author | alanb |
Fri, 10 Feb 2017 09:04:39 +0000 | |
changeset 43712 | 5dfd0950317c |
parent 36511 | 9d0388c6b336 |
permissions | -rw-r--r-- |
36511 | 1 |
/* |
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* Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. Oracle designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Oracle in the LICENSE file that accompanied this code. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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package java.lang.module; |
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import java.util.Objects; |
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import java.util.Set; |
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/** |
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* A module in a graph of <em>resolved modules</em>. |
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* |
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* <p> {@code ResolvedModule} defines the {@link #configuration configuration} |
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* method to get the configuration that the resolved module is in. It defines |
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* the {@link #reference() reference} method to get the reference to the |
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* module's content. |
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* |
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* @since 9 |
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43712
5dfd0950317c
8173393: Module system implementation refresh (2/2017)
alanb
parents:
36511
diff
changeset
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* @spec JPMS |
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* @see Configuration#modules() |
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*/ |
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public final class ResolvedModule { |
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private final Configuration cf; |
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private final ModuleReference mref; |
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ResolvedModule(Configuration cf, ModuleReference mref) { |
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this.cf = Objects.requireNonNull(cf); |
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this.mref = Objects.requireNonNull(mref); |
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} |
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/** |
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* Returns the configuration that this resolved module is in. |
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* |
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* @return The configuration that this resolved module is in |
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*/ |
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public Configuration configuration() { |
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return cf; |
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} |
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/** |
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* Returns the reference to the module's content. |
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* |
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* @return The reference to the module's content |
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*/ |
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public ModuleReference reference() { |
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return mref; |
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} |
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/** |
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* Returns the module descriptor. |
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* |
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* This convenience method is the equivalent to invoking: |
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* <pre> {@code |
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* reference().descriptor() |
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* }</pre> |
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* |
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* @return The module descriptor |
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*/ |
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ModuleDescriptor descriptor() { |
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return reference().descriptor(); |
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} |
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/** |
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* Returns the module name. |
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* |
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* This convenience method is the equivalent to invoking: |
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* <pre> {@code |
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* reference().descriptor().name() |
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* }</pre> |
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* |
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* @return The module name |
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*/ |
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public String name() { |
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return reference().descriptor().name(); |
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} |
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/** |
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* Returns the set of resolved modules that this resolved module reads. |
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* |
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* @return A possibly-empty unmodifiable set of resolved modules that |
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* this resolved module reads |
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*/ |
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public Set<ResolvedModule> reads() { |
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return cf.reads(this); |
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} |
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/** |
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* Computes a hash code for this resolved module. |
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* |
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* <p> The hash code is based upon the components of the resolved module |
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* and satisfies the general contract of the {@link Object#hashCode |
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* Object.hashCode} method. </p> |
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* |
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* @return The hash-code value for this resolved module |
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*/ |
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@Override |
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public int hashCode() { |
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return cf.hashCode() ^ mref.hashCode(); |
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} |
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/** |
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* Tests this resolved module for equality with the given object. |
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* |
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* <p> If the given object is not a {@code ResolvedModule} then this |
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* method returns {@code false}. Two {@code ResolvedModule} objects are |
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* equal if they are in the same configuration and have equal references |
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* to the module content. </p> |
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* |
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* <p> This method satisfies the general contract of the {@link |
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* java.lang.Object#equals(Object) Object.equals} method. </p> |
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* |
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* @param ob |
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* the object to which this object is to be compared |
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* |
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* @return {@code true} if, and only if, the given object is a module |
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* reference that is equal to this module reference |
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*/ |
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@Override |
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public boolean equals(Object ob) { |
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if (!(ob instanceof ResolvedModule)) |
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return false; |
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ResolvedModule that = (ResolvedModule) ob; |
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return Objects.equals(this.cf, that.cf) |
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&& Objects.equals(this.mref, that.mref); |
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} |
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/** |
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* Returns a string describing this resolved module. |
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* |
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* @return A string describing this resolved module |
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*/ |
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@Override |
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public String toString() { |
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return System.identityHashCode(cf) + "/" + name(); |
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} |
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} |