| /*=============================================================================# |
| # Copyright (c) 2011, 2020 Stephan Wahlbrink and others. |
| # |
| # This program and the accompanying materials are made available under the |
| # terms of the Eclipse Public License 2.0 which is available at |
| # https://www.eclipse.org/legal/epl-2.0, or the Apache License, Version 2.0 |
| # which is available at https://www.apache.org/licenses/LICENSE-2.0. |
| # |
| # SPDX-License-Identifier: EPL-2.0 OR Apache-2.0 |
| # |
| # Contributors: |
| # Stephan Wahlbrink <sw@wahlbrink.eu> - initial API and implementation |
| #=============================================================================*/ |
| |
| package org.eclipse.statet.ltk.model.core.impl; |
| |
| import java.util.Collections; |
| import java.util.List; |
| |
| import org.eclipse.core.runtime.IProgressMonitor; |
| import org.eclipse.core.runtime.SubMonitor; |
| import org.eclipse.jface.text.AbstractDocument; |
| import org.eclipse.jface.text.ISynchronizable; |
| |
| import org.eclipse.statet.ecommons.text.ISourceFragment; |
| |
| import org.eclipse.statet.ltk.ast.core.AstInfo; |
| import org.eclipse.statet.ltk.core.ElementName; |
| import org.eclipse.statet.ltk.core.SourceContent; |
| import org.eclipse.statet.ltk.model.core.elements.IModelElement; |
| import org.eclipse.statet.ltk.model.core.elements.ISourceUnit; |
| import org.eclipse.statet.ltk.model.core.elements.ISourceUnitModelInfo; |
| |
| |
| public abstract class GenericFragmentSourceUnit implements ISourceUnit { |
| |
| |
| private final ElementName name; |
| |
| private final ISourceFragment fragment; |
| private final long timestamp; |
| |
| private AbstractDocument document; |
| |
| private int counter= 0; |
| |
| |
| public GenericFragmentSourceUnit(final String id, final ISourceFragment fragment) { |
| if (fragment == null) { |
| throw new NullPointerException("fragment"); //$NON-NLS-1$ |
| } |
| this.fragment= fragment; |
| this.name= new ElementName() { |
| @Override |
| public int getType() { |
| return 0x011; |
| } |
| @Override |
| public String getDisplayName() { |
| return GenericFragmentSourceUnit.this.fragment.getName(); |
| } |
| @Override |
| public String getSegmentName() { |
| return GenericFragmentSourceUnit.this.fragment.getName(); |
| } |
| @Override |
| public ElementName getNextSegment() { |
| return null; |
| } |
| }; |
| this.timestamp= System.currentTimeMillis(); |
| } |
| |
| |
| @Override |
| public ISourceUnit getUnderlyingUnit() { |
| return null; |
| } |
| |
| @Override |
| public boolean isSynchronized() { |
| return true; |
| } |
| |
| @Override |
| public String getId() { |
| return this.fragment.getId(); |
| } |
| |
| public ISourceFragment getFragment() { |
| return this.fragment; |
| } |
| |
| /** |
| * {@inheritDoc} |
| * |
| * A source unit of this type is usually of the type |
| * {@link IModelElement#C2_SOURCE_CHUNK C2_SOURCE_CHUNK}. |
| */ |
| @Override |
| public int getElementType() { |
| return IModelElement.C2_SOURCE_CHUNK; |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| @Override |
| public ElementName getElementName() { |
| return this.name; |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| @Override |
| public boolean exists() { |
| return this.counter > 0; |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| @Override |
| public boolean isReadOnly() { |
| return true; |
| } |
| |
| @Override |
| public boolean checkState(final boolean validate, final IProgressMonitor monitor) { |
| return false; |
| } |
| |
| |
| /** |
| * {@inheritDoc} |
| * |
| * A source unit of this type is usually doesn't have a resource/path. |
| */ |
| @Override |
| public Object getResource() { |
| return null; |
| } |
| |
| |
| /** |
| * {@inheritDoc} |
| */ |
| @Override |
| public synchronized AbstractDocument getDocument(final IProgressMonitor monitor) { |
| if (this.document == null) { |
| this.document= this.fragment.getDocument(); |
| } |
| return this.document; |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| @Override |
| public long getContentStamp(final IProgressMonitor monitor) { |
| return this.timestamp; |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| @Override |
| public SourceContent getContent(final IProgressMonitor monitor) { |
| final AbstractDocument document= getDocument(monitor); |
| Object lockObject= null; |
| if (document instanceof ISynchronizable) { |
| lockObject= ((ISynchronizable) document).getLockObject(); |
| } |
| if (lockObject == null) { |
| lockObject= this.fragment; |
| } |
| synchronized (lockObject) { |
| return new SourceContent(document.getModificationStamp(), document.get()); |
| } |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| @Override |
| @SuppressWarnings("unchecked") |
| public <T> T getAdapter(final Class<T> adapterType) { |
| if (adapterType == ISourceFragment.class) { |
| return (T) this.fragment; |
| } |
| return null; |
| } |
| |
| |
| /** |
| * {@inheritDoc} |
| */ |
| @Override |
| public AstInfo getAstInfo(final String type, final boolean ensureSync, final IProgressMonitor monitor) { |
| return null; |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| @Override |
| public ISourceUnitModelInfo getModelInfo(final String type, final int syncLevel, final IProgressMonitor monitor) { |
| return null; |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| @Override |
| public IModelElement getModelParent() { |
| return null; |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| @Override |
| public boolean hasModelChildren(final Filter filter) { |
| return false; |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| @Override |
| public List<? extends IModelElement> getModelChildren(final Filter filter) { |
| return Collections.EMPTY_LIST; |
| } |
| |
| |
| /** |
| * {@inheritDoc} |
| */ |
| @Override |
| public synchronized final void connect(final IProgressMonitor monitor) { |
| this.counter++; |
| if (this.counter == 1) { |
| final SubMonitor m= SubMonitor.convert(monitor, 1); |
| register(); |
| } |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| @Override |
| public synchronized final void disconnect(final IProgressMonitor monitor) { |
| this.counter--; |
| if (this.counter == 0) { |
| unregister(); |
| } |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| @Override |
| public synchronized boolean isConnected() { |
| return (this.counter > 0); |
| } |
| |
| protected void register() { |
| } |
| |
| protected void unregister() { |
| } |
| |
| |
| @Override |
| public String toString() { |
| return getModelTypeId() + '/' + getWorkingContext() + ": " + getId(); //$NON-NLS-1$ |
| } |
| |
| } |