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Quellcode-Bibliothek© Kompilation durch diese Firma[Weder Korrektheit noch Funktionsfähigkeit der Software werden zugesichert.]Datei: EmacsUtil.bsh Sprache: JAVAUntersuchung Apache© |
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/*
* Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. * The ASF licenses this file to You 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 jakarta.el; import java.util.Iterator; /** * @author Jacob Hookom [jacob/hookom.net] */ public abstract class ELResolver { public static final String TYPE = "type"; public static final String RESOLVABLE_AT_DESIGN_TIME = "resolvableAtDesignTime"; /** * Obtain the value of the given property on the given object using the given context. * * @param context The EL context for this evaluation * @param base The base object on which the property is to be found * @param property The property whose value is to be returned * * @return the value of the provided property * * @throws NullPointerException If the supplied context is <code>null</code> * @throws PropertyNotFoundException If the base/property combination provided to the resol * resolver can handle but no match was found or a match was found but was not * readable * @throws ELException Wraps any exception throw whilst resolving the property */ public abstract Object getValue(ELContext context, Object base, Object property); /** * Invokes a method on the the given object. This default implementation always returns <code>nul * * @param context The EL context for this evaluation * @param base The base object on which the method is to be found * @param method The method to invoke * @param paramTypes The types of the parameters of the method to invoke * @param params The parameters with which to invoke the method * * @return Always <code>null</code> * * @since EL 2.2 */ public Object invoke(ELContext context, Object base, Object method, Class<?>[] paramTypes, O return null; } /** * Obtain the most generally acceptable type that may be used to set the given property on the give * the given context. * * @param context The EL context for this evaluation * @param base The base object on which the property is to be found * @param property The property whose type is to be returned * * @return the most general type that maybe used to set the provided property or {@code null} if th * read-only. * * @throws NullPointerException If the supplied context is <code>null</code> * @throws PropertyNotFoundException If the base/property combination provided to the resol * resolver can handle but no match was found or a match was found but was not * readable * @throws ELException Wraps any exception throw whilst resolving the property */ public abstract Class<?> getType(ELContext context, Object base, Object property); /** * Set the value of the given property on the given object using the given context. * * @param context The EL context for this evaluation * @param base The base object on which the property is to be found * @param property The property whose value is to be set * @param value The value to set the property to * * @throws NullPointerException If the supplied context is <code>null</code> * @throws PropertyNotFoundException If the base/property combination provided to the resol * resolver can handle but no match was found * @throws PropertyNotWritableException If the base/property combination provided to the re * resolver can handle but the property was not writable * @throws ELException Wraps any exception throw whilst resolving the property */ public abstract void setValue(ELContext context, Object base, Object property, Object valu /** * Determine if the given property on the given object is read-only using the given context. * * @param context The EL context for this evaluation * @param base The base object on which the property is to be found * @param property The property to be checked for read only status * * @return <code>true</code> if the identified property is read only, otherwise <code>false</code> * * @throws NullPointerException If the supplied context is <code>null</code> * @throws PropertyNotFoundException If the base/property combination provided to the resol * resolver can handle but no match was found * @throws ELException Wraps any exception throw whilst resolving the property */ public abstract boolean isReadOnly(ELContext context, Object base, Object property); /** * Obtain the feature descriptors for the resolvable properties of the given object. * <p> * The default implementation returns {@code null}. * * @param context The context in which the examination takes place * @param base The object to examine * * @return An iterator, possibly empty, of feature descriptors of the given object * * @deprecated This method will be removed, without replacement, in EL 6.0 / Tomcat 11. */ @Deprecated(forRemoval = true, since = "EL 5.0") public Iterator<java.beans.FeatureDescriptor> getFeatureDescriptors(ELContext context return null; } /** * Obtain the most common type that is acceptable for the given base object. * * @param context The context in which the examination takes place * @param base The object to examine * * @return {code null} if the most common type cannot be determine, otherwise the most common typ */ public abstract Class<?> getCommonPropertyType(ELContext context, Object base); /** * Converts the given object to the given type. This default implementation always returns <code> * * @param <T> The type to which the object should be converted * @param context The EL context for this evaluation * @param obj The object to convert * @param type The type to which the object should be converted * * @return Always <code>null</code> * * @since EL 3.0 */ public <T> T convertToType(ELContext context, Object obj, Class<T> type) { context.setPropertyResolved(false); return null; } } ¤ Diese beiden folgenden Angebotsgruppen bietet das Unternehmen0.106Angebot Wie Sie bei der Firma Beratungs- und Dienstleistungen beauftragen können ¤ |
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