diff options
Diffstat (limited to 'org.jacoco.core/src/org/jacoco/core/internal/analysis/ContentTypeDetector.java')
| -rw-r--r-- | org.jacoco.core/src/org/jacoco/core/internal/analysis/ContentTypeDetector.java | 206 |
1 files changed, 103 insertions, 103 deletions
diff --git a/org.jacoco.core/src/org/jacoco/core/internal/analysis/ContentTypeDetector.java b/org.jacoco.core/src/org/jacoco/core/internal/analysis/ContentTypeDetector.java index 33804396..d8e369fb 100644 --- a/org.jacoco.core/src/org/jacoco/core/internal/analysis/ContentTypeDetector.java +++ b/org.jacoco.core/src/org/jacoco/core/internal/analysis/ContentTypeDetector.java @@ -1,103 +1,103 @@ -/*******************************************************************************
- * Copyright (c) 2009, 2012 Mountainminds GmbH & Co. KG and Contributors
- * 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:
- * Marc R. Hoffmann - initial API and implementation
- *
- *******************************************************************************/
-package org.jacoco.core.internal.analysis;
-
-import java.io.BufferedInputStream;
-import java.io.IOException;
-import java.io.InputStream;
-
-import org.objectweb.asm.Opcodes;
-
-/**
- * Detector for content types of binary streams based on a magic headers.
- */
-public class ContentTypeDetector {
-
- /** Unknown file type */
- public static final int UNKNOWN = -1;
-
- /** File type Java class */
- public static final int CLASSFILE = 0xcafebabe;
-
- /** File type ZIP archive */
- public static final int ZIPFILE = 0x504b0304;
-
- private static final int BUFFER_SIZE = 8;
-
- private final InputStream in;
-
- private final int type;
-
- /**
- * Creates a new detector based on the given input. To process the complete
- * original input afterwards use the stream returned by
- * {@link #getInputStream()}.
- *
- * @param in
- * input to read the header from
- * @throws IOException
- */
- public ContentTypeDetector(final InputStream in) throws IOException {
- if (in.markSupported()) {
- this.in = in;
- } else {
- this.in = new BufferedInputStream(in, BUFFER_SIZE);
- }
- this.in.mark(BUFFER_SIZE);
- this.type = determineType(this.in);
- this.in.reset();
- }
-
- private static int determineType(final InputStream in) throws IOException {
- switch (readInt(in)) {
- case ZIPFILE:
- return ZIPFILE;
- case CLASSFILE:
- // also verify version to distinguish from Mach Object files:
- switch (readInt(in)) {
- case Opcodes.V1_1:
- case Opcodes.V1_2:
- case Opcodes.V1_3:
- case Opcodes.V1_4:
- case Opcodes.V1_5:
- case Opcodes.V1_6:
- case Opcodes.V1_7:
- return CLASSFILE;
- }
- }
- return UNKNOWN;
- }
-
- private static int readInt(final InputStream in) throws IOException {
- return in.read() << 24 | in.read() << 16 | in.read() << 8 | in.read();
- }
-
- /**
- * Returns an input stream instance to read the complete content (including
- * the header) of the underlying stream.
- *
- * @return input stream containing the complete content
- */
- public InputStream getInputStream() {
- return in;
- }
-
- /**
- * Returns the detected file type.
- *
- * @return file type
- */
- public int getType() {
- return type;
- }
-
-}
+/******************************************************************************* + * Copyright (c) 2009, 2012 Mountainminds GmbH & Co. KG and Contributors + * 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: + * Marc R. Hoffmann - initial API and implementation + * + *******************************************************************************/ +package org.jacoco.core.internal.analysis; + +import java.io.BufferedInputStream; +import java.io.IOException; +import java.io.InputStream; + +import org.objectweb.asm.Opcodes; + +/** + * Detector for content types of binary streams based on a magic headers. + */ +public class ContentTypeDetector { + + /** Unknown file type */ + public static final int UNKNOWN = -1; + + /** File type Java class */ + public static final int CLASSFILE = 0xcafebabe; + + /** File type ZIP archive */ + public static final int ZIPFILE = 0x504b0304; + + private static final int BUFFER_SIZE = 8; + + private final InputStream in; + + private final int type; + + /** + * Creates a new detector based on the given input. To process the complete + * original input afterwards use the stream returned by + * {@link #getInputStream()}. + * + * @param in + * input to read the header from + * @throws IOException + */ + public ContentTypeDetector(final InputStream in) throws IOException { + if (in.markSupported()) { + this.in = in; + } else { + this.in = new BufferedInputStream(in, BUFFER_SIZE); + } + this.in.mark(BUFFER_SIZE); + this.type = determineType(this.in); + this.in.reset(); + } + + private static int determineType(final InputStream in) throws IOException { + switch (readInt(in)) { + case ZIPFILE: + return ZIPFILE; + case CLASSFILE: + // also verify version to distinguish from Mach Object files: + switch (readInt(in)) { + case Opcodes.V1_1: + case Opcodes.V1_2: + case Opcodes.V1_3: + case Opcodes.V1_4: + case Opcodes.V1_5: + case Opcodes.V1_6: + case Opcodes.V1_7: + return CLASSFILE; + } + } + return UNKNOWN; + } + + private static int readInt(final InputStream in) throws IOException { + return in.read() << 24 | in.read() << 16 | in.read() << 8 | in.read(); + } + + /** + * Returns an input stream instance to read the complete content (including + * the header) of the underlying stream. + * + * @return input stream containing the complete content + */ + public InputStream getInputStream() { + return in; + } + + /** + * Returns the detected file type. + * + * @return file type + */ + public int getType() { + return type; + } + +} |