root / branches / v2_0_0_prep / libraries / libTools / src / org / gvsig / tools / extensionpoint / impl / DefaultExtensionPoint.java @ 24906
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package org.gvsig.tools.extensionpoint.impl; |
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import java.lang.reflect.InvocationTargetException; |
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import java.util.ArrayList; |
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import java.util.Arrays; |
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import java.util.Collections; |
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import java.util.HashMap; |
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import java.util.Iterator; |
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import java.util.LinkedHashMap; |
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import java.util.List; |
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import java.util.Map; |
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import org.gvsig.tools.extensionpoint.ExtensionBuilder; |
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import org.gvsig.tools.extensionpoint.ExtensionPoint; |
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import org.gvsig.tools.extensionpoint.ExtensionPointManager; |
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public class DefaultExtensionPoint implements ExtensionPoint { |
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class Extension implements ExtensionPoint.Extension { |
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private Class extension; |
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private ExtensionBuilder builder;
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private String name; |
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private String description; |
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List alias;
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Extension(String name, String description, Class extension) { |
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alias = new ArrayList(); |
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this.name = name;
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this.description = description;
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this.builder = null; |
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this.extension = extension;
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} |
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Extension(String name, String description, ExtensionBuilder builder) { |
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alias = new ArrayList(); |
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this.name = name;
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this.description = description;
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this.builder = builder;
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this.extension = null; |
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} |
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public List getAlias() { |
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return Collections.unmodifiableList(this.alias); |
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} |
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public ExtensionBuilder getBuilder() {
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return this.builder; |
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} |
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public String getDescription() { |
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return this.description; |
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} |
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public Class getExtension() { |
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return this.extension; |
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} |
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public String getName() { |
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return this.name; |
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} |
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public boolean isBuilder() { |
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return this.builder != null; |
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} |
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public Object create(String name) throws InstantiationException, |
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IllegalAccessException {
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if (isBuilder()) {
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return getBuilder().create();
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} |
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return manager.create(getExtension());
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} |
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public Object create(String name, Object[] args) throws SecurityException, |
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IllegalArgumentException, NoSuchMethodException, |
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InstantiationException, IllegalAccessException, |
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InvocationTargetException {
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if (isBuilder()) {
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return getBuilder().create(args);
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} |
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return manager.create(getExtension(), args);
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} |
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public Object create(String name, Map args) throws SecurityException, |
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IllegalArgumentException, NoSuchMethodException, |
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InstantiationException, IllegalAccessException, |
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InvocationTargetException {
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if (isBuilder()) {
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return getBuilder().create(args);
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} |
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return manager.create(getExtension(), args);
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} |
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} |
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private String name; |
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private String description; |
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private Map alias; // Map of Extension |
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private LinkedHashMap extensions; // Map of Extension |
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private DefaultExtensionPointManager manager;
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DefaultExtensionPoint(ExtensionPointManager manager, String name) {
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this.initialize(manager, name, ""); |
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} |
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DefaultExtensionPoint(ExtensionPointManager manager, String name,
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String description) {
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this.initialize(manager, name, description);
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} |
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private void initialize(ExtensionPointManager manager, String name, |
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String description) {
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this.manager = (DefaultExtensionPointManager) manager;
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this.name = name;
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this.description = description;
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this.alias = new HashMap(); |
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this.extensions = new LinkedHashMap(); |
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} |
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private ExtensionPoint.Extension append(Extension extension) {
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this.extensions.put(extension.getName(), extension);
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return extension;
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} |
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public ExtensionPoint.Extension append(String name, String description, |
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ExtensionBuilder builder) {
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return append(new Extension(name, description, builder)); |
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} |
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public ExtensionPoint.Extension append(String name, String description, |
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Class extension) {
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return append(new Extension(name, description, extension)); |
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} |
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public String getDescription() { |
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return this.description; |
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} |
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public String getName() { |
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return this.name; |
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} |
