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/***** BEGIN LICENSE BLOCK *****
* Version: EPL 2.0/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Eclipse Public
* 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.eclipse.org/legal/epl-v20.html
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* Copyright (C) 2006 Ola Bini <ola@ologix.com>
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the EPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the EPL, the GPL or the LGPL.
***** END LICENSE BLOCK *****/
package org.jruby.runtime;
import org.jruby.RubyModule;
import org.jruby.parser.StaticScope;
import org.jruby.runtime.builtin.IRubyObject;
import org.jruby.util.ArraySupport;
/**
* A Block implemented using a Java-based BlockCallback implementation. For
* lightweight block logic within Java code.
*/
public class CallBlock extends BlockBody {
private final BlockCallback callback;
private final StaticScope dummyScope;
public static Block newCallClosure(IRubyObject self, RubyModule imClass, Signature signature, BlockCallback callback, ThreadContext context) {
return newCallClosure(context, self, signature, callback);
}
public static Block newCallClosure(ThreadContext context, IRubyObject self, Signature signature, BlockCallback callback) {
Binding binding = context.currentBinding(self, Visibility.PUBLIC);
BlockBody body = new CallBlock(context, signature, callback);
return new Block(body, binding);
}
private CallBlock(ThreadContext context, Signature signature, BlockCallback callback) {
super(signature);
this.callback = callback;
this.dummyScope = context.runtime.getStaticScopeFactory().getDummyScope();
}
static IRubyObject[] adjustArgs(Block block, IRubyObject[] args) {
Signature signature = block.getSignature();
int required = signature.required();
if (required > 0 && required < args.length && signature.isFixed()) args = ArraySupport.newCopy(args, required);
return args;
}
@Override
public IRubyObject call(ThreadContext context, Block block, IRubyObject[] args) {
return callback.call(context, adjustArgs(block, args), Block.NULL_BLOCK);
}
@Override
public IRubyObject call(ThreadContext context, Block block, IRubyObject[] args, Block blockArg) {
return callback.call(context, adjustArgs(block, args), blockArg);
}
@Override
public IRubyObject yieldSpecific(ThreadContext context, Block block) {
return callback.call(context, IRubyObject.NULL_ARRAY, Block.NULL_BLOCK);
}
@Override
public IRubyObject yieldSpecific(ThreadContext context, Block block, IRubyObject arg0) {
return callback.call(context, arg0, Block.NULL_BLOCK);
}
@Override
protected IRubyObject doYield(ThreadContext context, Block block, IRubyObject value) {
return callback.call(context, value, Block.NULL_BLOCK);
}
@Override
protected IRubyObject doYield(ThreadContext context, Block block, IRubyObject[] args, IRubyObject self) {
return callback.call(context, adjustArgs(block, args));
}
public StaticScope getStaticScope() {
return dummyScope;
}
public void setStaticScope(StaticScope newScope) {
// ignore
}
public String getFile() {
return "(internal)";
}
public int getLine() {
return -1;
}
}