| /******************************************************************************* |
| * Copyright (c) 2014, 2017 1C-Soft LLC and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * Vladimir Piskarev (1C) - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.handly.model.impl; |
| |
| import java.util.Arrays; |
| import java.util.HashSet; |
| import java.util.Map; |
| import java.util.Set; |
| |
| import org.eclipse.handly.model.IElement; |
| import org.eclipse.handly.model.IElementDeltaConstants; |
| import org.eclipse.handly.model.ISourceConstruct; |
| import org.eclipse.handly.model.ISourceElementInfo; |
| import org.eclipse.handly.snapshot.ISnapshot; |
| import org.eclipse.handly.util.Property; |
| import org.eclipse.handly.util.TextRange; |
| |
| /** |
| * Holds cached structure and properties for a source element. |
| * Can be subclassed for specific kinds of elements. |
| * |
| * @see ISourceElementInfo |
| */ |
| public class SourceElementBody |
| extends Body |
| implements ISourceElementInfo |
| { |
| private static final InternalProperty[] NO_PROPERTIES = |
| new InternalProperty[0]; |
| |
| private ISnapshot snapshot; |
| private InternalProperty[] properties = NO_PROPERTIES; |
| private TextRange fullRange; |
| private TextRange identifyingRange; |
| |
| @Override |
| public ISourceConstruct[] getChildren() |
| { |
| IElement[] children = super.getChildren(); |
| int length = children.length; |
| ISourceConstruct[] result = new ISourceConstruct[length]; |
| System.arraycopy(children, 0, result, 0, length); |
| return result; |
| } |
| |
| @SuppressWarnings("unchecked") |
| @Override |
| public <T> T get(Property<T> p) |
| { |
| return (T)getPropertyValue(p.getName()); |
| } |
| |
| @Override |
| public ISnapshot getSnapshot() |
| { |
| return snapshot; |
| } |
| |
| @Override |
| public TextRange getFullRange() |
| { |
| return fullRange; |
| } |
| |
| @Override |
| public TextRange getIdentifyingRange() |
| { |
| return identifyingRange; |
| } |
| |
| /** |
| * Sets the value of the given property. |
| * |
| * @param p a source element's property (not <code>null</code>) |
| * @param value the value of the given property (may be <code>null</code>) |
| */ |
| public <T> void set(Property<T> p, T value) |
| { |
| String name = p.getName(); |
| int len = properties.length; |
| if (len == 0) |
| properties = new InternalProperty[] { new InternalProperty(name, |
| value) }; |
| else |
| { |
| for (int i = 0; i < len; i++) |
| { |
| if (properties[i].name.equals(name)) |
| { |
| properties[i].value = value; |
| return; |
| } |
| } |
| InternalProperty[] newProperties = new InternalProperty[len + 1]; |
| System.arraycopy(properties, 0, newProperties, 0, len); |
| newProperties[len] = new InternalProperty(name, value); |
| properties = newProperties; |
| } |
| } |
| |
| /** |
| * Sets the source snapshot on which this object is based. |
| * |
| * @param snapshot |
| */ |
| public void setSnapshot(ISnapshot snapshot) |
| { |
| this.snapshot = snapshot; |
| } |
| |
| /** |
| * Sets the text range of the source element. |
| * |
| * @param fullRange |
| */ |
| public void setFullRange(TextRange fullRange) |
| { |
| this.fullRange = fullRange; |
| } |
| |
| /** |
| * Sets the text range of the source element's identifier. |
| * |
| * @param identifyingRange |
| */ |
| public void setIdentifyingRange(TextRange identifyingRange) |
| { |
| this.identifyingRange = identifyingRange; |
| } |
| |
| @Override |
| public void findContentChange(Body oldBody, IElement element, |
| ElementDelta.Builder builder) |
| { |
| Set<String> newPropertyNames = getPropertyNames(); |
| Set<String> oldPropertyNames = |
| ((SourceElementBody)oldBody).getPropertyNames(); |
| Set<String> combinedPropertyNames = new HashSet<String>( |
