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/*
* Copyright 2010-2014 Amazon.com, Inc. or its affiliates. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License").
* You may not use this file except in compliance with the License.
* A copy of the License is located at
*
* http://aws.amazon.com/apache2.0
*
* or in the "license" file accompanying this file. This file 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 com.amazonaws.auth.policy;
import java.util.Arrays;
import java.util.List;
import com.amazonaws.auth.policy.conditions.ConditionFactory;
import com.amazonaws.auth.policy.conditions.NumericCondition;
import com.amazonaws.auth.policy.conditions.NumericCondition.NumericComparisonType;
/**
* AWS access control policy conditions are contained in {@link Statement}
* objects, and affect when a statement is applied. For example, a statement
* that allows access to an Amazon SQS queue could use a condition to only apply
* the effect of that statement for requests that are made before a certain
* date, or that originate from a range of IP addresses.
*
* Multiple conditions can be included in a single statement, and all conditions
* must evaluate to true in order for the statement to take effect.
*
* The set of conditions is D in the statement
* "A has permission to do B to C where D applies."
*
* A condition is composed of three parts:
*
* - Condition Key - The condition key declares which value of a
* request to pull in and compare against when a policy is evaluated by AWS. For
* example, using {@link ConditionFactory#SOURCE_IP_CONDITION_KEY} will cause
* AWS to pull in the current request's source IP as the first value to compare
* against every time your policy is evaluated.
*
- Comparison Type - Most condition types allow several ways to
* compare the value obtained from the condition key and the comparison value.
* For example, the {@link NumericComparisonType} enumerates the ways a
* {@link NumericCondition} can be evaluated (less than, greater than, equals,
* etc).
*
- Comparison Value - This is a static value used as the second value
* in the comparison when your policy is evaluated. Depending on the comparison
* type, this value can optionally use wildcards. See the documentation for
* individual comparison types for more information.
*
*
* There are many expressive conditions available in the
* com.amazonaws.auth.policy.conditions package to use in access
* control policy statements.
*
* This class is not intended to be directly subclassed by users, instead users
* should use the many available conditions and condition factories in the
* com.amazonaws.auth.policy.conditions package.
*/
public class Condition {
protected String type;
protected String conditionKey;
protected List values;
/**
* Returns the type of this condition.
*
* @return The type of this condition.
*/
public String getType() {
return type;
}
/**
* Sets the type of this condition.
*
* @param type
* The type of this condition.
*/
public void setType(String type) {
this.type = type;
}
/**
* Returns the name of the condition key involved in this condition.
* Condition keys are predefined values supported by AWS that provide input
* to a condition's evaluation, such as the current time, or the IP address
* of the incoming request.
*
* Your policy is evaluated for each incoming request, and condition keys
* specify what information to pull out of those incoming requests and plug
* into the conditions in your policy.
*
* @return The name of the condition key involved in this condition.
*/
public String getConditionKey() {
return conditionKey;
}
/**
* Sets the name of the condition key involved in this condition.
* Condition keys are predefined values supported by AWS that provide
* input to a condition's evaluation, such as the current time, or the IP
* address of the incoming request.
*
* Your policy is evaluated for each incoming request, and condition keys
* specify what information to pull out of those incoming requests and plug
* into the conditions in your policy.
*
* @param conditionKey
* The name of the condition key involved in this condition.
*/
public void setConditionKey(String conditionKey) {
this.conditionKey = conditionKey;
}
/**
* Returns the values specified for this access control policy condition.
* For example, in a condition that compares the incoming IP address of a
* request to a specified range of IP addresses, the range of IP addresses
* is the single value in the condition.
*
* Most conditions accept only one value, but multiple values are possible.
*
* @return The values specified for this access control policy condition.
*/
public List getValues() {
return values;
}
/**
* Sets the values specified for this access control policy condition. For
* example, in a condition that compares the incoming IP address of a
* request to a specified range of IP addresses, the range of IP addresses
* is the single value in the condition.
*
* Most conditions accept only one value, but multiple values are possible.
*
* @param values
* The values specified for this access control policy condition.
*/
public void setValues(List values) {
this.values = values;
}
/**
* Fluent version of {@link Condition#setType(String)}
* @return this
*/
public Condition withType(String type) {
setType(type);
return this;
}
/**
* Fluent version of {@link Condition#setConditionKey(String)}
* @return this
*/
public Condition withConditionKey(String key) {
setConditionKey(key);
return this;
}
/**
* Fluent version of {@link Condition#setValues(List)}
* @return this
*/
public Condition withValues(String... values) {
setValues(Arrays.asList(values));
return this;
}
/**
* Fluent version of {@link Condition#setValues(List)}
* @return this
*/
public Condition withValues(List values) {
setValues(values);
return this;
}
}