/*
* Copyright 2010 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 java.util.ArrayList;
import java.util.Date;
import java.util.List;
import com.amazonaws.AmazonWebServiceRequest;
import com.amazonaws.services.s3.AmazonS3;
import com.amazonaws.services.s3.internal.Constants;
/**
* <p>
* Provides options for downloading an Amazon S3 object.
* </p>
* <p>
* All <code>GetObjectRequests</code> must specify a bucket name and key.
* Beyond that, requests can also specify:
*
* <ul>
* <li>The range of bytes within the object to download,
* <li>Constraints controlling if the object will be downloaded or not.
* </ul>
* </p>
*
* @see GetObjectRequest#GetObjectRequest(String, String)
* @see GetObjectRequest#GetObjectRequest(String, String, String)
* @see GetObjectMetadataRequest
*/
public class GetObjectRequest extends AmazonWebServiceRequest {
/** The name of the bucket containing the object to retrieve */
private String bucketName;
/** The key under which the desired object is stored */
private String key;
/**
* Optional version ID specifying which version of the object to download.
* If not specified, the most recent version will be downloaded.
* <p>
* For more information about enabling versioning for a bucket, see
* {@link AmazonS3#setBucketVersioningConfiguration(SetBucketVersioningConfigurationRequest)}.
*/
private String versionId;
/** Optional member indicating the byte range of data to retrieve */
private long[] range;
/**
* Optional list of ETag values that constrain this request to only be
* executed if the object's ETag matches one of the specified ETag values.
*/
private List<String> matchingETagConstraints = new ArrayList<String>();
/**
* Optional list of ETag values that constrain this request to only be
* executed if the object's ETag does not match any of the specified ETag
* constraint values.
*/
private List<String> nonmatchingEtagConstraints = new ArrayList<String>();
/**
* Optional field that constrains this request to only be executed if the
* object has not been modified since the specified date.
*/
private Date unmodifiedSinceConstraint;
/**
* Optional field that constrains this request to only be executed if the
* object has been modified since the specified date.
*/
private Date modifiedSinceConstraint;
/**
* Constructs a new {@link GetObjectRequest} with all the required parameters.
*
* @param bucketName
* The name of the bucket containing the desired object.
* @param key
* The key in the specified bucket under which the object is
* stored.
*
* @see GetObjectRequest#GetObjectRequest(String, String, String)
*/
public GetObjectRequest(String bucketName, String key) {
this(bucketName, key, null);
}
/**
* Constructs a new {@link GetObjectRequest} with all the required parameters.
*
* @param bucketName
* The name of the bucket containing the desired object.
* @param key
* The key in the specified bucket under which the object is
* stored.
* @param versionId
* The Amazon S3 version ID specifying a specific version of the
* object to download.
*
* @see GetObjectRequest#GetObjectRequest(String, String)
*/
public GetObjectRequest(String bucketName, String key, String versionId) {
setBucketName(bucketName);
setKey(key);
setVersionId(versionId);
}
/**
* Gets the name of the bucket containing the object to be downloaded.
*
* @return The name of the bucket containing the object to be downloaded.
*
* @see GetObjectRequest#setBucketName(String)
* @see GetObjectRequest#withBucketName(String)
*/
public String getBucketName() {
return bucketName;
}
/**
* Sets the name of the bucket containing the object to be downloaded.
*
* @param bucketName
* The name of the bucket containing the object to be downloaded.
*
* @see GetObjectRequest#getBucketName()
* @see GetObjectRequest#withBucketName(String)
*/
public void setBucketName(String bucketName) {
this.bucketName = bucketName;
}
/**
* Sets the name of the bucket containing the object to be downloaded.
* Returns this {@link GetObjectRequest}, enabling additional method
* calls to be chained together.
*
* @param bucketName
* The name of the bucket containing the object to be downloaded.
*
* @return This {@link GetObjectRequest}, enabling additional method
* calls to be chained together.
*
* @see GetObjectRequest#getBucketName()
* @see GetObjectRequest#setBucketName(String)
*/
public GetObjectRequest withBucketName(String bucketName) {
setBucketName(bucketName);
return this;
}
/**
* Gets the key under which the object to be downloaded is stored.
*
* @return The key under which the object to be downloaded is stored.
*
* @see GetObjectRequest#setKey(String)
* @see GetObjectRequest#withKey(String)
*/
public String getKey() {
return key;
}
/**
* Sets the key under which the object to be downloaded is stored.
*
* @param key
* The key under which the object to be downloaded is stored.
