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Amazon Web Services SDK for Android
/*
* 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.services.s3.model;
import com.amazonaws.AmazonWebServiceRequest;
import com.amazonaws.services.s3.AmazonS3Client;
/**
*
* Contains options to return a list of summary information about the objects in the specified
* bucket. Depending on the request parameters, additional information is returned,
* such as common prefixes if a delimiter was specified. List
* results are always returned in lexicographic (alphabetical) order.
*
*
* Buckets can contain a virtually unlimited number of keys, and the complete
* results of a list query can be extremely large. To manage large result sets,
* Amazon S3 uses pagination to split them into multiple responses.
* Always check the {@link ObjectListing#isTruncated()} method to see
* if the returned listing is complete, or if callers need to make additional
* calls to get more results. Alternatively, use the
* {@link AmazonS3Client#listNextBatchOfObjects(ObjectListing)} method as an
* easy way to get the next page of object listings.
*
*
* Calling {@link ListObjectsRequest#setDelimiter(String)}
* sets the delimiter, allowing groups of keys that share the
* delimiter-terminated prefix to be included
* in the returned listing. This allows applications to organize and browse
* their keys hierarchically, similar to how a file system organizes files
* into directories. These common prefixes can be retrieved
* through the {@link ObjectListing#getCommonPrefixes()} method.
*
*
* For example, consider a bucket that contains the following keys:
*
* - "foo/bar/baz"
* - "foo/bar/bash"
* - "foo/bar/bang"
* - "foo/boo"
*
* If calling listObjects with
* a prefix value of "foo/" and a delimiter value of "/"
* on this bucket, an ObjectListing is returned that contains one key
* ("foo/boo") and one entry in the common prefixes list ("foo/bar/").
* To see deeper into the virtual hierarchy, make another
* call to listObjects setting the prefix parameter to any interesting
* common prefix to list the individual keys under that prefix.
*
*
* The total number of keys in a bucket doesn't substantially affect list performance,
* nor does the presence or absence of additional request parameters.
*
*/
public class ListObjectsRequest extends AmazonWebServiceRequest {
/** The name of the Amazon S3 bucket to list. */
private String bucketName;
/**
* Optional parameter restricting the response to keys which begin with the
* specified prefix. You can use prefixes to separate a bucket into
* different sets of keys in a way similar to how a file system uses
* folders.
*/
private String prefix;
/**
* Optional parameter indicating where in the bucket to begin listing. The
* list will only include keys that occur lexicographically after the
* marker. This enables pagination; to get the next page of results use the
* current value from {@link ObjectListing#getNextMarker()} as the marker
* for the next request to list objects.
*/
private String marker;
/**
* Optional parameter that causes keys that contain the same string between
* the prefix and the first occurrence of the delimiter to be rolled up into
* a single result element in the
* {@link ObjectListing#getCommonPrefixes()} list. These rolled-up keys
* are not returned elsewhere in the response. The most commonly used
* delimiter is "/", which simulates a hierarchical organization similar to
* a file system directory structure.
*/
private String delimiter;
/**
* Optional parameter indicating the maximum number of keys to include in
* the response. Amazon S3 might return fewer than this, but will not return
* more. Even if maxKeys is not specified, Amazon S3 will limit the number
* of results in the response.
*/
private Integer maxKeys;
/**
* Optional parameter indicating the encoding method to be applied on the
* response. An object key can contain any Unicode character; however, XML
* 1.0 parser cannot parse some characters, such as characters with an ASCII
* value from 0 to 10. For characters that are not supported in XML 1.0, you
* can add this parameter to request that Amazon S3 encode the keys in the
* response.
*/
private String encodingType;
/**
* Constructs a new {@link ListObjectsRequest} object.
* The caller must populate
* the object fields before the request is ready to be executed.
*
* @see ListObjectsRequest#ListObjectsRequest(String, String, String, String, Integer)
*/
public ListObjectsRequest() {}
/**
* Constructs a new {@link ListObjectsRequest} object and
* initializes all required and optional object fields.
*
* @param bucketName
* The name of the bucket whose objects are to be listed.
* @param prefix
* The prefix restricting what keys will be listed.
* @param marker
* The key marker indicating where listing results should begin.
* @param delimiter
* The delimiter for condensing common prefixes in the returned
* listing results.
* @param maxKeys
* The maximum number of results to return.
*
* @see ListObjectsRequest#ListObjectsRequest()
*/
public ListObjectsRequest(String bucketName, String prefix, String marker, String delimiter, Integer maxKeys) {
setBucketName(bucketName);
setPrefix(prefix);
setMarker(marker);
setDelimiter(delimiter);
setMaxKeys(maxKeys);
}
/**
* Gets the name of the Amazon S3 bucket whose
* objects are to be listed.
