author | Eugene Ostroukhov <eugeneo@symbian.org> |
Thu, 19 Aug 2010 17:48:04 -0700 | |
changeset 470 | d4809db37847 |
parent 355 | org.chromium.debug.core/src/org/chromium/debug/core/SourceNameMapperContainer.java@8726e95bcbba |
permissions | -rw-r--r-- |
355
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package org.chromium.debug.core; |
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import org.eclipse.core.runtime.CoreException; |
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import org.eclipse.core.runtime.IStatus; |
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import org.eclipse.core.runtime.Status; |
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import org.eclipse.debug.core.DebugPlugin; |
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import org.eclipse.debug.core.sourcelookup.ISourceContainer; |
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import org.eclipse.debug.core.sourcelookup.ISourceContainerType; |
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import org.eclipse.debug.core.sourcelookup.ISourceContainerTypeDelegate; |
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import org.eclipse.debug.core.sourcelookup.ISourceLookupDirector; |
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import org.eclipse.osgi.util.NLS; |
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/** |
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* A special type of container that translates names of the source and delegates lookup |
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* to another source container. |
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* This could be useful when JS resource name is like "http://localhost/scripts/util.js"; such |
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* source name could be converted into "scripts/util.js". |
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* Currently container supports only prefix-based translation: if source name starts with a prefix, |
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* the prefix is truncated; otherwise the source name is discarded. |
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*/ |
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public class SourceNameMapperContainer implements ISourceContainer { |
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private static final String TYPE_ID = |
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"org.chromium.debug.core.SourceNameMapperContainer.type"; //$NON-NLS-1$ |
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private final ISourceContainer targetContainer; |
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private final String prefix; |
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public SourceNameMapperContainer(String prefix, ISourceContainer targetContainer) { |
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this.targetContainer = targetContainer; |
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this.prefix = prefix; |
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} |
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public void dispose() { |
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} |
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public String getPrefix() { |
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return prefix; |
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} |
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public ISourceContainer getTargetContainer() { |
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return targetContainer; |
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} |
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public Object[] findSourceElements(String name) throws CoreException { |
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if (!name.startsWith(prefix)) { |
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return new Object[0]; |
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} |
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String shortName = name.substring(prefix.length()); |
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return targetContainer.findSourceElements(shortName); |
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} |
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public String getName() { |
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return NLS.bind(Messages.SourceNameMapperContainer_NAME, prefix); |
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} |
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public ISourceContainer[] getSourceContainers() { |
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return new ISourceContainer[] { targetContainer }; |
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} |
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public ISourceContainerType getType() { |
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return DebugPlugin.getDefault().getLaunchManager().getSourceContainerType(TYPE_ID); |
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} |
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public void init(ISourceLookupDirector director) { |
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} |
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public boolean isComposite() { |
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return true; |
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} |
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private String getMemento() throws CoreException { |
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StringBuilder builder = new StringBuilder(); |
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MementoFormat.encodeComponent(prefix, builder); |
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MementoFormat.encodeComponent(targetContainer.getType().getId(), builder); |
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MementoFormat.encodeComponent(targetContainer.getType().getMemento(targetContainer), builder); |
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return builder.toString(); |
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} |
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public Object getAdapter(Class adapter) { |
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return null; |
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} |
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/** |
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* A type delegate that serializes/deserializes container instances into/from memento. |
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*/ |
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public static class TypeDelegate implements ISourceContainerTypeDelegate { |
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public ISourceContainer createSourceContainer(String memento) throws CoreException { |
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MementoFormat.Parser parser = new MementoFormat.Parser(memento); |
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String prefix; |
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String typeId; |
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String subContainerMemento; |
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try { |
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prefix = parser.nextComponent(); |
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typeId = parser.nextComponent(); |
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subContainerMemento = parser.nextComponent(); |
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} catch (MementoFormat.ParserException e) { |
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throw new CoreException(new Status(IStatus.ERROR, |
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ChromiumDebugPlugin.PLUGIN_ID, "Failed to parse memento", e)); //$NON-NLS-1$ |
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} |
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ISourceContainerType subContainerType = |
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DebugPlugin.getDefault().getLaunchManager().getSourceContainerType(typeId); |
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ISourceContainer subContainer = subContainerType.createSourceContainer(subContainerMemento); |
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return new SourceNameMapperContainer(prefix, subContainer); |
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} |
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public String getMemento(ISourceContainer container) throws CoreException { |
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SourceNameMapperContainer chromeContainer = (SourceNameMapperContainer) container; |
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return chromeContainer.getMemento(); |
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} |
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} |
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/** |
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* Handles memento string format. The format is just a sequence of strings that are preceded |
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* with their lengths and decorated with parentheses to make it more human-readable. |
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*/ |
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private static class MementoFormat { |
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static void encodeComponent(String component, StringBuilder output) { |
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output.append(component.length()); |
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output.append('(').append(component).append(')'); |
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} |
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/** |
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* A simple parser that reads char sequence as a sequence of strings. |
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*/ |
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static class Parser { |
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private final CharSequence charSequence; |
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private int pos = 0; |
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Parser(CharSequence charSequence) { |
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this.charSequence = charSequence; |
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} |
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String nextComponent() throws ParserException { |
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if (pos >= charSequence.length()) { |
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throw new ParserException("Unexpected end of line"); //$NON-NLS-1$ |
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} |
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char ch = charSequence.charAt(pos); |
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pos++; |
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int num = Character.digit(ch, 10); |
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if (num == -1) { |
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throw new ParserException("Digit expected"); //$NON-NLS-1$ |
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} |
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int len = num; |
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while (true) { |
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if (pos >= charSequence.length()) { |
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throw new ParserException("Unexpected end of line"); //$NON-NLS-1$ |
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} |
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ch = charSequence.charAt(pos); |
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if (!Character.isDigit(ch)) { |
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break; |
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} |
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pos++; |
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num = Character.digit(ch, 10); |
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if (num == -1) { |
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throw new ParserException("Digit expected"); //$NON-NLS-1$ |
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} |
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len = len * 10 + num; |
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} |
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pos++; |
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if (pos + len + 1 > charSequence.length()) { |
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throw new ParserException("Unexpected end of line"); //$NON-NLS-1$ |
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} |
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String result = charSequence.subSequence(pos, pos + len).toString(); |
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pos += len + 1; |
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return result; |
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} |
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} |
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private static class ParserException extends Exception { |
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ParserException() { |
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} |
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ParserException(String message, Throwable cause) { |
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super(message, cause); |
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} |
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ParserException(String message) { |
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super(message); |
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} |
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ParserException(Throwable cause) { |
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super(cause); |
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} |
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} |
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} |
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} |