BlockInstruction.java

/*
 * JBoss, Home of Professional Open Source.
 * See the COPYRIGHT.txt file distributed with this work for information
 * regarding copyright ownership.  Some portions may be licensed
 * to Red Hat, Inc. under one or more contributor license agreements.
 * 
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 * 
 * This library 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
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 * 02110-1301 USA.
 */

package org.teiid.query.processor.proc;

import static org.teiid.query.analysis.AnalysisRecord.*;

import org.teiid.client.plan.PlanNode;
import org.teiid.common.buffer.BlockedException;
import org.teiid.core.TeiidComponentException;
import org.teiid.core.TeiidProcessingException;

public class BlockInstruction extends ProgramInstruction {

    private Program program;

    public BlockInstruction(Program ifProgram) {
        this.program = ifProgram;
    }

    public void process(ProcedurePlan procEnv)
        throws BlockedException, TeiidComponentException, TeiidProcessingException {
        procEnv.push(program);
    }

    public Program getProgram(){ 
        return this.program;
    }

    /**
     * Returns a deep clone
     */
    public BlockInstruction clone(){
        return new BlockInstruction(this.program.clone());
    }

    public String toString() {
        return "BLOCK INSTRUCTION:\n " + this.program; //$NON-NLS-1$
    }

    public PlanNode getDescriptionProperties() {
    	PlanNode props = new PlanNode("BLOCK"); //$NON-NLS-1$
        props.addProperty(PROP_PROGRAM, this.program.getDescriptionProperties());
        return props;
    }
    
    @Override
    public Boolean requiresTransaction(boolean transactionalReads) {
        return program.requiresTransaction(transactionalReads);
    }
    
}