*
* @see GetObjectRequest#getKey()
* @see GetObjectRequest#withKey(String)
*/
public void setKey(String key) {
this.key = key;
}
/**
* Sets the key under which the object to be downloaded is stored.
* Returns this {@link GetObjectRequest}, enabling additional method
* calls to be chained together.
*
* @param key
* The key under which the object to be downloaded is stored.
*
* @return This {@link GetObjectRequest}, enabling additional method
* calls to be chained together.
*
* @see GetObjectRequest#getKey()
* @see GetObjectRequest#setKey(String)
*/
public GetObjectRequest withKey(String key) {
setKey(key);
return this;
}
/**
* <p>
* Gets the optional version ID specifying which version of the object to
* download. If not specified, the most recent version will be downloaded.
* </p>
* <p>
* Objects created before versioning was enabled or when versioning is
* suspended are given the default <code>null</code> version ID (see
* {@link Constants#NULL_VERSION_ID}). Note that the
* <code>null</code> version ID is a valid version ID and is not the
* same as not having a version ID.
* </p>
* <p>
* For more information about enabling versioning for a bucket, see
* {@link AmazonS3#setBucketVersioningConfiguration(SetBucketVersioningConfigurationRequest)}.
* </p>
*
* @return The optional version ID specifying which version of the object to
* download. If not specified, the most recent version will be
* downloaded.
*
* @see GetObjectRequest#setVersionId(String)
* @see GetObjectRequest#withVersionId(String)
*/
public String getVersionId() {
return versionId;
}
/**
* Sets the optional version ID specifying which version of the object to
* download. If not specified, the most recent version will be downloaded.
* <p>
* Objects created before versioning was enabled or when versioning is
* suspended will be given the default <code>null</code> version ID (see
* {@link Constants#NULL_VERSION_ID}). Note that the
* <code>null</code> version ID is a valid version ID and is not the
* same as not having a version ID.
* </p>
* <p>
* For more information about enabling versioning for a bucket, see
* {@link AmazonS3#setBucketVersioningConfiguration(SetBucketVersioningConfigurationRequest)}.
* </p>
*
* @param versionId
* The optional version ID specifying which version of the object
* to download.
*
* @see GetObjectRequest#getVersionId()
* @see GetObjectRequest#withVersionId(String)
*/
public void setVersionId(String versionId) {
this.versionId = versionId;
}
/**
* <p>
* Sets the optional version ID specifying which version of the object to
* download and returns this object, enabling additional method calls to be
* chained together. If not specified, the most recent version will be
* downloaded.
* </p>
* <p>
* Objects created before versioning was enabled or when versioning is
* suspended will be given the default or <code>null</code> version ID (see
* {@link Constants#NULL_VERSION_ID}). Note that the
* <code>null</code> version ID is a valid version ID and is not the
* same as not having a version ID.
* </p>
* <p>
* For more information about enabling versioning for a bucket, see
* {@link AmazonS3#setBucketVersioningConfiguration(SetBucketVersioningConfigurationRequest)}.
* </p>
*
* @param versionId
* The optional version ID specifying which version of the object
* to download.
*
* @return The updated request object, enabling additional method calls to be
* chained together.
*
* @see GetObjectRequest#getVersionId()
* @see GetObjectRequest#setVersionId(String)
*/
public GetObjectRequest withVersionId(String versionId) {
setVersionId(versionId);
return this;
}
/*
* Optional Request Parameters
*/
/**
* <p>
* Gets the optional inclusive byte range within the desired object
* that will be downloaded by this request.
* </p>
* <p>
* The range is returned as
* a two element array, containing the start and end index of the byte range.
* If no byte range has been specified, the entire object is downloaded and
* this method returns <code>null</code>.
* </p>
* @return A two element array indicating the inclusive start index and end index
* within the object being downloaded by this request.
* Returns <code>null</code> if no range has been specified,
* and the whole object is
* to be downloaded.
*
* @see GetObjectMetadataRequest#setRange(long, long)
* @see GetObjectRequest#withRange(long, long)
*/
public long[] getRange() {
return range;
}
/**
* <p>
* Sets the optional inclusive byte range within the desired object that
* will be downloaded by this request.
* </p>
* <p>
* The first byte in an object has
* position 0; as an example, the first ten bytes of an object can be
* downloaded by specifying a range of 0 to 9.
* </p>
* <p>
* If no byte range is specified, this request downloads the entire
* object from Amazon S3.
* </p>
*
* @param start
* The start of the inclusive byte range to download.
* @param end
* The end of the inclusive byte range to download.
