colLast = info.getColumnLast();
}
}
public void setLast(Token last) {
lineLast = last.getLine();
colLast = last.getColumn();
}
public int getLineLast() {
return lineLast;
}
public void setLineLast(int lineLast) {
this.lineLast = lineLast;
}
public int getColumnLast() {
return colLast;
}
public void setColumnLast(int colLast) {
this.colLast = colLast;
}
public void setLine(int line) {
this.line = line;
}
public int getLine() {
return (line);
}
public void setColumn(int column) {
this.col = column;
}
public int getColumn() {
return (col);
}
public void setSnippet(String snippet) {
this.snippet = snippet;
}
public String getSnippet() {
return snippet;
}
public int compareTo(Object object) {
if (object == null) {
return 0;
}
if (!(object instanceof AST)) {
return 0;
}
AST that = (AST) object;
// todo - possibly check for line/col with values of 0 or less...
if (this.getLine() < that.getLine()) {
return -1;
}
if (this.getLine() > that.getLine()) {
return 1;
}
if (this.getColumn() < that.getColumn()) {
return -1;
}
if (this.getColumn() > that.getColumn()) {
return 1;
}
return 0;
}
public GroovySourceAST childAt(int position) {
List list = new ArrayList();
AST child = this.getFirstChild();
while (child != null) {
list.add(child);
child = child.getNextSibling();
}
try {
return (GroovySourceAST)list.get(position);
} catch (IndexOutOfBoundsException e) {
return null;
}
}
public GroovySourceAST childOfType(int type) {
AST child = this.getFirstChild();
while (child != null) {
if (child.getType() == type) { return (GroovySourceAST)child; }
child = child.getNextSibling();
}
return null;
}
public List childrenOfType(int type) {
List result = new ArrayList();
AST child = this.getFirstChild();
while (child != null) {
if (child.getType() == type) { result.add((GroovySourceAST) child); }
child = child.getNextSibling();
}
return result;
}
}