| newPropertyNames.size() + oldPropertyNames.size()); |
| combinedPropertyNames.addAll(newPropertyNames); |
| combinedPropertyNames.addAll(oldPropertyNames); |
| for (String propertyName : combinedPropertyNames) |
| { |
| Object newValue = getPropertyValue(propertyName); |
| Object oldValue = ((SourceElementBody)oldBody).getPropertyValue( |
| propertyName); |
| if (isPropertyChanged(propertyName, newValue, oldValue)) |
| { |
| builder.changed(element, IElementDeltaConstants.F_CONTENT); |
| return; |
| } |
| } |
| } |
| |
| /** |
| * Returns whether the given property has changed value. |
| * <p> |
| * Default implementation compares the new value and the old value |
| * for equality (arrays are compared with <code>Arrays.equals</code>). |
| * </p> |
| * |
| * @param propertyName the name of the property (never <code>null</code>) |
| * @param newValue the new value of the property (may be <code>null</code>) |
| * @param oldValue the old value of the property (may be <code>null</code>) |
| * @return <code>true</code> if the property has changed value, and |
| * <code>false</code> otherwise |
| */ |
| protected boolean isPropertyChanged(String propertyName, Object newValue, |
| Object oldValue) |
| { |
| if (newValue == null) |
| { |
| if (oldValue != null) |
| return true; |
| } |
| else |
| { |
| // @formatter:off |
| boolean eq; |
| if (newValue instanceof Object[] && oldValue instanceof Object[]) |
| eq = Arrays.deepEquals((Object[])newValue, (Object[])oldValue); |
| else if (newValue instanceof byte[] && oldValue instanceof byte[]) |
| eq = Arrays.equals((byte[])newValue, (byte[])oldValue); |
| else if (newValue instanceof short[] && oldValue instanceof short[]) |
| eq = Arrays.equals((short[])newValue, (short[])oldValue); |
| else if (newValue instanceof int[] && oldValue instanceof int[]) |
| eq = Arrays.equals((int[])newValue, (int[])oldValue); |
| else if (newValue instanceof long[] && oldValue instanceof long[]) |
| eq = Arrays.equals((long[])newValue, (long[])oldValue); |
| else if (newValue instanceof char[] && oldValue instanceof char[]) |
| eq = Arrays.equals((char[])newValue, (char[])oldValue); |
| else if (newValue instanceof float[] && oldValue instanceof float[]) |
| eq = Arrays.equals((float[])newValue, (float[])oldValue); |
| else if (newValue instanceof double[] && oldValue instanceof double[]) |
| eq = Arrays.equals((double[])newValue, (double[])oldValue); |
| else if (newValue instanceof boolean[] && oldValue instanceof boolean[]) |
| eq = Arrays.equals((boolean[])newValue, (boolean[])oldValue); |
| else |
| eq = newValue.equals(oldValue); |
| if (!eq) |
| return true; |
| // @formatter:on |
| } |
| return false; |
| } |
| |
| protected final Object getPropertyValue(String propertyName) |
| { |
| int length = properties.length; |
| for (int i = 0; i < length; i++) |
| { |
| InternalProperty property = properties[i]; |
| if (property.name.equals(propertyName)) |
| return property.value; |
| } |
| return null; |
| } |
| |
| protected final Set<String> getPropertyNames() |
| { |
| int length = properties.length; |
| Set<String> names = new HashSet<String>(length); |
| for (int i = 0; i < length; i++) |
| names.add(properties[i].name); |
| return names; |
| } |
| |
| void setSnapshot(ISnapshot snapshot, Map<IElement, Object> newElements) |
| { |
| setSnapshot(snapshot); |
| for (IElement child : getChildren()) |
| { |
| Object childBody = newElements.get(child); |
| if (childBody instanceof SourceElementBody) |
| { |
| ((SourceElementBody)childBody).setSnapshot(snapshot, |
| newElements); |
| } |
| } |
| } |
| |
| private static class InternalProperty |
| { |
| public final String name; |
| public Object value; |
| |
| public InternalProperty(String name, Object value) |
| { |
| this.name = name; |
| this.value = value; |
| } |
| } |
| } |