*
* @see GetObjectMetadataRequest#getRange()
* @see GetObjectRequest#withRange(long, long)
*/
public void setRange(long start, long end) {
range = new long[] {start, end};
}
/**
* <p>
* Sets the optional inclusive byte range within the desired object that
* will be downloaded by this request.
* Returns this {@link GetObjectRequest}, enabling additional method
* calls to be chained together.
* </p>
* <p>
* The first byte in an object has
* position 0; as an example, the first ten bytes of an object can be
* downloaded by specifying a range of 0 to 9.
* </p>
* <p>
* If no byte range is specified, this request downloads the entire
* object from Amazon S3.
* </p>
*
* @param start
* The start of the inclusive byte range to download.
* @param end
* The end of the inclusive byte range to download.
*
* @return This {@link GetObjectRequest}, enabling additional method
* calls to be chained together.
*
* @see GetObjectRequest#getRange()
* @see GetObjectRequest#setRange(long, long)
*/
public GetObjectRequest withRange(long start, long end) {
setRange(start, end);
return this;
}
/**
* Gets the optional list of ETag constraints that, when present, <b>must</b>
* include a match for the object's current ETag in order for this
* request to be executed. Only one ETag in the list needs to match for this
* request to be executed by Amazon S3.
*
* @return The optional list of ETag constraints that when present <b>must</b>
* include a match for the object's current ETag in order for this
* request to be executed.
*
* @see GetObjectRequest#setMatchingETagConstraints(List)
* @see GetObjectRequest#withMatchingETagConstraint(String)
*/
public List<String> getMatchingETagConstraints() {
return matchingETagConstraints;
}
/**
* Sets the optional list of ETag constraints that when present <b>must</b>
* include a match for the object's current ETag in order for this
* request to be executed. If none of the specified ETags match the object's
* current ETag, this request will not be executed. Only one ETag in the
* list needs to match for the request to be executed by Amazon S3.
*
* @param eTagList
* The optional list of ETag constraints that <b>must</b> include a
* match for the object's current ETag in order for this request
* to be executed.
*
* @see GetObjectRequest#getMatchingETagConstraints()
* @see GetObjectRequest#withMatchingETagConstraint(String)
*/
public void setMatchingETagConstraints(List<String> eTagList) {
this.matchingETagConstraints = eTagList;
}
/**
* Sets a single ETag constraint to this request.
* Returns this {@link GetObjectRequest}, enabling additional method
* calls to be chained together.
* <p>
* Multiple ETag constraints can be added to a request, but one must match the object's
* current ETag in order for this request to be executed. If none of the
* ETag constraints added to this request match the object's current ETag,
* this request will not be executed by Amazon S3.
* </p>
*
* @param eTag
* The matching ETag constraint to add to this request.
*
* @return This {@link GetObjectRequest}, enabling additional method
* calls to be chained together.
*
* @see GetObjectRequest#getMatchingETagConstraints()
* @see GetObjectRequest#setMatchingETagConstraints(List)
*/
public GetObjectRequest withMatchingETagConstraint(String eTag) {
this.matchingETagConstraints.add(eTag);
return this;
}
/**
* Gets the optional list of ETag constraints that when present, <b>must</b>
* not include a match for the object's current ETag in order for this
* request to be executed. If any entry in the non-matching ETag constraint
* list matches the object's current ETag, this request <b>will not</b> be
* executed by Amazon S3.
*
* @return The optional list of ETag constraints that when present, <b>must</b>
* not include a match for the object's current ETag in order
* for this request to be executed.
*
* @see GetObjectRequest#setNonmatchingETagConstraints(List)
* @see GetObjectRequest#withNonmatchingETagConstraint(String)
*/
public List<String> getNonmatchingETagConstraints() {
return nonmatchingEtagConstraints;
}
/**
* Sets the optional list of ETag constraints that when present <b>must</b>
* not include a match for the object's current ETag in order for this
* request to be executed. If any entry in the non-matching ETag constraint
* list matches the object's current ETag, this request <b>will not</b> be
* executed by Amazon S3.
*
* @param eTagList
* The list of ETag constraints that, when present, <b>must not</b>
* include a match for the object's current ETag in order for
* this request to be executed.
*
* @see GetObjectRequest#getNonmatchingETagConstraints()
* @see GetObjectRequest#withNonmatchingETagConstraint(String)
*/
public void setNonmatchingETagConstraints(List<String> eTagList) {
this.nonmatchingEtagConstraints = eTagList;
}
/**
* Sets a single ETag constraint to this request.
* Returns this {@link GetObjectRequest}, enabling additional method
* calls to be chained together.
