bundles/org.eclipse.core.runtime/src/org/eclipse/core/internal/plugins/RegistryCacheWriter.java

/*******************************************************************************
 * Copyright (c) 2000, 2003 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials 
 * are made available under the terms of the Common Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/cpl-v10.html
 * 
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/

package org.eclipse.core.internal.plugins;

import java.io.*;
import java.util.HashMap;
import java.util.zip.CRC32;
import java.util.zip.CheckedOutputStream;

import org.eclipse.core.boot.BootLoader;
import org.eclipse.core.internal.runtime.InternalPlatform;
import org.eclipse.core.internal.runtime.Policy;
import org.eclipse.core.runtime.*;
import org.eclipse.core.runtime.model.*;

public class RegistryCacheWriter {
	// See RegistryCacheReader for constants commonly used here too.

	// objectTable will be a hashmap of objects.  The objects will be things 
	// like a plugin descriptor, extension, extension point, etc.  The integer 
	// index value will be used in the cache to allow cross-references in the 
	// cached registry.
	HashMap objectTable = null;
	
	public MultiStatus cacheWriteProblems = null;
	
	public static final boolean DEBUG_REGISTRY_CACHE = false;
	
public RegistryCacheWriter() {
	super();
}
private int addToObjectTable(Object object) {
	if (objectTable == null) {
		objectTable = new HashMap();
	}
	objectTable.put(object, new Integer(objectTable.size()));
	// return the index of the object just added (i.e. size - 1)
	return (objectTable.size() - 1);
}
private int getFromObjectTable(Object object) {
	if (objectTable != null) {
		Object objectResult = objectTable.get(object);
		if (objectResult != null) {
			return ((Integer) objectResult).intValue();
		}
	}
	return -1;
}
private void writeLabel(byte labelValue, DataOutputStream out) {
	try {
		if (DEBUG_REGISTRY_CACHE) {
			out.writeUTF (RegistryCacheReader.decipherLabel(labelValue));
		} else {
			out.writeByte(labelValue);
		}
	} catch (IOException ioe) {
		cacheWriteProblems.add(new Status(IStatus.WARNING, Platform.PI_RUNTIME, Platform.PARSE_PROBLEM, Policy.bind ("meta.regCacheIOException", RegistryCacheReader.decipherLabel(labelValue)), ioe)); //$NON-NLS-1$
	}
}
public void writeConfigurationElement(ConfigurationElementModel configElement, DataOutputStream out) {
	try {
		String outString;

		writeLabel(RegistryCacheReader.CONFIGURATION_ELEMENT_LABEL, out);

		writeLabel(RegistryCacheReader.READONLY_LABEL, out);
		out.writeBoolean(configElement.isReadOnly());

		writeLabel(RegistryCacheReader.START_LINE, out);
		out.writeInt(configElement.getStartLine());

		if ((outString = configElement.getName()) != null) {
			writeLabel(RegistryCacheReader.NAME_LABEL, out);
			out.writeUTF(outString);
		}

		if ((outString = configElement.getValue()) != null) {
			writeLabel(RegistryCacheReader.VALUE_LABEL, out);
			out.writeUTF(outString);
		}

		ConfigurationPropertyModel[] properties = configElement.getProperties();
		if (properties != null) {
			writeLabel(RegistryCacheReader.PROPERTIES_LENGTH_LABEL, out);
			out.writeInt(properties.length);
			for (int i = 0; i < properties.length; i++) {
				writeConfigurationProperty(properties[i], out);
			}
		}

		ConfigurationElementModel[] subElements = configElement.getSubElements();
		if (subElements != null) {
			writeLabel(RegistryCacheReader.SUBELEMENTS_LENGTH_LABEL, out);
			out.writeInt(subElements.length);
			for (int i = 0; i < subElements.length; i++) {
				writeConfigurationElement(subElements[i], out);
			}
		}

		writeLabel(RegistryCacheReader.CONFIGURATION_ELEMENT_END_LABEL, out);
	} catch (IOException ioe) {
		cacheWriteProblems.add(new Status(IStatus.WARNING, Platform.PI_RUNTIME, Platform.PARSE_PROBLEM, Policy.bind ("meta.regCacheIOException", RegistryCacheReader.decipherLabel(RegistryCacheReader.CONFIGURATION_ELEMENT_LABEL)), ioe)); //$NON-NLS-1$
	}
}
public void writeConfigurationProperty(ConfigurationPropertyModel configProperty, DataOutputStream out) {
	try {
		String outString;

