/**
* Copyright 2010 Google Inc.
*
* 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.waveprotocol.wave.client.util;
/**
* Interface for classes that provide typed getters.
*
*/
public interface TypedSource {
/**
* Returns a <code>Boolean</code> corresponding to the key.
*
* @return <code>Boolean</code>, on error returns <code>null</code>.
*/
public Boolean getBoolean(String key);
/**
* Returns an <code>Integer</code> corresponding to the key.
*
* @return <code>Integer</code>, on error returns <code>null</code>.
*/
public Integer getInteger(String key);
/**
* Returns a <code>Double</code> corresponding to the key.
*
* @return <code>Double</code>, on error returns <code>null</code>.
*/
public Double getDouble(String key);
/**
* Returns a <code>String</code> corresponding to the key.
*
* @return <code>String</code>, on error returns <code>null</code>.
*/
public String getString(String key);
}