* <p>
* Multiple ETag
* constraints can be added to a request, but all ETag constraints <b>must
* not</b> match the object's current ETag in order for this request to be
* executed. If any entry in the non-matching ETag constraint list matches
* the object's current ETag, this request <b>will not</b> be executed by
* Amazon S3.
* </p>
*
* @param eTag
* The non-matching ETag constraint to add to this request.
*
* @return This {@link GetObjectRequest}, enabling additional method
* calls to be chained together.
*
* @see GetObjectRequest#getNonmatchingETagConstraints()
* @see GetObjectRequest#setNonmatchingETagConstraints(List)
*/
public GetObjectRequest withNonmatchingETagConstraint(String eTag) {
this.nonmatchingEtagConstraints.add(eTag);
return this;
}
/**
* Gets the optional unmodified constraint that restricts this
* request to executing only if the object has <b>not</b> been
* modified after the specified date.
*
* @return The optional unmodified constraint that restricts this
* request to executing only if the object has <b>not</b>
* been modified after the specified date.
*
* @see GetObjectRequest#setUnmodifiedSinceConstraint(Date)
* @see GetObjectRequest#withUnmodifiedSinceConstraint(Date)
*/
public Date getUnmodifiedSinceConstraint() {
return unmodifiedSinceConstraint;
}
/**
* Sets the optional unmodified constraint that restricts this request
* to executing only if the object has <b>not</b> been modified after
* the specified date.
* <p>
* Note that Amazon S3 will ignore any dates occurring in the future.
*
* @param date
* The unmodified constraint that restricts this request to
* executing only if the object has <b>not</b> been
* modified after this date.
*
* @see GetObjectRequest#getUnmodifiedSinceConstraint()
* @see GetObjectRequest#withUnmodifiedSinceConstraint(Date)
*/
public void setUnmodifiedSinceConstraint(Date date) {
this.unmodifiedSinceConstraint = date;
}
/**
* Sets the optional unmodified constraint that restricts this request
* to executing only if the object has <b>not</b> been modified after
* the specified date.
* Returns this {@link GetObjectRequest}, enabling additional method
* calls to be chained together.
* <p>
* Note that Amazon S3 will ignore any dates occurring in the future.
*
* @param date
* The unmodified constraint that restricts this request to
* executing only if the object has <b>not</b> been
* modified after this date.
*
* @return This {@link GetObjectRequest}, enabling additional method
* calls to be chained together.
*
* @see GetObjectRequest#getUnmodifiedSinceConstraint()
* @see GetObjectRequest#setUnmodifiedSinceConstraint(Date)
*/
public GetObjectRequest withUnmodifiedSinceConstraint(Date date) {
setUnmodifiedSinceConstraint(date);
return this;
}
/**
* Gets the optional modified constraint that restricts this
* request to executing only if the object <b>has</b> been
* modified after the specified date.
*
* @return The optional modified constraint that restricts this
* request to executing only if the object <b>has</b>
* been modified after the specified date.
*
* @see GetObjectRequest#setModifiedSinceConstraint(Date)
* @see GetObjectRequest#withModifiedSinceConstraint(Date)
*/
public Date getModifiedSinceConstraint() {
return modifiedSinceConstraint;
}
/**
* Sets the optional modified constraint that restricts this request
* to executing only if the object <b>has</b> been modified after the
* specified date.
* <p>
* Note that Amazon S3 will ignore any dates occurring in the future.
* </p>
*
* @param date
* The modified constraint that restricts this request to
* executing only if the object <b>has</b> been modified
* after the specified date.
*
* @see GetObjectRequest#getModifiedSinceConstraint()
* @see GetObjectRequest#withModifiedSinceConstraint(Date)
*/
public void setModifiedSinceConstraint(Date date) {
this.modifiedSinceConstraint = date;
}
/**
* Sets the optional modified constraint that restricts this request
* to executing only if the object <b>has</b> been modified after the
* specified date.
* Returns this {@link GetObjectRequest}, enabling additional method
* calls to be chained together.
* <p>
* Note that Amazon S3 will ignore any dates occurring in the future.
*
* @param date
* The modified constraint that restricts this request to
* executing only if the object <b>has</b> been modified
* after the specified date.
*
* @return This {@link GetObjectRequest}, enabling additional method
* calls to be chained together.
*
* @see GetObjectRequest#getModifiedSinceConstraint()
* @see GetObjectRequest#setModifiedSinceConstraint(Date)
*/
public GetObjectRequest withModifiedSinceConstraint(Date date) {
setModifiedSinceConstraint(date);
return this;
}
}