org.mvel2.integration.impl.PrecachedMapVariableResolver Maven / Gradle / Ivy

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package org.mvel2.integration.impl;

import static org.mvel2.DataConversion.canConvert;
import static org.mvel2.DataConversion.convert;

import java.util.Map;

import org.mvel2.integration.VariableResolver;

public class PrecachedMapVariableResolver implements VariableResolver {

    private String name;
    private Class knownType;
    private Map.Entry entry;

    public PrecachedMapVariableResolver(Map.Entry entry, String name) {
        this.entry = entry;
        this.name = name;
    }

    public PrecachedMapVariableResolver(Map.Entry entry, String name, Class knownType) {
        this.name = name;
        this.knownType = knownType;
        this.entry = entry;
    }

    public void setStaticType(Class knownType) {
        this.knownType = knownType;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public Class getType() {
        return knownType;
    }

    public Object getValue() {
        return entry.getValue();
    }

    public void setValue(Object value) {
        if (knownType != null && value != null && value.getClass() != knownType) {
            Class t = value.getClass();
            if (!canConvert(knownType, t)) {
                throw new RuntimeException("cannot assign " + value.getClass().getName() + " to type: " + knownType.getName());
            }
            try {
                value = convert(value, knownType);
            } catch (Exception e) {
                throw new RuntimeException("cannot convert value of " + value.getClass().getName() + " to: " + knownType.getName());
            }
        }

        //noinspection unchecked
        entry.setValue(value);
    }

    public int getFlags() {
        return 0;
    }
}