		writeLabel(RegistryCacheReader.CONFIGURATION_PROPERTY_LABEL, out);

		writeLabel(RegistryCacheReader.READONLY_LABEL, out);
		out.writeBoolean(configProperty.isReadOnly());
		
		writeLabel(RegistryCacheReader.START_LINE, out);
		out.writeInt(configProperty.getStartLine());

		if ((outString = configProperty.getName()) != null) {
			writeLabel(RegistryCacheReader.NAME_LABEL, out);
			out.writeUTF(outString);
		}

		if ((outString = configProperty.getValue()) != null) {
			writeLabel(RegistryCacheReader.VALUE_LABEL, out);
			out.writeUTF(outString);
		}

		writeLabel(RegistryCacheReader.CONFIGURATION_PROPERTY_END_LABEL, out);
	} catch (IOException ioe) {
		cacheWriteProblems.add(new Status(IStatus.WARNING, Platform.PI_RUNTIME, Platform.PARSE_PROBLEM, Policy.bind ("meta.regCacheIOException", RegistryCacheReader.decipherLabel(RegistryCacheReader.CONFIGURATION_PROPERTY_LABEL)), ioe)); //$NON-NLS-1$
	}
}
public void writeExtension(ExtensionModel extension, DataOutputStream out) {
	try {
		// Check to see if this extension already exists in the objectTable.  If it
		// is there, it has already been written to the cache so just write out
		// the index.
		int extensionIndex = getFromObjectTable(extension);
		if (extensionIndex != -1) {
			// this extension is already there
			writeLabel(RegistryCacheReader.EXTENSION_INDEX_LABEL, out);
			out.writeInt(extensionIndex);
			return;
		}
		// add this object to the object table first
		addToObjectTable(extension);

		String outString;

		writeLabel(RegistryCacheReader.PLUGIN_EXTENSION_LABEL, out);

		writeLabel(RegistryCacheReader.READONLY_LABEL, out);
		out.writeBoolean(extension.isReadOnly());

		writeLabel(RegistryCacheReader.START_LINE, out);
		out.writeInt(extension.getStartLine());

		if ((outString = extension.getName()) != null) {
			writeLabel(RegistryCacheReader.NAME_LABEL, out);
			out.writeUTF(outString);
		}

		if ((outString = extension.getExtensionPoint()) != null) {
			writeLabel(RegistryCacheReader.EXTENSION_EXT_POINT_NAME_LABEL, out);
			out.writeUTF(outString);
		}

		if ((outString = extension.getId()) != null) {
			writeLabel(RegistryCacheReader.ID_LABEL, out);
			out.writeUTF(outString);
		}

		writeSubElements(out, extension);

		// Now worry about the parent plugin descriptor or plugin fragment
		PluginModel parent = extension.getParent();
		int parentIndex = getFromObjectTable(parent);
		writeLabel(RegistryCacheReader.EXTENSION_PARENT_LABEL, out);
		if (parentIndex != -1) {
			// We have already written this plugin or fragment.  Just use the index.
			if (parent instanceof PluginDescriptorModel) {
				writeLabel(RegistryCacheReader.PLUGIN_INDEX_LABEL, out);
			} else /* must be a fragment */ {
				writeLabel(RegistryCacheReader.FRAGMENT_INDEX_LABEL, out);
			}
			out.writeInt(parentIndex);
		} else {
			// We haven't visited this plugin or fragment yet, so write it explicitly
			if (parent instanceof PluginDescriptorModel) {
				writePluginDescriptor((PluginDescriptorModel)parent, out);
			} else /* must be a fragment */ {
				writePluginFragment((PluginFragmentModel)parent, out);
			}
		}

