org.netbeans.modules.classfile.Module Maven / Gradle / Ivy
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 org.netbeans.modules.classfile;
import java.io.DataInputStream;
import java.io.IOException;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
/**
* The JDK 9 Module attribute.
* @since 1.52
* @author Tomas Zezula
*/
public final class Module {
private final String name;
private final int flags;
private final String version;
private final List requires;
private final List exports;
private final List opens;
private final List uses;
private final List provides;
Module(final DataInputStream in, final ConstantPool cp) throws IOException {
final CPEntry entry = cp.get(in.readUnsignedShort());
if (entry.getTag() != ConstantPool.CONSTANT_Module) {
throw new LegacyClassFile("Java 9 older than b148."); //NOI18N
}
name = ((CPModuleInfo)entry).getName();
flags = in.readUnsignedShort();
int index = in.readUnsignedShort();
version = index == 0 ?
null :
((CPUTF8Info)cp.get(index)).getName();
final int reqCnt = in.readUnsignedShort();
final RequiresEntry[] req = new RequiresEntry[reqCnt];
for (int i=0; i getRequiresEntries() {
return requires;
}
/**
* Returns the exported packages.
* @return the list of {@link ExportsEntry}
*/
public List getExportsEntries() {
return exports;
}
/**
* Returns the opened packages.
* @return the list of {@link OpensEntry}
*/
public List getOpensEntries() {
return opens;
}
/**
* Returns the used services.
* @return the list of services used by this module
*/
public List getUses() {
return uses;
}
/**
* Returns the provided services.
* @return the list of {@link ProvidesEntry}
*/
public List getProvidesEntries() {
return provides;
}
/**
* Required module
*/
public static final class RequiresEntry {
private final String module;
private final int flags;
private final String version;
RequiresEntry(final DataInputStream in, final ConstantPool cp) throws IOException {
module = ((CPModuleInfo)cp.get(in.readUnsignedShort())).getName();
flags = in.readUnsignedShort();
int index = in.readUnsignedShort();
version = index == 0 ?
null :
((CPUTF8Info)cp.get(index)).getName();
}
/**
* Returns the module name.
* @return the module name
*/
public String getModule() {
return module;
}
/**
* Returns require modifiers.
* @return flags
*/
public int getFlags() {
return flags;
}
/**
* Returns the version of the required module.
* @return version of required module or null if not specified
*/
public String getVersion() {
return version;
}
@Override
public String toString() {
final StringBuilder sb = new StringBuilder("requires");
if ((flags & Access.TRANSITIVE) != 0) {
sb.append(" transitive"); //NOI18N
}
if ((flags & Access.STATIC_PHASE) != 0) {
sb.append(" static"); //NOI18N
}
if ((flags & Access.SYNTHETIC) != 0) {
sb.append(" synthetic"); //NOI18N
}
if ((flags & Access.MANDATED) != 0) {
sb.append(" mandated"); //NOI18N
}
sb.append(' ')
.append(module);
if (version != null) {
sb.append("@")
.append(version);
}
return sb.toString();
}
}
/**
* Exported package.
*/
public static final class ExportsEntry {
private final String pkg;
private final int flags;
private final List to;
ExportsEntry(final DataInputStream in, final ConstantPool cp) throws IOException {
pkg = ((CPPackageInfo) cp.get(in.readUnsignedShort())).getName();
flags = in.readUnsignedShort();
final int toCnt = in.readUnsignedShort();
final String[] t = new String[toCnt];
for (int i=0; i< toCnt; i++) {
t[i] = ((CPModuleInfo) cp.get(in.readUnsignedShort())).getName();
}
to = Collections.unmodifiableList(Arrays.asList(t));
}
/**
* Name of exported package.
* @return the package name
*/
public String getPackage() {
return pkg;
}
/**
* Returns export modifiers.
* @return flags
*/
public int getFlags() {
return flags;
}
/**
* Returns a list of modules to which the package is exported.
* @return module list.
*/
public List getExportsTo() {
return to;
}
@Override
public String toString() {
final StringBuilder sb = new StringBuilder("exports");
if ((flags & Access.SYNTHETIC) != 0) {
sb.append(" synthetic"); //NOI18N
}
if ((flags & Access.MANDATED) != 0) {
sb.append(" mandated"); //NOI18N
}
sb.append(' ')
.append(pkg);
if (!to.isEmpty()) {
sb.append(" to "); //NOI18N
boolean first = true;
for (String m : to) {
if (!first) {
sb.append(", "); //NOI18N
} else {
first = false;
}
sb.append(m);
}
}
return sb.toString();
}
}
/**
* Opened package.
*/
public static final class OpensEntry {
private final String pkg;
private final int flags;
private final List to;
OpensEntry(final DataInputStream in, final ConstantPool cp) throws IOException {
pkg = ((CPPackageInfo) cp.get(in.readUnsignedShort())).getName();
flags = in.readUnsignedShort();
final int toCnt = in.readUnsignedShort();
final String[] t = new String[toCnt];
for (int i=0; i< toCnt; i++) {
t[i] = ((CPModuleInfo) cp.get(in.readUnsignedShort())).getName();
}
to = Collections.unmodifiableList(Arrays.asList(t));
}
/**
* Name of opened package.
* @return the package name
*/
public String getPackage() {
return pkg;
}
/**
* Returns open modifiers.
* @return flags
*/
public int getFlags() {
return flags;
}
/**
* Returns a list of modules to which the package is opened.
* @return module list.
*/
public List getOpensTo() {
return to;
}
@Override
public String toString() {
final StringBuilder sb = new StringBuilder("opens");
if ((flags & Access.SYNTHETIC) != 0) {
sb.append(" synthetic"); //NOI18N
}
if ((flags & Access.MANDATED) != 0) {
sb.append(" mandated"); //NOI18N
}
sb.append(' ')
.append(pkg);
if (!to.isEmpty()) {
sb.append(" to "); //NOI18N
boolean first = true;
for (String m : to) {
if (!first) {
sb.append(", "); //NOI18N
} else {
first = false;
}
sb.append(m);
}
}
return sb.toString();
}
}
/**
* Provided service.
*/
public static final class ProvidesEntry {
private final ClassName service;
private final List impls;
ProvidesEntry(final DataInputStream in, final ConstantPool cp) throws IOException {
service = ((CPClassInfo)cp.get(in.readUnsignedShort())).getClassName();
final int cnt = in.readUnsignedShort();
final ClassName[] ims = new ClassName[cnt];
for (int i=0; i< cnt; i++) {
ims[i] = ((CPClassInfo)cp.get(in.readUnsignedShort())).getClassName();
}
impls = Collections.unmodifiableList(Arrays.asList(ims));
}
/**
* Service type.
* @return the service type
*/
public ClassName getService() {
return service;
}
/**
* Service implementation.
* @return the class implementing the service
*/
public List getImplementations() {
return impls;
}
@Override
public String toString() {
final StringBuilder sb = new StringBuilder()
.append("provides ") //NOI18N
.append(service);
if (!impls.isEmpty()) {
sb.append(" with "); //NOI18N
boolean first = true;
for (ClassName m : impls) {
if (!first) {
sb.append(", "); //NOI18N
} else {
first = false;
}
sb.append(m.getExternalName());
}
}
return sb.toString();
}
}
}
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