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private Extension insert(Extension extension) {
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LinkedHashMap x = new LinkedHashMap(); |
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x.put(extension.getName(), extension); |
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x.putAll(this.extensions);
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this.extensions = x;
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return extension;
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} |
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public ExtensionPoint.Extension insert(String name, String description, |
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Class extension) {
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return insert(new Extension(name, description, extension)); |
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} |
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public ExtensionPoint.Extension insert(String name, String description, |
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ExtensionBuilder builder) {
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return insert(new Extension(name, description, builder)); |
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} |
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private ExtensionPoint.Extension insert(String beforeName, |
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Extension extension) {
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if( this.extensions.get(beforeName) == null ) { |
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return null; |
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} |
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LinkedHashMap x = new LinkedHashMap(); |
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Iterator it = this.extensions.entrySet().iterator(); |
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while (it.hasNext()) {
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Map.Entry e = (Map.Entry) it.next(); |
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if (e.getKey().equals(beforeName)) {
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x.put(extension.getName(), extension); |
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} |
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x.put(e.getKey(), e.getValue()); |
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} |
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this.extensions = x;
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return extension;
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} |
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synchronized public ExtensionPoint.Extension insert(String beforeName, |
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String name,
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String description, Class extension) { |
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return insert(beforeName, new Extension(name, description, extension)); |
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} |
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synchronized public ExtensionPoint.Extension insert(String beforeName, |
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String name,
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String description, ExtensionBuilder builder) {
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return insert(beforeName, new Extension(name, description, builder)); |
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} |
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public void setDescription(String description) { |
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this.description = description;
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} |
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public boolean addAlias(String name, String alias) { |
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Extension extension = (Extension) this.extensions.get(name);
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if (extension == null) { |
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return false; |
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} |
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this.alias.put(alias, extension);
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extension.alias.add(alias); |
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return true; |
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} |
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public Object create(String name) throws InstantiationException, |
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IllegalAccessException {
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Extension extension = (Extension) this.alias.get(name);
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if (extension == null) { |
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extension = (Extension) this.extensions.get(name);
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if (extension == null) { |
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return null; // FIXME: throw exception |
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} |
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} |
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return extension.create(name);
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} |
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public Object create(String name, Object[] args) throws SecurityException, |
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IllegalArgumentException, NoSuchMethodException, |
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InstantiationException, IllegalAccessException, |
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InvocationTargetException {
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Extension extension = (Extension) this.alias.get(name);
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if (extension == null) { |
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extension = (Extension) this.extensions.get(name);
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if (extension == null) { |
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return null; // FIXME: throw exception |
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} |
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} |
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return extension.create(name,args);
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} |
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public Object create(String name, Map args) throws SecurityException, |
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IllegalArgumentException, NoSuchMethodException, |
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InstantiationException, IllegalAccessException, |
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InvocationTargetException {
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Extension extension = (Extension) this.alias.get(name);
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if (extension == null) { |
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extension = (Extension) this.extensions.get(name);
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if (extension == null) { |
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return null; // FIXME: throw exception |
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} |
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} |
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return extension.create(name,args);
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} |
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public ExtensionPoint.Extension get(String name) { |
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Extension extension = (Extension) this.alias.get(name);
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if (extension == null) { |
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extension = (Extension) this.extensions.get(name);
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if (extension == null) { |
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return null; // FIXME: throw exception |
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} |
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} |
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return extension;
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} |
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public int getCount() { |
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return this.extensions.size(); |
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} |
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public Iterator iterator() { |
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return this.extensions.values().iterator(); |
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} |
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public List getNames() { |
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String[] names = (String[]) this.extensions.keySet().toArray( |
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new String[] {}); |
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Arrays.sort(names);
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return Collections.unmodifiableList(Arrays.asList(names)); |
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} |
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public boolean has(String name) { |
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return this.extensions.containsKey(name); |
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} |
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} |