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106 lines
3.5 KiB
Java
106 lines
3.5 KiB
Java
/*
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* ====================================================================
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing,
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* software distributed under the License is distributed on an
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* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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* KIND, either express or implied. See the License for the
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* specific language governing permissions and limitations
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* under the License.
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* ====================================================================
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*
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* This software consists of voluntary contributions made by many
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* individuals on behalf of the Apache Software Foundation. For more
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* information on the Apache Software Foundation, please see
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* <http://www.apache.org/>.
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*
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*/
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package ch.boye.httpclientandroidlib.params;
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/**
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* {@link HttpParams} implementation that delegates resolution of a parameter
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* to the given default {@link HttpParams} instance if the parameter is not
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* present in the local one. The state of the local collection can be mutated,
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* whereas the default collection is treated as read-only.
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*
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* @since 4.0
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*/
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public final class DefaultedHttpParams extends AbstractHttpParams {
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private final HttpParams local;
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private final HttpParams defaults;
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/**
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* Create the defaulted set of HttpParams.
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*
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* @param local the mutable set of HttpParams
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* @param defaults the default set of HttpParams, not mutated by this class
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*/
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public DefaultedHttpParams(final HttpParams local, final HttpParams defaults) {
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super();
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if (local == null) {
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throw new IllegalArgumentException("HTTP parameters may not be null");
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}
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this.local = local;
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this.defaults = defaults;
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}
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/**
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* Creates a copy of the local collection with the same default
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*
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* @deprecated
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*/
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public HttpParams copy() {
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HttpParams clone = this.local.copy();
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return new DefaultedHttpParams(clone, this.defaults);
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}
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/**
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* Retrieves the value of the parameter from the local collection and, if the
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* parameter is not set locally, delegates its resolution to the default
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* collection.
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*/
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public Object getParameter(final String name) {
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Object obj = this.local.getParameter(name);
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if (obj == null && this.defaults != null) {
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obj = this.defaults.getParameter(name);
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}
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return obj;
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}
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/**
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* Attempts to remove the parameter from the local collection. This method
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* <i>does not</i> modify the default collection.
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*/
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public boolean removeParameter(final String name) {
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return this.local.removeParameter(name);
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}
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/**
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* Sets the parameter in the local collection. This method <i>does not</i>
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* modify the default collection.
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*/
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public HttpParams setParameter(final String name, final Object value) {
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return this.local.setParameter(name, value);
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}
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/**
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*
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* @return the default HttpParams collection
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*/
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public HttpParams getDefaults() {
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return this.defaults;
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}
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}
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