/*
* Copyright 2010 JBoss Inc
*
* Licensed 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.drools.eclipse.editors;
import java.util.Iterator;
import org.drools.compiler.lang.descr.AttributeDescr;
import org.drools.compiler.lang.descr.BaseDescr;
import org.drools.compiler.lang.descr.FunctionDescr;
import org.drools.compiler.lang.descr.FunctionImportDescr;
import org.drools.compiler.lang.descr.GlobalDescr;
import org.drools.compiler.lang.descr.ImportDescr;
import org.drools.compiler.lang.descr.PackageDescr;
import org.drools.compiler.lang.descr.RuleDescr;
/**
* Util class for searching Descr tree.
*/
public final class DescrUtil {
private DescrUtil() {
}
public static BaseDescr getDescr(BaseDescr descr, int offset) {
if (descr instanceof PackageDescr) {
PackageDescr packageDescr = (PackageDescr) descr;
// rules
for (Iterator iterator = packageDescr.getRules().iterator(); iterator.hasNext(); ) {
RuleDescr ruleDescr = (RuleDescr) iterator.next();
if (ruleDescr != null) {
BaseDescr result = getDescr(ruleDescr, offset);
if (result != null) {
return result;
}
}
}
// imports
for (Iterator iterator = packageDescr.getImports().iterator(); iterator.hasNext(); ) {
ImportDescr importDescr = (ImportDescr) iterator.next();
if (importDescr != null) {
BaseDescr result = getDescr(importDescr, offset);
if (result != null) {
return result;
}
}
}
// function imports
for (Iterator iterator = packageDescr.getFunctionImports().iterator(); iterator.hasNext(); ) {
FunctionImportDescr functionImportDescr = (FunctionImportDescr) iterator.next();
if (functionImportDescr != null) {
BaseDescr result = getDescr(functionImportDescr, offset);
if (result != null) {
return result;
}
}
}
// functions
for (Iterator iterator = packageDescr.getFunctions().iterator(); iterator.hasNext(); ) {
FunctionDescr functionDescr = (FunctionDescr) iterator.next();
if (functionDescr != null) {
BaseDescr result = getDescr(functionDescr, offset);
if (result != null) {
return result;
}
}
}
// attributes
for (Iterator iterator = packageDescr.getAttributes().iterator(); iterator.hasNext(); ) {
AttributeDescr attributeDescr = (AttributeDescr) iterator.next();
if (attributeDescr != null) {
BaseDescr result = getDescr(attributeDescr, offset);
if (result != null) {
return result;
}
}
}
// globals
for (Iterator iterator = packageDescr.getGlobals().iterator(); iterator.hasNext(); ) {
GlobalDescr globalDescr = (GlobalDescr) iterator.next();
if (globalDescr != null) {
BaseDescr result = getDescr(globalDescr, offset);
if (result != null) {
return result;
}
}
}
return null;
} else {
if (offset < descr.getStartCharacter() || offset > descr.getEndCharacter()) {
return null;
}
if(descr instanceof RuleDescr) {
RuleDescr ruleDescr = (RuleDescr) descr;
// rules attributes
for (Iterator iterator = ruleDescr.getAttributes().values().iterator(); iterator.hasNext(); ) {
AttributeDescr attributeDescr = (AttributeDescr) iterator.next();
if (attributeDescr != null) {
BaseDescr result = getDescr(attributeDescr, offset);
if (result != null) {
return result;
}
}
}
}
// TODO: select subDescr if possible
return descr;
}
}
}