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/*
* Copyright (C) 2013 The Android Open Source Project
*
* 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 android.print;
import android.annotation.NonNull;
import android.annotation.Nullable;
import java.util.Objects;
/**
* This class represents a print job from the perspective of an
* application. It contains behavior methods for performing operations
* on it as well as methods for querying its state. A snapshot of the
* print job state is represented by the {@link PrintJobInfo} class.
* The state of a print job may change over time. An application receives
* instances of this class when creating a print job or querying for
* its print jobs.
*/
public final class PrintJob {
private final @NonNull PrintManager mPrintManager;
private @NonNull PrintJobInfo mCachedInfo;
PrintJob(@NonNull PrintJobInfo info, @NonNull PrintManager printManager) {
mCachedInfo = info;
mPrintManager = printManager;
}
/**
* Gets the unique print job id.
*
* @return The id.
*/
public @Nullable PrintJobId getId() {
return mCachedInfo.getId();
}
/**
* Gets the {@link PrintJobInfo} that describes this job.
* <p>
* <strong>Node:</strong>The returned info object is a snapshot of the
* current print job state. Every call to this method returns a fresh
* info object that reflects the current print job state.
* </p>
*
* @return The print job info.
*/
public @NonNull PrintJobInfo getInfo() {
if (isInImmutableState()) {
return mCachedInfo;
}
PrintJobInfo info = mPrintManager.getPrintJobInfo(mCachedInfo.getId());
if (info != null) {
mCachedInfo = info;
}
return mCachedInfo;
}
/**
* Cancels this print job. You can request cancellation of a
* queued, started, blocked, or failed print job.
*
* @see #isQueued()
* @see #isStarted()
* @see #isBlocked()
* @see #isFailed()
*/
public void cancel() {
final int state = getInfo().getState();
if (state == PrintJobInfo.STATE_QUEUED
|| state == PrintJobInfo.STATE_STARTED
|| state == PrintJobInfo.STATE_BLOCKED
|| state == PrintJobInfo.STATE_FAILED) {
mPrintManager.cancelPrintJob(mCachedInfo.getId());
}
}
/**
* Restarts this print job. You can request restart of a failed
* print job.
*
* @see #isFailed()
*/
public void restart() {
if (isFailed()) {
mPrintManager.restartPrintJob(mCachedInfo.getId());
}
}
/**
* Gets whether this print job is queued. Such a print job is
* ready to be printed. You can request a cancellation via
* {@link #cancel()}.
*
* @return Whether the print job is queued.
*
* @see #cancel()
*/
public boolean isQueued() {
return getInfo().getState() == PrintJobInfo.STATE_QUEUED;
}
/**
* Gets whether this print job is started. Such a print job is
* being printed. You can request a cancellation via
* {@link #cancel()}.
*
* @return Whether the print job is started.
*
* @see #cancel()
*/
public boolean isStarted() {
return getInfo().getState() == PrintJobInfo.STATE_STARTED;
}
/**
* Gets whether this print job is blocked. Such a print job is halted
* due to an abnormal condition. You can request a cancellation via
* {@link #cancel()}.
*
* @return Whether the print job is blocked.
*
* @see #cancel()
*/
public boolean isBlocked() {
return getInfo().getState() == PrintJobInfo.STATE_BLOCKED;
}
/**
* Gets whether this print job is completed. Such a print job
* is successfully printed. You can neither cancel nor restart
* such a print job.
*
* @return Whether the print job is completed.
*/
public boolean isCompleted() {
return getInfo().getState() == PrintJobInfo.STATE_COMPLETED;
}
/**
* Gets whether this print job is failed. Such a print job is
* not successfully printed due to an error. You can request
* a restart via {@link #restart()} or cancel via {@link #cancel()}.
*
* @return Whether the print job is failed.
*
* @see #restart()
* @see #cancel()
*/
public boolean isFailed() {
return getInfo().getState() == PrintJobInfo.STATE_FAILED;
}
/**
* Gets whether this print job is cancelled. Such a print job was
* cancelled as a result of a user request. This is a final state.
* You cannot restart such a print job.
*
* @return Whether the print job is cancelled.
*/
public boolean isCancelled() {
return getInfo().getState() == PrintJobInfo.STATE_CANCELED;
}
private boolean isInImmutableState() {
final int state = mCachedInfo.getState();
return state == PrintJobInfo.STATE_COMPLETED
|| state == PrintJobInfo.STATE_CANCELED;
}
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (obj == null) {
return false;
}
if (getClass() != obj.getClass()) {
return false;
}
PrintJob other = (PrintJob) obj;
return Objects.equals(mCachedInfo.getId(), other.mCachedInfo.getId());
}
@Override
public int hashCode() {
PrintJobId printJobId = mCachedInfo.getId();
if (printJobId == null) {
return 0;
} else {
return printJobId.hashCode();
}
}
}
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