org.mvel2.util.SharedVariableSpaceModel Maven / Gradle / Ivy

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package org.mvel2.util;

import org.mvel2.integration.VariableResolver;
import org.mvel2.integration.VariableResolverFactory;
import org.mvel2.integration.impl.IndexVariableResolver;
import org.mvel2.integration.impl.IndexedVariableResolverFactory;
import org.mvel2.integration.impl.SimpleValueResolver;

/**
 * @author Mike Brock .
 */
public class SharedVariableSpaceModel extends VariableSpaceModel {

    private VariableResolver[] cachedGlobalResolvers;

    public SharedVariableSpaceModel(String[] allVars, Object[] vals) {
        this.allVars = allVars;

        cachedGlobalResolvers = new VariableResolver[vals.length];
        for (int i = 0; i < vals.length; i++) {
            cachedGlobalResolvers[i] = new IndexVariableResolver(i, vals);
        }
    }

    public VariableResolverFactory createFactory() {
        VariableResolver[] resolvers = new VariableResolver[allVars.length];
        for (int i = 0; i < resolvers.length; i++) {
            if (i >= cachedGlobalResolvers.length) {
                resolvers[i] = new SimpleValueResolver(null);
            } else {
                resolvers[i] = cachedGlobalResolvers[i];
            }
        }

        return new IndexedVariableResolverFactory(allVars, resolvers);
    }
}