*
* @return The name of the Amazon S3 bucket whose objects are to be listed.
*
* @see ListObjectsRequest#setBucketName(String)
* @see ListObjectsRequest#withBucketName(String)
*/
public String getBucketName() {
return bucketName;
}
/**
* Sets the name of the Amazon S3 bucket whose objects are to be listed.
*
* @param bucketName
* The name of the Amazon S3 bucket whose objects are to be
* listed.
*
* @see ListObjectsRequest#getBucketName()
* @see ListObjectsRequest#withBucketName(String)
*/
public void setBucketName(String bucketName) {
this.bucketName = bucketName;
}
/**
* Sets the name of the Amazon S3 bucket whose objects are to be listed.
* Returns this {@link ListObjectsRequest}, enabling additional method
* calls to be chained together.
*
* @param bucketName
* The name of the Amazon S3 bucket whose objects are to be
* listed.
*
* @return This {@link ListObjectsRequest}, enabling additional method
* calls to be chained together.
*
* @see ListObjectsRequest#getBucketName()
* @see ListObjectsRequest#setBucketName(String)
*/
public ListObjectsRequest withBucketName(String bucketName) {
setBucketName(bucketName);
return this;
}
/**
* Gets the optional prefix parameter and restricts the response to keys
* that begin with the specified prefix. Use prefixes to separate a
* bucket into different sets of keys, similar to how a file system organizes files
* into directories.
*
* @return The optional prefix parameter restricting the response to keys
* that begin with the specified prefix.
*
* @see ListObjectsRequest#setPrefix(String)
*/
public String getPrefix() {
return prefix;
}
/**
* Sets the optional prefix parameter, restricting the response to keys that
* begin with the specified prefix.
*
* @param prefix
* The optional prefix parameter, restricting the response to keys
* that begin with the specified prefix.
*
* @see ListObjectsRequest#getPrefix()
*/
public void setPrefix(String prefix) {
this.prefix = prefix;
}
/**
* Sets the optional prefix parameter restricting the response to keys that
* begin with the specified prefix.
* Returns this {@link ListObjectsRequest}, enabling additional method
* calls to be chained together.
*
* @param prefix
* The optional prefix parameter restricting the response to keys
* that begin with the specified prefix.
*
* @return This {@link ListObjectsRequest}, enabling additional method
* calls to be chained together.
*
* @see ListObjectsRequest#getPrefix()
* @see ListObjectsRequest#setPrefix(String)
*/
public ListObjectsRequest withPrefix(String prefix) {
setPrefix(prefix);
return this;
}
/**
* Gets the optional marker parameter indicating where in the bucket to begin
* listing. The list will only include keys that occur lexicographically
* after the marker.
*
* @return The optional marker parameter indicating where in the bucket to begin
* listing. The list will only include keys that occur
* lexicographically after the marker.
*
* @see ListObjectsRequest#setMarker(String)
* @see ListObjectsRequest#withMarker(String)
*/
public String getMarker() {
return marker;
}
/**
* Sets the optional marker parameter indicating where in the bucket to begin
* listing. The list will only include keys that occur lexicographically
* after the marker.
*
* @param marker
* The optional marker parameter indicating where in the bucket to begin
* listing. The list will only include keys that occur
* lexicographically after the marker.
*
* @see ListObjectsRequest#getMarker()
* @see ListObjectsRequest#withMarker(String)
*/
public void setMarker(String marker) {
this.marker = marker;
}
/**
* Sets the optional marker parameter indicating where in the bucket to begin
* listing.
* Returns this {@link ListObjectsRequest}, enabling additional method
* calls to be chained together.
* The list will only include keys that occur lexicographically
* after the marker.
*
* @param marker
* The optional parameter indicating where in the bucket to begin
* listing. The list will only include keys that occur
* lexicographically after the marker.
*
* @return This {@link ListObjectsRequest}, enabling additional method
* calls to be chained together.
*
* @see ListObjectsRequest#getMarker()
* @see ListObjectsRequest#setMarker(String)
*/
public ListObjectsRequest withMarker(String marker) {
setMarker(marker);
return this;
}
/**
* Gets the optional delimiter parameter that causes keys that contain
* the same string between the prefix and the first occurrence of the
* delimiter to be combined into a single result element in the
* {@link ObjectListing#getCommonPrefixes()} list. These combined keys
* are not returned elsewhere in the response. The most commonly used
* delimiter is "/", which simulates a hierarchical organization similar to
* a file system directory structure.
*
* @return The optional delimiter parameter that causes keys that contain
* the same string between the prefix and the first occurrence of
* the delimiter to be combined into a single result element in the
* {@link ObjectListing#getCommonPrefixes()} list.