		writeLabel(RegistryCacheReader.EXTENSION_END_LABEL, out);
	} catch (IOException ioe) {
		cacheWriteProblems.add(new Status(IStatus.WARNING, Platform.PI_RUNTIME, Platform.PARSE_PROBLEM, Policy.bind ("meta.regCacheIOException", RegistryCacheReader.decipherLabel(RegistryCacheReader.PLUGIN_EXTENSION_LABEL)), ioe)); //$NON-NLS-1$
	}
}
public void writeSubElements(DataOutputStream out, ExtensionModel extension) throws IOException {
	ConfigurationElementModel[] subElements = extension.getSubElements();
	if (subElements == null) 
		return;		
	writeLabel(RegistryCacheReader.SUBELEMENTS_LABEL, out);
	// write the offset for sub-elements data
	out.writeInt(out.size());
	// write the sub-elements data to a memory stream...
	// so we can prefix that data with its size (to easily skip it) 
	ByteArrayOutputStream arrayOut = new ByteArrayOutputStream();
	CheckedOutputStream checkedOut = new CheckedOutputStream(arrayOut, new CRC32());
	DataOutputStream tempOut = new DataOutputStream(checkedOut);		 
	writeLabel(RegistryCacheReader.SUBELEMENTS_LENGTH_LABEL, tempOut);
	tempOut.writeInt(subElements.length);
	for (int i = 0; i < subElements.length; i++) 
		writeConfigurationElement(subElements[i], tempOut);
	tempOut.close();
	// write the block size, the data and a checksum
	out.writeInt(arrayOut.size());
	out.write(arrayOut.toByteArray());
	out.writeLong(checkedOut.getChecksum().getValue());
}
public void writeExtensionPoint(ExtensionPointModel extPoint, DataOutputStream out) {
	try {
		// Check to see if this extension point already exists in the objectTable.  If it
		// is there, it has already been written to the cache so just write out
		// the index.
		int extensionPointIndex = getFromObjectTable(extPoint);
		if (extensionPointIndex != -1) {
			// this extension point is already there
			writeLabel(RegistryCacheReader.EXTENSION_POINT_INDEX_LABEL, out);
			out.writeInt(extensionPointIndex);
			return;
		}
		// add this object to the object table first
		addToObjectTable(extPoint);
		String outString;

		writeLabel(RegistryCacheReader.PLUGIN_EXTENSION_POINT_LABEL, out);

		writeLabel(RegistryCacheReader.READONLY_LABEL, out);
		out.writeBoolean(extPoint.isReadOnly());

		writeLabel(RegistryCacheReader.START_LINE, out);
		out.writeInt(extPoint.getStartLine());

		if ((outString = extPoint.getName()) != null) {
			writeLabel(RegistryCacheReader.NAME_LABEL, out);
			out.writeUTF(outString);
		}

		if ((outString = extPoint.getId()) != null) {
			writeLabel(RegistryCacheReader.ID_LABEL, out);
			out.writeUTF(outString);
		}

		if ((outString = extPoint.getSchema()) != null) {
			writeLabel(RegistryCacheReader.EXTENSION_POINT_SCHEMA_LABEL, out);
			out.writeUTF(outString);
		}

		// Write out the parent's index.  We know we have
		// already written this plugin or fragment to the cache
		PluginModel parent = extPoint.getParent();
		if (parent != null) {
			int parentIndex = getFromObjectTable(parent);
			if (parentIndex != -1) {
				writeLabel(RegistryCacheReader.EXTENSION_POINT_PARENT_LABEL, out);
				out.writeInt(parentIndex);
			}
		}

		// Now do the extensions.
		ExtensionModel[] extensions = extPoint.getDeclaredExtensions();
		int extLength = extensions == null ? 0 : extensions.length;
		if (extLength != 0) {
			writeLabel(RegistryCacheReader.EXTENSION_POINT_EXTENSIONS_LENGTH_LABEL, out);
			out.writeInt(extLength);
			writeLabel(RegistryCacheReader.EXTENSION_POINT_EXTENSIONS_LABEL, out);
			for (int i = 0; i < extLength; i++) {
				// Check to see if the extension exists in the objectTable first
				int extensionIndex = getFromObjectTable(extensions[i]);
				if (extensionIndex != -1) {
					// Already in the objectTable and written to the cache
					writeLabel(RegistryCacheReader.EXTENSION_INDEX_LABEL, out);
					out.writeInt(extensionIndex);
				} else {
					writeExtension(extensions[i], out);
				}
			}
		}

