content: /*
   * Copyright 2010-2025 Hyland Software, Inc. and its affiliates.
   *
   * 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.activiti.core.el.juel.util;
  
  import jakarta.el.ArrayELResolver;
  import jakarta.el.BeanELResolver;
  import jakarta.el.CompositeELResolver;
  import jakarta.el.ELContext;
  import jakarta.el.ELResolver;
  import jakarta.el.ListELResolver;
  import jakarta.el.MapELResolver;
  import jakarta.el.ResourceBundleELResolver;
  import java.beans.FeatureDescriptor;
  import java.util.Iterator;
  
  /**
   * Simple resolver implementation. This resolver handles root properties (top-level identifiers).
   * Resolving "real" properties (<code>base != null</code>) is delegated to a resolver specified at
   * construction time.
   *
   * @author Christoph Beck
   */
  public class SimpleResolver extends ELResolver {
  
      private static final ELResolver DEFAULT_RESOLVER_READ_ONLY = new CompositeELResolver() {
          {
              add(new ArrayELResolver(true));
              add(new ListELResolver(true));
              add(new MapELResolver(true));
              add(new ResourceBundleELResolver());
              add(new BeanELResolver(true));
          }
      };
      private static final ELResolver DEFAULT_RESOLVER_READ_WRITE = new CompositeELResolver() {
          {
              add(new ArrayELResolver(false));
              add(new ListELResolver(false));
              add(new MapELResolver(false));
              add(new ResourceBundleELResolver());
              add(new BeanELResolver(false));
          }
      };
  
      private final RootPropertyResolver root;
      private final CompositeELResolver delegate;
  
      /**
       * Create a resolver capable of resolving top-level identifiers. Everything else is passed to
       * the supplied delegate.
       */
      public SimpleResolver(ELResolver resolver, boolean readOnly) {
          delegate = new CompositeELResolver();
          delegate.add(root = new RootPropertyResolver(readOnly));
          delegate.add(resolver);
      }
  
      /**
       * Create a read/write resolver capable of resolving top-level identifiers. Everything else is
       * passed to the supplied delegate.
       */
      public SimpleResolver(ELResolver resolver) {
          this(resolver, false);
      }
  
      /**
       * Create a resolver capable of resolving top-level identifiers, array values, list values, map
       * values, resource values and bean properties.
       */
      public SimpleResolver(boolean readOnly) {
          this(readOnly ? DEFAULT_RESOLVER_READ_ONLY : DEFAULT_RESOLVER_READ_WRITE, readOnly);
      }
  
      /**
       * Create a read/write resolver capable of resolving top-level identifiers, array values, list
       * values, map values, resource values and bean properties.
       */
      public SimpleResolver() {
          this(DEFAULT_RESOLVER_READ_WRITE, false);
      }
  
      /**
       * Answer our root resolver which provides an API to access top-level properties.
       *
       * @return root property resolver
       */
      public RootPropertyResolver getRootPropertyResolver() {
          return root;
      }
  
      @Override
      public Class<?> getCommonPropertyType(ELContext context, Object base) {
          return delegate.getCommonPropertyType(context, base);
      }
  
      @Override
      public Iterator<FeatureDescriptor> getFeatureDescriptors(ELContext context, Object base) {
          return delegate.getFeatureDescriptors(context, base);
      }
  
      @Override
      public Class<?> getType(ELContext context, Object base, Object property) {
          return delegate.getType(context, base, property);
      }
  
      @Override
      public Object getValue(ELContext context, Object base, Object property) {
          return delegate.getValue(context, base, property);
      }
  
      @Override
      public boolean isReadOnly(ELContext context, Object base, Object property) {
          return delegate.isReadOnly(context, base, property);
      }
  
      @Override
      public void setValue(ELContext context, Object base, Object property, Object value) {
          delegate.setValue(context, base, property, value);
      }
  
      @Override
      public Object invoke(ELContext context, Object base, Object method, Class<?>[] paramTypes, Object[] params) {
          return delegate.invoke(context, base, method, paramTypes, params);
      }
  }
  