com.google.gwt.inject.rebind.util.SourceSnippets Maven / Gradle / Ivy
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/*
* Copyright 2011 Google Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not
* use this file except in compliance with the License. You may obtain a copy of
* the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations under
* the License.
*/
package com.google.gwt.inject.rebind.util;
import com.google.gwt.inject.rebind.GinjectorBindings;
import com.google.inject.Key;
import com.google.inject.TypeLiteral;
import java.util.ArrayList;
/**
* Utility class for source snippets.
*/
public final class SourceSnippets {
private SourceSnippets() {
}
/**
* Creates a snippet that evaluates to an injected instance of the given key,
* as produced by the given child.
*/
public static SourceSnippet callChildGetter(final GinjectorBindings childBindings,
final Key key) {
return new SourceSnippet() {
public String getSource(InjectorWriteContext writeContext) {
return writeContext.callChildGetter(childBindings, key);
}
};
}
/**
* Creates a snippet that evaluates to an injected instance of the given key
* in the current {@link GinjectorBindings}.
*/
public static SourceSnippet callGetter(final Key key) {
return new SourceSnippet() {
public String getSource(InjectorWriteContext writeContext) {
return writeContext.callGetter(key);
}
};
}
/**
* Creates a snippet (including a trailing semicolon) that performs member
* injection on a value of the given type.
*
* @param type the type of value to perform member injection on
* @param input a Java expression that evaluates to the object that should be
* member-injected
*/
public static SourceSnippet callMemberInject(final TypeLiteral type, final String input) {
return new SourceSnippet() {
public String getSource(InjectorWriteContext writeContext) {
return writeContext.callMemberInject(type, input);
}
};
}
/**
* Creates a snippet that evaluates to an invocation of the named method on
* the given package fragment.
*
* Used when generating an intermediate invoker method; see
* {@link MethodCallUtil#createMethodCallWithInjection}.
*/
public static SourceSnippet callMethod(final String methodName, final String fragmentPackageName,
final Iterable parameters) {
return new SourceSnippet() {
public String getSource(InjectorWriteContext writeContext) {
return writeContext.callMethod(methodName, fragmentPackageName, parameters);
}
};
}
/**
* Creates a snippet that evaluates to an injected instance of the given key,
* as produced by the given parent injector.
*/
public static SourceSnippet callParentGetter(final Key key,
final GinjectorBindings parentBindings) {
return new SourceSnippet() {
public String getSource(InjectorWriteContext writeContext) {
return writeContext.callParentGetter(key, parentBindings);
}
};
}
/**
* Creates a snippet that evaluates to the implementation of the current
* Ginjector interface.
*/
public static SourceSnippet callGinjectorInterfaceGetter() {
return new SourceSnippet() {
public String getSource(InjectorWriteContext writeContext) {
return writeContext.callGinjectorInterfaceGetter();
}
};
}
/** Creates a snippet that generates a constant text string. */
public static SourceSnippet forText(final String text) {
return new SourceSnippet() {
public String getSource(InjectorWriteContext writeContext) {
return text;
}
};
}
/**
* Creates an {@link InjectorMethod} using the given {@link SourceSnippet} as
* its body.
*
* @param isNative whether the returned method is a native method
* @param signature the signature of the returned method
* @param pkg the package in which the returned method should be created
* @param body the body text of the new method
*/
public static InjectorMethod asMethod(boolean isNative, String signature, String pkg,
final SourceSnippet body) {
return new AbstractInjectorMethod(isNative, signature, pkg) {
public String getMethodBody(InjectorWriteContext writeContext) {
return body.getSource(writeContext);
}
};
}
}