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

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TBEL is a powerful expression language for ThingsBoard platform user-defined functions. Original implementation is based on MVEL.

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/**
 * MVEL 2.0
 * Copyright (C) 2007 The Codehaus
 * Mike Brock, Dhanji Prasanna, John Graham, Mark Proctor
 *
 * 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.mvel2.integration.impl;

import org.mvel2.ParserContext;
import org.mvel2.integration.VariableResolver;
import org.mvel2.util.MethodStub;

import java.lang.reflect.Method;
import java.util.HashMap;
import java.util.Map;

/**
 * @author Christopher Brock
 */
public class StaticMethodImportResolverFactory extends BaseVariableResolverFactory {
  public StaticMethodImportResolverFactory(ParserContext ctx) {
    this.variableResolvers = new HashMap();
    for (Map.Entry entry : ctx.getImports().entrySet()) {
      if (entry.getValue() instanceof Method) {
        createVariable(entry.getKey(), entry.getValue());
      }
    }
  }

  public StaticMethodImportResolverFactory() {
    this.variableResolvers = new HashMap();
  }

  public VariableResolver createVariable(String name, Object value) {
    if (value instanceof Method) value = new MethodStub((Method) value);

    StaticMethodImportResolver methodResolver = new StaticMethodImportResolver(name, (MethodStub) value);
    this.variableResolvers.put(name, methodResolver);
    return methodResolver;
  }

  public VariableResolver createVariable(String name, Object value, Class type) {
    return null;
  }

  public boolean isTarget(String name) {
    return this.variableResolvers.containsKey(name);
  }

  public boolean isResolveable(String name) {
    return isTarget(name) || isNextResolveable(name);
  }

  public Map getImportedMethods() {
    Map im = new HashMap();
    for (Map.Entry e : this.variableResolvers.entrySet()) {
      im.put(e.getKey(), (Method) e.getValue().getValue());
    }
    return im;
  }

}