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The AWS Java Mobile SDK for Amazon S3 module holds the client classes that are used for communicating with Amazon Simple Storage Service
/*
* Copyright 2010-2018 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;
}
}
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