/*******************************************************************************
* Copyright (c) 2007, 2008 Intel 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:
* Intel Corporation - Initial API and implementation
*******************************************************************************/
package org.eclipse.cdt.internal.core.cdtvariables;
import org.eclipse.cdt.core.cdtvariables.ICdtVariable;
import org.eclipse.cdt.core.cdtvariables.ICdtVariablesContributor;
import org.eclipse.cdt.core.settings.model.ICConfigurationDescription;
import org.eclipse.cdt.utils.cdtvariables.ICdtVariableSupplier;
import org.eclipse.cdt.utils.cdtvariables.IVariableContextInfo;
import org.eclipse.cdt.utils.cdtvariables.SupplierBasedCdtVariableManager;
public class BuildSystemVariableSupplier extends CoreMacroSupplierBase {
private static BuildSystemVariableSupplier fInstance;
private BuildSystemVariableSupplier(){
}
public static BuildSystemVariableSupplier getInstance(){
if(fInstance == null){
fInstance = new BuildSystemVariableSupplier();
}
return fInstance;
}
private class ExtensionMacroProvider extends CdtVariableManager{
private IVariableContextInfo fStartInfo;
private int fContextType;
private Object fContextData;
private boolean fStartInitialized;
public ExtensionMacroProvider(int contextType, Object contextData){
fContextType = contextType;
fContextData = contextData;
}
@Override
public IVariableContextInfo getMacroContextInfo(int contextType,Object contextData){
IVariableContextInfo startInfo = getStartInfo();
if(contextType == fContextType &&
contextData == fContextData)
return startInfo;
IVariableContextInfo info = super.getMacroContextInfo(contextType, contextData);
if(info == null)
return null;
if(SupplierBasedCdtVariableManager.checkParentContextRelation(startInfo,info))
return info;
return null;
}
protected IVariableContextInfo getStartInfo(){
if(fStartInfo == null && !fStartInitialized){
IVariableContextInfo info = super.getMacroContextInfo(fContextType,fContextData);
if(info != null){
ICdtVariableSupplier suppliers[] = info.getSuppliers();
suppliers = filterValidSuppliers(suppliers);
if(suppliers != null)
fStartInfo = new DefaultVariableContextInfo(fContextType,fContextData,suppliers);
else
fStartInfo = info.getNext();
fStartInitialized = true;
}
fStartInitialized = true;
}
return fStartInfo;
}
protected ICdtVariableSupplier[] filterValidSuppliers(ICdtVariableSupplier suppliers[]){
if(suppliers == null)
return null;
int i = 0, j = 0;
for(i = 0; i < suppliers.length; i++){
if(suppliers[i] == this)
break;
}
if(i >= suppliers.length)
return null;
int startNum = i + 1;
ICdtVariableSupplier validSuppliers[] =
new ICdtVariableSupplier[suppliers.length - startNum];
for(i = startNum, j = 0; i < suppliers.length; i++, j++)
validSuppliers[j] = suppliers[i];
return validSuppliers;
}
}
@Override
protected ICdtVariable getMacro(String name, int type, Object data) {
ICConfigurationDescription des = (ICConfigurationDescription)data;
ICdtVariablesContributor cr = des.getBuildVariablesContributor();
if(cr != null)
return cr.getVariable(name, new ExtensionMacroProvider(type, data));
return null;
}
@Override
protected ICdtVariable[] getMacros(int type, Object data) {
ICConfigurationDescription des = (ICConfigurationDescription)data;
ICdtVariablesContributor cr = des.getBuildVariablesContributor();
if(cr != null)
return cr.getVariables(new ExtensionMacroProvider(type, data));
return new ICdtVariable[0];
}
}