		writeLabel(RegistryCacheReader.EXTENSION_POINT_END_LABEL, out);
	} catch (IOException ioe) {
		cacheWriteProblems.add(new Status(IStatus.WARNING, Platform.PI_RUNTIME, Platform.PARSE_PROBLEM, Policy.bind ("meta.regCacheIOException", RegistryCacheReader.decipherLabel(RegistryCacheReader.PLUGIN_EXTENSION_POINT_LABEL)), ioe)); //$NON-NLS-1$
	}
}
public void writeHeaderInformation(DataOutputStream out) {
	try {
		out.writeInt(RegistryCacheReader.REGISTRY_CACHE_VERSION);
		// install stamp
		out.writeLong(InternalPlatform.getRegistryCacheTimeStamp());
		// OS stamp
		out.writeUTF(BootLoader.getOS());
		// windows system stamp
		out.writeUTF(BootLoader.getWS());
		// locale stamp
		out.writeUTF(BootLoader.getNL());
	} catch (IOException ioe) {
		cacheWriteProblems.add(new Status(IStatus.WARNING, Platform.PI_RUNTIME, Platform.PARSE_PROBLEM, Policy.bind ("meta.regCacheIOException", "HeaderInformation"), ioe)); //$NON-NLS-1$ //$NON-NLS-2$
	}
}
public void writeLibrary(LibraryModel library, DataOutputStream out) {
	try {
		// Check to see if this library already exists in the objectTable.  If it
		// is there, it has already been written to the cache so just write out
		// the index.
		int libraryIndex = getFromObjectTable(library);
		if (libraryIndex != -1) {
			// this library is already there
			writeLabel(RegistryCacheReader.LIBRARY_INDEX_LABEL, out);
			out.writeInt(libraryIndex);
			return;
		}
		// add this object to the object table first
		addToObjectTable(library);
		String outString;

		writeLabel(RegistryCacheReader.PLUGIN_LIBRARY_LABEL, out);

		writeLabel(RegistryCacheReader.READONLY_LABEL, out);
		out.writeBoolean(library.isReadOnly());

		writeLabel(RegistryCacheReader.START_LINE, out);
		out.writeInt(library.getStartLine());

		if ((outString = library.getName()) != null) {
			writeLabel(RegistryCacheReader.NAME_LABEL, out);
			out.writeUTF(outString);
		}
		if ((outString = library.getType()) != null) {
			writeLabel(RegistryCacheReader.TYPE_LABEL, out);
			out.writeUTF(outString);
		}

		String[] exports = null;
		if ((exports = library.getExports()) != null) {
			writeLabel(RegistryCacheReader.LIBRARY_EXPORTS_LENGTH_LABEL, out);
			out.writeInt(exports.length);
			writeLabel(RegistryCacheReader.LIBRARY_EXPORTS_LABEL, out);
			for (int i = 0; i < exports.length; i++) {
				out.writeUTF(exports[i]);
			}
		}
		
		// write out the declared package prefixes
		String[] prefixes = library.getPackagePrefixes();
		if (prefixes != null) {
			writeLabel(RegistryCacheReader.LIBRARY_PACKAGES_PREFIXES_LENGTH_LABEL, out);
			out.writeInt(prefixes.length);
			writeLabel(RegistryCacheReader.LIBRARY_PACKAGES_PREFIXES_LABEL, out);
			for (int i=0; i<prefixes.length; i++)
				out.writeUTF(prefixes[i]);
		}

		// Don't bother caching 'isExported' and 'isFullyExported'.  There
		// is no way of explicitly setting these fields.  They are computed
		// from the values in the 'exports' list.
		writeLabel(RegistryCacheReader.LIBRARY_END_LABEL, out);
	} catch (IOException ioe) {
		cacheWriteProblems.add(new Status(IStatus.WARNING, Platform.PI_RUNTIME, Platform.PARSE_PROBLEM, Policy.bind ("meta.regCacheIOException", RegistryCacheReader.decipherLabel(RegistryCacheReader.PLUGIN_LIBRARY_LABEL)), ioe)); //$NON-NLS-1$
	}
}
public void writePluginDescriptor(PluginDescriptorModel plugin, DataOutputStream out) {

	try {
		// Check to see if this plugin already exists in the objectTable.  If it is there,
		// it has already been written to the cache so just write out the index.
		int pluginIndex = getFromObjectTable(plugin);
		if (pluginIndex != -1) {
			// this plugin is already there
			writeLabel(RegistryCacheReader.PLUGIN_INDEX_LABEL, out);
			out.writeInt(pluginIndex);
			return;
		}

