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/*
* RHQ Management Platform
* Copyright 2012, Red Hat Middleware LLC, and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
package org.rhq.bindings.util;
import java.io.Reader;
import java.net.URI;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import org.rhq.scripting.ScriptSourceProvider;
/**
* An implementation of the script source provider that uses a collection of another
* providers to locate the scripts.
*
* The providers are tried in the order they were supplied to the constructor of this class
* and the first script source provider that manages to provide a non-null reader for
* given URI "wins".
*
* @author Lukas Krejci
*/
public class MultiScriptSourceProvider implements ScriptSourceProvider {
private Collection providers;
public MultiScriptSourceProvider(Collection providers) {
this.providers = new ArrayList(providers);
}
public MultiScriptSourceProvider(ScriptSourceProvider... providers) {
this.providers = new ArrayList(Arrays.asList(providers));
}
@Override
public Reader getScriptSource(URI scriptUri) {
for (ScriptSourceProvider provider : providers) {
Reader rdr = provider.getScriptSource(scriptUri);
if (rdr != null) {
return rdr;
}
}
return null;
}
}