Package org.drools.command.runtime.rule

Source Code of org.drools.command.runtime.rule.GetObjectCommand

/*
* 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.command.runtime.rule;

import javax.xml.bind.annotation.XmlAccessType;
import javax.xml.bind.annotation.XmlAccessorType;
import javax.xml.bind.annotation.XmlAttribute;

import org.drools.command.IdentifiableResult;
import org.drools.command.impl.GenericCommand;
import org.drools.command.impl.KnowledgeCommandContext;
import org.drools.common.DefaultFactHandle;
import org.drools.impl.StatefulKnowledgeSessionImpl;
import org.kie.command.Context;
import org.kie.runtime.StatefulKnowledgeSession;
import org.kie.runtime.rule.FactHandle;

@XmlAccessorType(XmlAccessType.NONE)
public class GetObjectCommand
    implements
    GenericCommand<Object>, IdentifiableResult {

    private FactHandle factHandle;
    private String     outIdentifier;
   
    public GetObjectCommand() { }

    public GetObjectCommand(FactHandle factHandle) {
        this.factHandle = factHandle;
    }
   
    public GetObjectCommand(FactHandle factHandle, String outIdentifier) {
        this.factHandle = factHandle;
        this.outIdentifier = outIdentifier;
    }

    @XmlAttribute(name="out-identifier", required=true)
    public String getOutIdentifier() {
        return outIdentifier;
    }

    public void setOutIdentifier(String outIdentifier) {
        this.outIdentifier = outIdentifier;
    }

    @XmlAttribute(name="fact-handle", required=true)
    public void setFactHandleFromString(String factHandleId) {
        factHandle = new DefaultFactHandle(factHandleId);
    }
   
    public String getFactHandleFromString() {
        return factHandle.toExternalForm();
    }

    public Object execute(Context context) {
        StatefulKnowledgeSession ksession = ((KnowledgeCommandContext) context).getStatefulKnowledgesession();
       
        Object object = ksession.getObject( factHandle );
       
        if (this.outIdentifier != null) {
            ((StatefulKnowledgeSessionImpl)ksession).session.getExecutionResult()
                .getResults().put( this.outIdentifier, object );
        }
       
        return object;
    }
   
    public FactHandle getFactHandle() {
        return this.factHandle;
    }

    public String toString() {
        return "session.getObject( " + factHandle + " );";
    }

}
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