		// add this object to the object table first
		addToObjectTable(plugin);
		String outString;

		writeLabel(RegistryCacheReader.PLUGIN_LABEL, out);

		writeLabel(RegistryCacheReader.READONLY_LABEL, out);
		out.writeBoolean(plugin.isReadOnly());
		
		writeLabel(RegistryCacheReader.START_LINE, out);
		out.writeInt(plugin.getStartLine());

		if ((outString = plugin.getName()) != null) {
			writeLabel(RegistryCacheReader.NAME_LABEL, out);
			out.writeUTF(outString);
		}
		if ((outString = plugin.getId()) != null) {
			writeLabel(RegistryCacheReader.ID_LABEL, out);
			out.writeUTF(outString);
		}
		if ((outString = plugin.getProviderName()) != null) {
			writeLabel(RegistryCacheReader.PLUGIN_PROVIDER_NAME_LABEL, out);
			out.writeUTF(outString);
		}
		if ((outString = plugin.getVersion()) != null) {
			writeLabel(RegistryCacheReader.VERSION_LABEL, out);
			out.writeUTF(outString);
		}
		if ((outString = plugin.getPluginClass()) != null) {
			writeLabel(RegistryCacheReader.PLUGIN_CLASS_LABEL, out);
			out.writeUTF(outString);
		}
		if ((outString = plugin.getLocation()) != null) {
			writeLabel(RegistryCacheReader.PLUGIN_LOCATION_LABEL, out);
			out.writeUTF(outString);
		}
		writeLabel(RegistryCacheReader.PLUGIN_ENABLED_LABEL, out);
		out.writeBoolean(plugin.getEnabled());

		// write out prerequisites
		PluginPrerequisiteModel[] requires = plugin.getRequires();
		int reqSize = (requires == null) ? 0 : requires.length;
		if (reqSize != 0) {
			for (int i = 0; i < reqSize; i++)
				writePluginPrerequisite(requires[i], out);
		}

		// write out library entries
		LibraryModel[] runtime = plugin.getRuntime();
		int runtimeSize = (runtime == null) ? 0 : runtime.length;
		if (runtimeSize != 0) {
			for (int i = 0; i < runtimeSize; i++) {
				writeLibrary(runtime[i], out);
			}
		}

		// need to worry about cross links here
		// now do extension points
		ExtensionPointModel[] extensionPoints = plugin.getDeclaredExtensionPoints();
		int extPointsSize = (extensionPoints == null) ? 0 : extensionPoints.length;
		if (extPointsSize != 0) {
			for (int i = 0; i < extPointsSize; i++)
				writeExtensionPoint(extensionPoints[i], out);
		}

		// and then extensions
		ExtensionModel[] extensions = plugin.getDeclaredExtensions();
		int extSize = (extensions == null) ? 0 : extensions.length;
		if (extSize != 0) {
			for (int i = 0; i < extSize; i++) {
				writeExtension(extensions[i], out);
			}
		}

		// and then fragments
		PluginFragmentModel[] fragments = plugin.getFragments();
		int fragmentSize = (fragments == null) ? 0 : fragments.length;
		if (fragmentSize != 0) {
			for (int i = 0; i < fragmentSize; i++) {
				writePluginFragment(fragments[i], out);
			}
		}

		// Add the index to the registry object for this plugin
		PluginRegistryModel parentRegistry = plugin.getRegistry();
		writeLabel(RegistryCacheReader.PLUGIN_PARENT_LABEL, out);
		// We can assume that the parent registry is already written out.
		out.writeInt(getFromObjectTable(parentRegistry));

		writeLabel(RegistryCacheReader.PLUGIN_END_LABEL, out);
	} catch (IOException ioe) {
		cacheWriteProblems.add(new Status(IStatus.WARNING, Platform.PI_RUNTIME, Platform.PARSE_PROBLEM, Policy.bind ("meta.regCacheIOException", RegistryCacheReader.decipherLabel(RegistryCacheReader.PLUGIN_LABEL)), ioe)); //$NON-NLS-1$
	}
}
public void writePluginFragment(PluginFragmentModel fragment, DataOutputStream out) {

	try {
		// Check to see if this fragment already exists in the objectTable.  If it is there,
		// it has already been written to the cache so just write out the index.
		int fragmentIndex = getFromObjectTable(fragment);
		if (fragmentIndex != -1) {
			// this fragment is already there
			writeLabel(RegistryCacheReader.FRAGMENT_INDEX_LABEL, out);
			out.writeInt(fragmentIndex);
			return;
		}

