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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.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*
*/
package ch.boye.httpclientandroidlib.params;
import java.util.HashSet;
import java.util.Set;
import ch.boye.httpclientandroidlib.util.Args;
/**
* {@link HttpParams} implementation that delegates resolution of a parameter
* to the given default {@link HttpParams} instance if the parameter is not
* present in the local one. The state of the local collection can be mutated,
* whereas the default collection is treated as read-only.
*
* @since 4.0
*
* @deprecated (4.3) use configuration classes provided 'ch.boye.httpclientandroidlib.config'
* and 'ch.boye.httpclientandroidlib.client.config'
*/
@Deprecated
public final class DefaultedHttpParams extends AbstractHttpParams {
private final HttpParams local;
private final HttpParams defaults;
/**
* Create the defaulted set of HttpParams.
*
* @param local the mutable set of HttpParams
* @param defaults the default set of HttpParams, not mutated by this class
*/
public DefaultedHttpParams(final HttpParams local, final HttpParams defaults) {
super();
this.local = Args.notNull(local, "Local HTTP parameters");
this.defaults = defaults;
}
/**
* Creates a copy of the local collection with the same default
*/
public HttpParams copy() {
final HttpParams clone = this.local.copy();
return new DefaultedHttpParams(clone, this.defaults);
}
/**
* Retrieves the value of the parameter from the local collection and, if the
* parameter is not set locally, delegates its resolution to the default
* collection.
*/
public Object getParameter(final String name) {
Object obj = this.local.getParameter(name);
if (obj == null && this.defaults != null) {
obj = this.defaults.getParameter(name);
}
return obj;
}
/**
* Attempts to remove the parameter from the local collection. This method
* <i>does not</i> modify the default collection.
*/
public boolean removeParameter(final String name) {
return this.local.removeParameter(name);
}
/**
* Sets the parameter in the local collection. This method <i>does not</i>
* modify the default collection.
*/
public HttpParams setParameter(final String name, final Object value) {
return this.local.setParameter(name, value);
}
/**
*
* @return the default HttpParams collection
*/
public HttpParams getDefaults() {
return this.defaults;
}
/**
* Returns the current set of names
* from both the local and default HttpParams instances.
*
* Changes to the underlying HttpParams intances are not reflected
* in the set - it is a snapshot.
*
* @return the combined set of names, as a Set<String>
* @since 4.2
* @throws UnsupportedOperationException if either the local or default HttpParams instances do not implement HttpParamsNames
*/
@Override
public Set<String> getNames() {
final Set<String> combined = new HashSet<String>(getNames(defaults));
combined.addAll(getNames(this.local));
return combined ;
}
/**
* Returns the current set of defaults names.
*
* Changes to the underlying HttpParams are not reflected
* in the set - it is a snapshot.
*
* @return the names, as a Set<String>
* @since 4.2
* @throws UnsupportedOperationException if the default HttpParams instance does not implement HttpParamsNames
*/
public Set<String> getDefaultNames() {
return new HashSet<String>(getNames(this.defaults));
}
/**
* Returns the current set of local names.
*
* Changes to the underlying HttpParams are not reflected
* in the set - it is a snapshot.
*
* @return the names, as a Set<String>
* @since 4.2
* @throws UnsupportedOperationException if the local HttpParams instance does not implement HttpParamsNames
*/
public Set<String> getLocalNames() {
return new HashSet<String>(getNames(this.local));
}
// Helper method
private Set<String> getNames(final HttpParams params) {
if (params instanceof HttpParamsNames) {
return ((HttpParamsNames) params).getNames();
}
throw new UnsupportedOperationException("HttpParams instance does not implement HttpParamsNames");
}
}
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