*
* @see ListObjectsRequest#setDelimiter(String)
* @see ListObjectsRequest#withDelimiter(String)
*/
public String getDelimiter() {
return delimiter;
}
/**
* Sets the optional delimiter parameter that causes keys that contain the
* same string between the prefix and the first occurrence of the delimiter
* to be combined into a single result element in the
* {@link ObjectListing#getCommonPrefixes()} list.
*
* @param delimiter
* The optional delimiter parameter that causes keys that contain
* the same string between the prefix and the first occurrence of
* the delimiter to be combined into a single result element in
* the {@link ObjectListing#getCommonPrefixes()} list.
*
* @see ListObjectsRequest#getDelimiter()
* @see ListObjectsRequest#withDelimiter(String)
*/
public void setDelimiter(String delimiter) {
this.delimiter = delimiter;
}
/**
* Sets the optional delimiter parameter that causes keys that contain the
* same string between the prefix and the first occurrence of the delimiter
* to be rolled up into a single result element in the
* {@link ObjectListing#getCommonPrefixes()} list.
* Returns this {@link ListObjectsRequest}, enabling additional method
* calls to be chained together.
*
* @param delimiter
* The optional delimiter parameter that causes keys that contain
* the same string between the prefix and the first occurrence of
* the delimiter to be rolled up into a single result element in
* the {@link ObjectListing#getCommonPrefixes()} list.
*
* @return This {@link ListObjectsRequest}, enabling additional method
* calls to be chained together.
*
* @see ListObjectsRequest#getDelimiter()
* @see ListObjectsRequest#setDelimiter(String)
*/
public ListObjectsRequest withDelimiter(String delimiter) {
setDelimiter(delimiter);
return this;
}
/**
* Gets the optional maxKeys parameter indicating the maximum number of keys to
* include in the response. Amazon S3 might return fewer keys than specified, but will
* never return more. Even if the optional parameter is not specified,
* Amazon S3 will limit the number of results in the response.
*
* @return The optional parameter indicating the maximum number of keys to
* include in the response.
*
* @see ListObjectsRequest#setMaxKeys(Integer)
* @see ListObjectsRequest#withMaxKeys(Integer)
*/
public Integer getMaxKeys() {
return maxKeys;
}
/**
* Sets the optional maxKeys parameter indicating the maximum number of keys to
* include in the response.
*
* @param maxKeys
* The optional parameter indicating the maximum number of keys
* to include in the response.
*
* @see ListObjectsRequest#getMaxKeys()
* @see ListObjectsRequest#withMaxKeys(Integer)
*/
public void setMaxKeys(Integer maxKeys) {
this.maxKeys = maxKeys;
}
/**
* Sets the optional maxKeys parameter indicating the maximum number of keys to
* include in the response.
* Returns this {@link ListObjectsRequest}, enabling additional method
* calls to be chained together.
*
* @param maxKeys
* The optional parameter indicating the maximum number of keys
* to include in the response.
*
* @return This {@link ListObjectsRequest}, enabling additional method
* calls to be chained together.
*
* @see ListObjectsRequest#getMaxKeys()
* @see ListObjectsRequest#setMaxKeys(Integer)
*/
public ListObjectsRequest withMaxKeys(Integer maxKeys) {
setMaxKeys(maxKeys);
return this;
}
/**
* Gets the optional encodingType parameter indicating the
* encoding method to be applied on the response.
*
* @return The encoding method to be applied on the response.
*/
public String getEncodingType() {
return encodingType;
}
/**
* Sets the optional encodingType parameter indicating the
* encoding method to be applied on the response. An object key can contain
* any Unicode character; however, XML 1.0 parser cannot parse some
* characters, such as characters with an ASCII value from 0 to 10. For
* characters that are not supported in XML 1.0, you can add this parameter
* to request that Amazon S3 encode the keys in the response.
*
* @param encodingType
* The encoding method to be applied on the response. Valid
* values: null (not encoded) or "url".
*/
public void setEncodingType(String encodingType) {
this.encodingType = encodingType;
}
/**
* Sets the optional encodingType parameter indicating the
* encoding method to be applied on the response. An object key can contain
* any Unicode character; however, XML 1.0 parser cannot parse some
* characters, such as characters with an ASCII value from 0 to 10. For
* characters that are not supported in XML 1.0, you can add this parameter
* to request that Amazon S3 encode the keys in the response.
* Returns this {@link ListObjectsRequest}, enabling additional method calls
* to be chained together.
*
* @param encodingType
* The encoding method to be applied on the response. Valid
* values: null (not encoded) or "url".
*/
public ListObjectsRequest withEncodingType(String encodingType) {
setEncodingType(encodingType);
return this;
}
}