		// add this object to the object table first
		addToObjectTable(fragment);
		String outString;
		byte outByte;

		writeLabel(RegistryCacheReader.FRAGMENT_LABEL, out);
		
		writeLabel(RegistryCacheReader.READONLY_LABEL, out);
		out.writeBoolean(fragment.isReadOnly());

		writeLabel(RegistryCacheReader.START_LINE, out);
		out.writeInt(fragment.getStartLine());

		if ((outString = fragment.getName()) != null) {
			writeLabel(RegistryCacheReader.NAME_LABEL, out);
			out.writeUTF(outString);
		}
		if ((outString = fragment.getId()) != null) {
			writeLabel(RegistryCacheReader.ID_LABEL, out);
			out.writeUTF(outString);
		}
		if ((outString = fragment.getProviderName()) != null) {
			writeLabel(RegistryCacheReader.PLUGIN_PROVIDER_NAME_LABEL, out);
			out.writeUTF(outString);
		}
		if ((outString = fragment.getVersion()) != null) {
			writeLabel(RegistryCacheReader.VERSION_LABEL, out);
			out.writeUTF(outString);
		}
		if ((outString = fragment.getLocation()) != null) {
			writeLabel(RegistryCacheReader.PLUGIN_LOCATION_LABEL, out);
			out.writeUTF(outString);
		}
		if ((outString = fragment.getPlugin()) != null) {
			writeLabel(RegistryCacheReader.FRAGMENT_PLUGIN_LABEL, out);
			out.writeUTF(outString);
		}
		if ((outString = fragment.getPluginVersion()) != null) {
			writeLabel(RegistryCacheReader.FRAGMENT_PLUGIN_VERSION_LABEL, out);
			out.writeUTF(outString);
		}
		if ((outByte = fragment.getMatch()) != PluginFragmentModel.FRAGMENT_MATCH_UNSPECIFIED) {
			writeLabel(RegistryCacheReader.FRAGMENT_PLUGIN_MATCH_LABEL, out);
			out.writeByte(outByte);
		}

		// write out prerequisites
		PluginPrerequisiteModel[] requires = fragment.getRequires();
		int reqSize = (requires == null) ? 0 : requires.length;
		if (reqSize != 0) {
			for (int i = 0; i < reqSize; i++)
				writePluginPrerequisite(requires[i], out);
		}

		// write out library entries
		LibraryModel[] runtime = fragment.getRuntime();
		int runtimeSize = (runtime == null) ? 0 : runtime.length;
		if (runtimeSize != 0) {
			for (int i = 0; i < runtimeSize; i++) {
				writeLibrary(runtime[i], out);
			}
		}

		// need to worry about cross links here
		// now do extension points
		ExtensionPointModel[] extensionPoints = fragment.getDeclaredExtensionPoints();
		int extPointsSize = (extensionPoints == null) ? 0 : extensionPoints.length;
		if (extPointsSize != 0) {
			for (int i = 0; i < extPointsSize; i++)
				writeExtensionPoint(extensionPoints[i], out);
		}

		// and then extensions
		ExtensionModel[] extensions = fragment.getDeclaredExtensions();
		int extSize = (extensions == null) ? 0 : extensions.length;
		if (extSize != 0) {
			for (int i = 0; i < extSize; i++) {
				writeExtension(extensions[i], out);
			}
		}

		// Add the index to the registry object for this plugin
		PluginRegistryModel parentRegistry = fragment.getRegistry();
		writeLabel(RegistryCacheReader.PLUGIN_PARENT_LABEL, out);
		// We can assume that the parent registry is already written out.
		out.writeInt(getFromObjectTable(parentRegistry));

		writeLabel(RegistryCacheReader.FRAGMENT_END_LABEL, out);
	} catch (IOException ioe) {
		cacheWriteProblems.add(new Status(IStatus.WARNING, Platform.PI_RUNTIME, Platform.PARSE_PROBLEM, Policy.bind ("meta.regCacheIOException", RegistryCacheReader.decipherLabel(RegistryCacheReader.FRAGMENT_LABEL)), ioe)); //$NON-NLS-1$
	}
}
public void writePluginPrerequisite(PluginPrerequisiteModel requires, DataOutputStream out) {
	try {
		// Check to see if this prerequisite already exists in the objectTable.  If it
		// is there, it has already been written to the cache so just write out
		// the index.
		int requiresIndex = getFromObjectTable(requires);
		if (requiresIndex != -1) {
			// this library is already there
			writeLabel(RegistryCacheReader.REQUIRES_INDEX_LABEL, out);
			out.writeInt(requiresIndex);
			return;
		}
		// add this object to the object table first
		addToObjectTable(requires);
		String outString = null;

		writeLabel(RegistryCacheReader.PLUGIN_REQUIRES_LABEL, out);

		writeLabel(RegistryCacheReader.READONLY_LABEL, out);
		out.writeBoolean(requires.isReadOnly());

		writeLabel(RegistryCacheReader.START_LINE, out);
		out.writeInt(requires.getStartLine());

		if ((outString = requires.getName()) != null) {
			writeLabel(RegistryCacheReader.NAME_LABEL, out);
			out.writeUTF(outString);
		}

		if ((outString = requires.getVersion()) != null) {
			writeLabel(RegistryCacheReader.VERSION_LABEL, out);
			out.writeUTF(outString);
		}
		
		byte outMatch = requires.getMatchByte();
		if (outMatch != PluginPrerequisiteModel.PREREQ_MATCH_UNSPECIFIED) {
			writeLabel(RegistryCacheReader.REQUIRES_MATCH_LABEL, out);
			out.writeByte(requires.getMatchByte());
		}

		writeLabel(RegistryCacheReader.REQUIRES_EXPORT_LABEL, out);
		out.writeBoolean(requires.getExport());

		writeLabel(RegistryCacheReader.REQUIRES_OPTIONAL_LABEL, out);
		out.writeBoolean(requires.getOptional());

		if ((outString = requires.getResolvedVersion()) != null) {
			writeLabel(RegistryCacheReader.REQUIRES_RESOLVED_VERSION_LABEL, out);
			out.writeUTF(outString);
		}

		if ((outString = requires.getPlugin()) != null) {
			writeLabel(RegistryCacheReader.REQUIRES_PLUGIN_NAME_LABEL, out);
			out.writeUTF(outString);
		}

		writeLabel(RegistryCacheReader.REQUIRES_END_LABEL, out);
	} catch (IOException ioe) {
		cacheWriteProblems.add(new Status(IStatus.WARNING, Platform.PI_RUNTIME, Platform.PARSE_PROBLEM, Policy.bind ("meta.regCacheIOException", RegistryCacheReader.decipherLabel(RegistryCacheReader.PLUGIN_REQUIRES_LABEL)), ioe)); //$NON-NLS-1$
	}
}
public void writePluginRegistry(PluginRegistryModel registry, DataOutputStream out) {
	if (cacheWriteProblems == null) {
		cacheWriteProblems = new MultiStatus(Platform.PI_RUNTIME, Platform.PARSE_PROBLEM, Policy.bind("meta.registryCacheWriteProblems"), null); //$NON-NLS-1$
	}

	try {
		// Check to see if this registry already exists in the objectTable.  If it is there,
		// it has already been written to the cache so just write out the index.
		if (objectTable != null) {
			int registryIndex = getFromObjectTable(registry);
			if (registryIndex != -1) {
				// this plugin is already there
				writeLabel(RegistryCacheReader.REGISTRY_INDEX_LABEL, out);
				out.writeInt(registryIndex);
				return;
			}
		}

		// add this object to the object table first
		addToObjectTable(registry);
		writeHeaderInformation(out);
	
		writeLabel(RegistryCacheReader.REGISTRY_LABEL, out);

		writeLabel(RegistryCacheReader.READONLY_LABEL, out);
		out.writeBoolean(registry.isReadOnly());

		writeLabel(RegistryCacheReader.REGISTRY_RESOLVED_LABEL, out);
		out.writeBoolean(registry.isResolved());
		PluginDescriptorModel[] pluginList = registry.getPlugins();
		for (int i = 0; i < pluginList.length; i++)
			writePluginDescriptor(pluginList[i], out);
		PluginFragmentModel[] fragmentList = registry.getFragments();
		int fragmentLength = (fragmentList == null) ? 0 : fragmentList.length;
		for (int i = 0; i < fragmentLength; i++)
			writePluginFragment(fragmentList[i], out);
		writeLabel(RegistryCacheReader.REGISTRY_END_LABEL, out);
	} catch (IOException ioe) {
		cacheWriteProblems.add(new Status(IStatus.WARNING, Platform.PI_RUNTIME, Platform.PARSE_PROBLEM, Policy.bind ("meta.regCacheIOException", RegistryCacheReader.decipherLabel(RegistryCacheReader.REGISTRY_LABEL)), ioe)); //$NON-NLS-1$
	}
}
}